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foundationdb/fdbclient/NativeAPI.actor.cpp

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/*
* NativeAPI.actor.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "fdbclient/NativeAPI.actor.h"
#include <algorithm>
#include <iterator>
#include <regex>
#include <unordered_set>
#include <tuple>
#include <utility>
#include <vector>
#include "contrib/fmt-8.0.1/include/fmt/format.h"
#include "fdbclient/FDBTypes.h"
#include "fdbrpc/FailureMonitor.h"
#include "fdbrpc/MultiInterface.h"
#include "fdbclient/ActorLineageProfiler.h"
#include "fdbclient/AnnotateActor.h"
#include "fdbclient/Atomic.h"
#include "fdbclient/BlobGranuleCommon.h"
#include "fdbclient/ClusterInterface.h"
#include "fdbclient/ClusterConnectionFile.h"
#include "fdbclient/CoordinationInterface.h"
#include "fdbclient/DatabaseContext.h"
#include "fdbclient/GlobalConfig.actor.h"
#include "fdbclient/IKnobCollection.h"
#include "fdbclient/JsonBuilder.h"
#include "fdbclient/KeyBackedTypes.h"
#include "fdbclient/KeyRangeMap.h"
#include "fdbclient/ManagementAPI.actor.h"
#include "fdbclient/NameLineage.h"
#include "fdbclient/CommitProxyInterface.h"
#include "fdbclient/MonitorLeader.h"
#include "fdbclient/MutationList.h"
#include "fdbclient/ReadYourWrites.h"
#include "fdbclient/ParallelStream.actor.h"
#include "fdbclient/SpecialKeySpace.actor.h"
#include "fdbclient/StorageServerInterface.h"
#include "fdbclient/SystemData.h"
#include "fdbclient/TransactionLineage.h"
#include "fdbclient/versions.h"
#include "fdbclient/WellKnownEndpoints.h"
#include "fdbrpc/LoadBalance.h"
#include "fdbrpc/Net2FileSystem.h"
#include "fdbrpc/simulator.h"
#include "flow/Arena.h"
#include "flow/ActorCollection.h"
#include "flow/DeterministicRandom.h"
#include "flow/Error.h"
#include "flow/FastRef.h"
#include "flow/IRandom.h"
#include "flow/flow.h"
#include "flow/genericactors.actor.h"
#include "flow/Knobs.h"
#include "flow/Platform.h"
#include "flow/SystemMonitor.h"
#include "flow/TLSConfig.actor.h"
#include "flow/Tracing.h"
#include "flow/UnitTest.h"
#include "flow/network.h"
#include "flow/serialize.h"
#ifdef ADDRESS_SANITIZER
#include <sanitizer/lsan_interface.h>
#endif
#ifdef WIN32
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#undef min
#undef max
#else
#include <time.h>
#endif
#include "flow/actorcompiler.h" // This must be the last #include.
extern const char* getSourceVersion();
namespace {
TransactionLineageCollector transactionLineageCollector;
NameLineageCollector nameLineageCollector;
template <class Interface, class Request>
Future<REPLY_TYPE(Request)> loadBalance(
DatabaseContext* ctx,
const Reference<LocationInfo> alternatives,
RequestStream<Request> Interface::*channel,
const Request& request = Request(),
TaskPriority taskID = TaskPriority::DefaultPromiseEndpoint,
AtMostOnce atMostOnce =
AtMostOnce::False, // if true, throws request_maybe_delivered() instead of retrying automatically
QueueModel* model = nullptr) {
if (alternatives->hasCaches) {
return loadBalance(alternatives->locations(), channel, request, taskID, atMostOnce, model);
}
return fmap(
[ctx](auto const& res) {
if (res.cached) {
ctx->updateCache.trigger();
}
return res;
},
loadBalance(alternatives->locations(), channel, request, taskID, atMostOnce, model));
}
} // namespace
FDB_BOOLEAN_PARAM(TransactionRecordLogInfo);
FDB_DEFINE_BOOLEAN_PARAM(UseProvisionalProxies);
NetworkOptions networkOptions;
TLSConfig tlsConfig(TLSEndpointType::CLIENT);
// The default values, TRACE_DEFAULT_ROLL_SIZE and TRACE_DEFAULT_MAX_LOGS_SIZE are located in Trace.h.
NetworkOptions::NetworkOptions()
: traceRollSize(TRACE_DEFAULT_ROLL_SIZE), traceMaxLogsSize(TRACE_DEFAULT_MAX_LOGS_SIZE), traceLogGroup("default"),
traceFormat("xml"), traceClockSource("now"),
supportedVersions(new ReferencedObject<Standalone<VectorRef<ClientVersionRef>>>()), runLoopProfilingEnabled(false),
primaryClient(true) {}
static const Key CLIENT_LATENCY_INFO_PREFIX = LiteralStringRef("client_latency/");
static const Key CLIENT_LATENCY_INFO_CTR_PREFIX = LiteralStringRef("client_latency_counter/");
void DatabaseContext::addTssMapping(StorageServerInterface const& ssi, StorageServerInterface const& tssi) {
auto result = tssMapping.find(ssi.id());
// Update tss endpoint mapping if ss isn't in mapping, or the interface it mapped to changed
if (result == tssMapping.end() ||
result->second.getValue.getEndpoint().token.first() != tssi.getValue.getEndpoint().token.first()) {
Reference<TSSMetrics> metrics;
if (result == tssMapping.end()) {
// new TSS pairing
metrics = makeReference<TSSMetrics>();
tssMetrics[tssi.id()] = metrics;
tssMapping[ssi.id()] = tssi;
} else {
if (result->second.id() == tssi.id()) {
metrics = tssMetrics[tssi.id()];
} else {
TEST(true); // SS now maps to new TSS! This will probably never happen in practice
tssMetrics.erase(result->second.id());
metrics = makeReference<TSSMetrics>();
tssMetrics[tssi.id()] = metrics;
}
result->second = tssi;
}
// data requests duplicated for load and data comparison
queueModel.updateTssEndpoint(ssi.getValue.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.getValue.getEndpoint(), metrics));
queueModel.updateTssEndpoint(ssi.getKey.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.getKey.getEndpoint(), metrics));
queueModel.updateTssEndpoint(ssi.getKeyValues.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.getKeyValues.getEndpoint(), metrics));
queueModel.updateTssEndpoint(ssi.getKeyValuesAndFlatMap.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.getKeyValuesAndFlatMap.getEndpoint(), metrics));
queueModel.updateTssEndpoint(ssi.getKeyValuesStream.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.getKeyValuesStream.getEndpoint(), metrics));
// non-data requests duplicated for load
queueModel.updateTssEndpoint(ssi.watchValue.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.watchValue.getEndpoint(), metrics));
queueModel.updateTssEndpoint(ssi.splitMetrics.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.splitMetrics.getEndpoint(), metrics));
queueModel.updateTssEndpoint(ssi.getReadHotRanges.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.getReadHotRanges.getEndpoint(), metrics));
queueModel.updateTssEndpoint(ssi.getRangeSplitPoints.getEndpoint().token.first(),
TSSEndpointData(tssi.id(), tssi.getRangeSplitPoints.getEndpoint(), metrics));
}
}
void DatabaseContext::removeTssMapping(StorageServerInterface const& ssi) {
auto result = tssMapping.find(ssi.id());
if (result != tssMapping.end()) {
tssMetrics.erase(ssi.id());
tssMapping.erase(result);
queueModel.removeTssEndpoint(ssi.getValue.getEndpoint().token.first());
queueModel.removeTssEndpoint(ssi.getKey.getEndpoint().token.first());
queueModel.removeTssEndpoint(ssi.getKeyValues.getEndpoint().token.first());
queueModel.removeTssEndpoint(ssi.getKeyValuesAndFlatMap.getEndpoint().token.first());
queueModel.removeTssEndpoint(ssi.getKeyValuesStream.getEndpoint().token.first());
queueModel.removeTssEndpoint(ssi.watchValue.getEndpoint().token.first());
queueModel.removeTssEndpoint(ssi.splitMetrics.getEndpoint().token.first());
queueModel.removeTssEndpoint(ssi.getReadHotRanges.getEndpoint().token.first());
queueModel.removeTssEndpoint(ssi.getRangeSplitPoints.getEndpoint().token.first());
}
}
Reference<StorageServerInfo> StorageServerInfo::getInterface(DatabaseContext* cx,
StorageServerInterface const& ssi,
LocalityData const& locality) {
auto it = cx->server_interf.find(ssi.id());
if (it != cx->server_interf.end()) {
if (it->second->interf.getValue.getEndpoint().token != ssi.getValue.getEndpoint().token) {
if (it->second->interf.locality == ssi.locality) {
// FIXME: load balance holds pointers to individual members of the interface, and this assignment will
// swap out the object they are
// pointing to. This is technically correct, but is very unnatural. We may want to refactor load
// balance to take an AsyncVar<Reference<Interface>> so that it is notified when the interface
// changes.
it->second->interf = ssi;
} else {
it->second->notifyContextDestroyed();
Reference<StorageServerInfo> loc(new StorageServerInfo(cx, ssi, locality));
cx->server_interf[ssi.id()] = loc.getPtr();
return loc;
}
}
return Reference<StorageServerInfo>::addRef(it->second);
}
Reference<StorageServerInfo> loc(new StorageServerInfo(cx, ssi, locality));
cx->server_interf[ssi.id()] = loc.getPtr();
return loc;
}
void StorageServerInfo::notifyContextDestroyed() {
cx = nullptr;
}
StorageServerInfo::~StorageServerInfo() {
if (cx) {
auto it = cx->server_interf.find(interf.id());
if (it != cx->server_interf.end())
cx->server_interf.erase(it);
cx = nullptr;
}
}
std::string printable(const VectorRef<KeyValueRef>& val) {
std::string s;
for (int i = 0; i < val.size(); i++)
s = s + printable(val[i].key) + format(":%d ", val[i].value.size());
return s;
}
std::string printable(const KeyValueRef& val) {
return printable(val.key) + format(":%d ", val.value.size());
}
std::string printable(const VectorRef<StringRef>& val) {
std::string s;
for (int i = 0; i < val.size(); i++)
s = s + printable(val[i]) + " ";
return s;
}
std::string printable(const StringRef& val) {
return val.printable();
}
std::string printable(const std::string& str) {
return StringRef(str).printable();
}
std::string printable(const KeyRangeRef& range) {
return printable(range.begin) + " - " + printable(range.end);
}
std::string printable(const VectorRef<KeyRangeRef>& val) {
std::string s;
for (int i = 0; i < val.size(); i++)
s = s + printable(val[i]) + " ";
return s;
}
int unhex(char c) {
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
UNREACHABLE();
}
std::string unprintable(std::string const& val) {
std::string s;
for (int i = 0; i < val.size(); i++) {
char c = val[i];
if (c == '\\') {
if (++i == val.size())
ASSERT(false);
if (val[i] == '\\') {
s += '\\';
} else if (val[i] == 'x') {
if (i + 2 >= val.size())
ASSERT(false);
s += char((unhex(val[i + 1]) << 4) + unhex(val[i + 2]));
i += 2;
} else
ASSERT(false);
} else
s += c;
}
return s;
}
void DatabaseContext::validateVersion(Version version) const {
// Version could be 0 if the INITIALIZE_NEW_DATABASE option is set. In that case, it is illegal to perform any
// reads. We throw client_invalid_operation because the caller didn't directly set the version, so the
// version_invalid error might be confusing.
if (version == 0) {
throw client_invalid_operation();
}
if (switchable && version < minAcceptableReadVersion) {
TEST(true); // Attempted to read a version lower than any this client has seen from the current cluster
throw transaction_too_old();
}
ASSERT(version > 0 || version == latestVersion);
}
void validateOptionValuePresent(Optional<StringRef> value) {
if (!value.present()) {
throw invalid_option_value();
}
}
void validateOptionValueNotPresent(Optional<StringRef> value) {
if (value.present() && value.get().size() > 0) {
throw invalid_option_value();
}
}
void dumpMutations(const MutationListRef& mutations) {
for (auto m = mutations.begin(); m; ++m) {
switch (m->type) {
case MutationRef::SetValue:
printf(" '%s' := '%s'\n", printable(m->param1).c_str(), printable(m->param2).c_str());
break;
case MutationRef::AddValue:
printf(" '%s' += '%s'", printable(m->param1).c_str(), printable(m->param2).c_str());
break;
case MutationRef::ClearRange:
printf(" Clear ['%s','%s')\n", printable(m->param1).c_str(), printable(m->param2).c_str());
break;
default:
printf(" Unknown mutation %d('%s','%s')\n",
m->type,
printable(m->param1).c_str(),
printable(m->param2).c_str());
break;
}
}
}
template <>
void addref(DatabaseContext* ptr) {
ptr->addref();
}
template <>
void delref(DatabaseContext* ptr) {
ptr->delref();
}
void traceTSSErrors(const char* name, UID tssId, const std::unordered_map<int, uint64_t>& errorsByCode) {
TraceEvent ev(name, tssId);
for (auto& it : errorsByCode) {
ev.detail("E" + std::to_string(it.first), it.second);
}
}
ACTOR Future<Void> databaseLogger(DatabaseContext* cx) {
state double lastLogged = 0;
loop {
wait(delay(CLIENT_KNOBS->SYSTEM_MONITOR_INTERVAL, TaskPriority::FlushTrace));
if (!g_network->isSimulated()) {
TraceEvent ev("TransactionMetrics", cx->dbId);
ev.detail("Elapsed", (lastLogged == 0) ? 0 : now() - lastLogged)
.detail("Cluster",
cx->getConnectionRecord()
? cx->getConnectionRecord()->getConnectionString().clusterKeyName().toString()
: "")
.detail("Internal", cx->internal);
cx->cc.logToTraceEvent(ev);
ev.detail("LocationCacheEntryCount", cx->locationCache.size());
ev.detail("MeanLatency", cx->latencies.mean())
.detail("MedianLatency", cx->latencies.median())
.detail("Latency90", cx->latencies.percentile(0.90))
.detail("Latency98", cx->latencies.percentile(0.98))
.detail("MaxLatency", cx->latencies.max())
.detail("MeanRowReadLatency", cx->readLatencies.mean())
.detail("MedianRowReadLatency", cx->readLatencies.median())
.detail("MaxRowReadLatency", cx->readLatencies.max())
.detail("MeanGRVLatency", cx->GRVLatencies.mean())
.detail("MedianGRVLatency", cx->GRVLatencies.median())
.detail("MaxGRVLatency", cx->GRVLatencies.max())
.detail("MeanCommitLatency", cx->commitLatencies.mean())
.detail("MedianCommitLatency", cx->commitLatencies.median())
.detail("MaxCommitLatency", cx->commitLatencies.max())
.detail("MeanMutationsPerCommit", cx->mutationsPerCommit.mean())
.detail("MedianMutationsPerCommit", cx->mutationsPerCommit.median())
.detail("MaxMutationsPerCommit", cx->mutationsPerCommit.max())
.detail("MeanBytesPerCommit", cx->bytesPerCommit.mean())
.detail("MedianBytesPerCommit", cx->bytesPerCommit.median())
.detail("MaxBytesPerCommit", cx->bytesPerCommit.max())
.detail("NumLocalityCacheEntries", cx->locationCache.size());
}
cx->latencies.clear();
cx->readLatencies.clear();
cx->GRVLatencies.clear();
cx->commitLatencies.clear();
cx->mutationsPerCommit.clear();
cx->bytesPerCommit.clear();
for (const auto& it : cx->tssMetrics) {
// TODO could skip this whole thing if tss if request counter is zero?
// That would potentially complicate elapsed calculation though
if (it.second->detailedMismatches.size()) {
cx->tssMismatchStream.send(
std::pair<UID, std::vector<DetailedTSSMismatch>>(it.first, it.second->detailedMismatches));
}
// do error histograms as separate event
if (it.second->ssErrorsByCode.size()) {
traceTSSErrors("TSS_SSErrors", it.first, it.second->ssErrorsByCode);
}
if (it.second->tssErrorsByCode.size()) {
traceTSSErrors("TSS_TSSErrors", it.first, it.second->tssErrorsByCode);
}
if (!g_network->isSimulated()) {
TraceEvent tssEv("TSSClientMetrics", cx->dbId);
tssEv.detail("TSSID", it.first)
.detail("Elapsed", (lastLogged == 0) ? 0 : now() - lastLogged)
.detail("Internal", cx->internal);
it.second->cc.logToTraceEvent(tssEv);
tssEv.detail("MeanSSGetValueLatency", it.second->SSgetValueLatency.mean())
.detail("MedianSSGetValueLatency", it.second->SSgetValueLatency.median())
.detail("SSGetValueLatency90", it.second->SSgetValueLatency.percentile(0.90))
.detail("SSGetValueLatency99", it.second->SSgetValueLatency.percentile(0.99));
tssEv.detail("MeanTSSGetValueLatency", it.second->TSSgetValueLatency.mean())
.detail("MedianTSSGetValueLatency", it.second->TSSgetValueLatency.median())
.detail("TSSGetValueLatency90", it.second->TSSgetValueLatency.percentile(0.90))
.detail("TSSGetValueLatency99", it.second->TSSgetValueLatency.percentile(0.99));
tssEv.detail("MeanSSGetKeyLatency", it.second->SSgetKeyLatency.mean())
.detail("MedianSSGetKeyLatency", it.second->SSgetKeyLatency.median())
.detail("SSGetKeyLatency90", it.second->SSgetKeyLatency.percentile(0.90))
.detail("SSGetKeyLatency99", it.second->SSgetKeyLatency.percentile(0.99));
tssEv.detail("MeanTSSGetKeyLatency", it.second->TSSgetKeyLatency.mean())
.detail("MedianTSSGetKeyLatency", it.second->TSSgetKeyLatency.median())
.detail("TSSGetKeyLatency90", it.second->TSSgetKeyLatency.percentile(0.90))
.detail("TSSGetKeyLatency99", it.second->TSSgetKeyLatency.percentile(0.99));
tssEv.detail("MeanSSGetKeyValuesLatency", it.second->SSgetKeyValuesLatency.mean())
.detail("MedianSSGetKeyValuesLatency", it.second->SSgetKeyValuesLatency.median())
.detail("SSGetKeyValuesLatency90", it.second->SSgetKeyValuesLatency.percentile(0.90))
.detail("SSGetKeyValuesLatency99", it.second->SSgetKeyValuesLatency.percentile(0.99));
tssEv.detail("MeanTSSGetKeyValuesLatency", it.second->TSSgetKeyValuesLatency.mean())
.detail("MedianTSSGetKeyValuesLatency", it.second->TSSgetKeyValuesLatency.median())
.detail("TSSGetKeyValuesLatency90", it.second->TSSgetKeyValuesLatency.percentile(0.90))
.detail("TSSGetKeyValuesLatency99", it.second->TSSgetKeyValuesLatency.percentile(0.99));
}
it.second->clear();
}
lastLogged = now();
}
}
struct TrInfoChunk {
ValueRef value;
Key key;
};
ACTOR static Future<Void> transactionInfoCommitActor(Transaction* tr, std::vector<TrInfoChunk>* chunks) {
state const Key clientLatencyAtomicCtr = CLIENT_LATENCY_INFO_CTR_PREFIX.withPrefix(fdbClientInfoPrefixRange.begin);
state int retryCount = 0;
loop {
try {
tr->reset();
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state Future<Standalone<StringRef>> vstamp = tr->getVersionstamp();
int64_t numCommitBytes = 0;
for (auto& chunk : *chunks) {
tr->atomicOp(chunk.key, chunk.value, MutationRef::SetVersionstampedKey);
numCommitBytes += chunk.key.size() + chunk.value.size() -
4; // subtract number of bytes of key that denotes verstion stamp index
}
tr->atomicOp(clientLatencyAtomicCtr, StringRef((uint8_t*)&numCommitBytes, 8), MutationRef::AddValue);
wait(tr->commit());
return Void();
} catch (Error& e) {
retryCount++;
if (retryCount == 10)
throw;
wait(tr->onError(e));
}
}
}
ACTOR static Future<Void> delExcessClntTxnEntriesActor(Transaction* tr, int64_t clientTxInfoSizeLimit) {
state const Key clientLatencyName = CLIENT_LATENCY_INFO_PREFIX.withPrefix(fdbClientInfoPrefixRange.begin);
state const Key clientLatencyAtomicCtr = CLIENT_LATENCY_INFO_CTR_PREFIX.withPrefix(fdbClientInfoPrefixRange.begin);
TraceEvent(SevInfo, "DelExcessClntTxnEntriesCalled").log();
loop {
try {
tr->reset();
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
Optional<Value> ctrValue = wait(tr->get(KeyRef(clientLatencyAtomicCtr), Snapshot::True));
if (!ctrValue.present()) {
TraceEvent(SevInfo, "NumClntTxnEntriesNotFound").log();
return Void();
}
state int64_t txInfoSize = 0;
ASSERT(ctrValue.get().size() == sizeof(int64_t));
memcpy(&txInfoSize, ctrValue.get().begin(), ctrValue.get().size());
if (txInfoSize < clientTxInfoSizeLimit)
return Void();
int getRangeByteLimit = (txInfoSize - clientTxInfoSizeLimit) < CLIENT_KNOBS->TRANSACTION_SIZE_LIMIT
? (txInfoSize - clientTxInfoSizeLimit)
: CLIENT_KNOBS->TRANSACTION_SIZE_LIMIT;
GetRangeLimits limit(GetRangeLimits::ROW_LIMIT_UNLIMITED, getRangeByteLimit);
RangeResult txEntries =
wait(tr->getRange(KeyRangeRef(clientLatencyName, strinc(clientLatencyName)), limit));
state int64_t numBytesToDel = 0;
KeyRef endKey;
for (auto& kv : txEntries) {
endKey = kv.key;
numBytesToDel += kv.key.size() + kv.value.size();
if (txInfoSize - numBytesToDel <= clientTxInfoSizeLimit)
break;
}
if (numBytesToDel) {
tr->clear(KeyRangeRef(txEntries[0].key, strinc(endKey)));
TraceEvent(SevInfo, "DeletingExcessCntTxnEntries").detail("BytesToBeDeleted", numBytesToDel);
int64_t bytesDel = -numBytesToDel;
tr->atomicOp(clientLatencyAtomicCtr, StringRef((uint8_t*)&bytesDel, 8), MutationRef::AddValue);
wait(tr->commit());
}
if (txInfoSize - numBytesToDel <= clientTxInfoSizeLimit)
return Void();
} catch (Error& e) {
wait(tr->onError(e));
}
}
}
// Delref and addref self to give self a chance to get destroyed.
ACTOR static Future<Void> refreshTransaction(DatabaseContext* self, Transaction* tr) {
*tr = Transaction();
wait(delay(0)); // Give ourselves the chance to get cancelled if self was destroyed
*tr = Transaction(Database(Reference<DatabaseContext>::addRef(self)));
return Void();
}
// The reason for getting a pointer to DatabaseContext instead of a reference counted object is because reference
// counting will increment reference count for DatabaseContext which holds the future of this actor. This creates a
// cyclic reference and hence this actor and Database object will not be destroyed at all.
ACTOR static Future<Void> clientStatusUpdateActor(DatabaseContext* cx) {
state const std::string clientLatencyName =
CLIENT_LATENCY_INFO_PREFIX.withPrefix(fdbClientInfoPrefixRange.begin).toString();
state Transaction tr;
state std::vector<TrInfoChunk> commitQ;
state int txBytes = 0;
loop {
// Need to make sure that we eventually destroy tr. We can't rely on getting cancelled to do this because of
// the cyclic reference to self.
wait(refreshTransaction(cx, &tr));
try {
ASSERT(cx->clientStatusUpdater.outStatusQ.empty());
cx->clientStatusUpdater.inStatusQ.swap(cx->clientStatusUpdater.outStatusQ);
// Split Transaction Info into chunks
state std::vector<TrInfoChunk> trChunksQ;
for (auto& entry : cx->clientStatusUpdater.outStatusQ) {
auto& bw = entry.second;
int64_t value_size_limit = BUGGIFY
? deterministicRandom()->randomInt(1e3, CLIENT_KNOBS->VALUE_SIZE_LIMIT)
: CLIENT_KNOBS->VALUE_SIZE_LIMIT;
int num_chunks = (bw.getLength() + value_size_limit - 1) / value_size_limit;
std::string random_id = deterministicRandom()->randomAlphaNumeric(16);
std::string user_provided_id = entry.first.size() ? entry.first + "/" : "";
for (int i = 0; i < num_chunks; i++) {
TrInfoChunk chunk;
BinaryWriter chunkBW(Unversioned());
chunkBW << bigEndian32(i + 1) << bigEndian32(num_chunks);
chunk.key = KeyRef(clientLatencyName + std::string(10, '\x00') + "/" + random_id + "/" +
chunkBW.toValue().toString() + "/" + user_provided_id + std::string(4, '\x00'));
int32_t pos = littleEndian32(clientLatencyName.size());
memcpy(mutateString(chunk.key) + chunk.key.size() - sizeof(int32_t), &pos, sizeof(int32_t));
if (i == num_chunks - 1) {
chunk.value = ValueRef(static_cast<uint8_t*>(bw.getData()) + (i * value_size_limit),
bw.getLength() - (i * value_size_limit));
} else {
chunk.value =
ValueRef(static_cast<uint8_t*>(bw.getData()) + (i * value_size_limit), value_size_limit);
}
trChunksQ.push_back(std::move(chunk));
}
}
// Commit the chunks splitting into different transactions if needed
state int64_t dataSizeLimit =
BUGGIFY ? deterministicRandom()->randomInt(200e3, 1.5 * CLIENT_KNOBS->TRANSACTION_SIZE_LIMIT)
: 0.8 * CLIENT_KNOBS->TRANSACTION_SIZE_LIMIT;
state std::vector<TrInfoChunk>::iterator tracking_iter = trChunksQ.begin();
ASSERT(commitQ.empty() && (txBytes == 0));
loop {
state std::vector<TrInfoChunk>::iterator iter = tracking_iter;
txBytes = 0;
commitQ.clear();
try {
while (iter != trChunksQ.end()) {
if (iter->value.size() + iter->key.size() + txBytes > dataSizeLimit) {
wait(transactionInfoCommitActor(&tr, &commitQ));
tracking_iter = iter;
commitQ.clear();
txBytes = 0;
}
commitQ.push_back(*iter);
txBytes += iter->value.size() + iter->key.size();
++iter;
}
if (!commitQ.empty()) {
wait(transactionInfoCommitActor(&tr, &commitQ));
commitQ.clear();
txBytes = 0;
}
break;
} catch (Error& e) {
if (e.code() == error_code_transaction_too_large) {
dataSizeLimit /= 2;
ASSERT(dataSizeLimit >= CLIENT_KNOBS->VALUE_SIZE_LIMIT + CLIENT_KNOBS->KEY_SIZE_LIMIT);
} else {
TraceEvent(SevWarnAlways, "ClientTrInfoErrorCommit").error(e).detail("TxBytes", txBytes);
commitQ.clear();
txBytes = 0;
throw;
}
}
}
cx->clientStatusUpdater.outStatusQ.clear();
wait(GlobalConfig::globalConfig().onInitialized());
double sampleRate = GlobalConfig::globalConfig().get<double>(fdbClientInfoTxnSampleRate,
std::numeric_limits<double>::infinity());
double clientSamplingProbability =
std::isinf(sampleRate) ? CLIENT_KNOBS->CSI_SAMPLING_PROBABILITY : sampleRate;
int64_t sizeLimit = GlobalConfig::globalConfig().get<int64_t>(fdbClientInfoTxnSizeLimit, -1);
int64_t clientTxnInfoSizeLimit = sizeLimit == -1 ? CLIENT_KNOBS->CSI_SIZE_LIMIT : sizeLimit;
if (!trChunksQ.empty() && deterministicRandom()->random01() < clientSamplingProbability)
wait(delExcessClntTxnEntriesActor(&tr, clientTxnInfoSizeLimit));
wait(delay(CLIENT_KNOBS->CSI_STATUS_DELAY));
} catch (Error& e) {
if (e.code() == error_code_actor_cancelled) {
throw;
}
cx->clientStatusUpdater.outStatusQ.clear();
TraceEvent(SevWarnAlways, "UnableToWriteClientStatus").error(e);
wait(delay(10.0));
}
}
}
ACTOR Future<Void> assertFailure(GrvProxyInterface remote, Future<ErrorOr<GetReadVersionReply>> reply) {
try {
ErrorOr<GetReadVersionReply> res = wait(reply);
if (!res.isError()) {
TraceEvent(SevError, "GotStaleReadVersion")
.detail("Remote", remote.getConsistentReadVersion.getEndpoint().addresses.address.toString())
.detail("Provisional", remote.provisional)
.detail("ReadVersion", res.get().version);
ASSERT_WE_THINK(false);
}
} catch (Error& e) {
if (e.code() == error_code_actor_cancelled) {
throw;
}
// we want this to fail -- so getting here is good, we'll just ignore the error.
}
return Void();
}
Future<Void> attemptGRVFromOldProxies(std::vector<GrvProxyInterface> oldProxies,
std::vector<GrvProxyInterface> newProxies) {
Span span(deterministicRandom()->randomUniqueID(), "VerifyCausalReadRisky"_loc);
std::vector<Future<Void>> replies;
replies.reserve(oldProxies.size());
GetReadVersionRequest req(
span.context, 1, TransactionPriority::IMMEDIATE, GetReadVersionRequest::FLAG_CAUSAL_READ_RISKY);
TraceEvent evt("AttemptGRVFromOldProxies");
evt.detail("NumOldProxies", oldProxies.size()).detail("NumNewProxies", newProxies.size());
auto traceProxies = [&](std::vector<GrvProxyInterface>& proxies, std::string const& key) {
for (int i = 0; i < proxies.size(); ++i) {
auto k = key + std::to_string(i);
evt.detail(k.c_str(), proxies[i].id());
}
};
traceProxies(oldProxies, "OldProxy"s);
traceProxies(newProxies, "NewProxy"s);
evt.log();
for (auto& i : oldProxies) {
req.reply = ReplyPromise<GetReadVersionReply>();
replies.push_back(assertFailure(i, i.getConsistentReadVersion.tryGetReply(req)));
}
return waitForAll(replies);
}
ACTOR static Future<Void> monitorClientDBInfoChange(DatabaseContext* cx,
Reference<AsyncVar<ClientDBInfo> const> clientDBInfo,
AsyncTrigger* proxyChangeTrigger) {
state std::vector<CommitProxyInterface> curCommitProxies;
state std::vector<GrvProxyInterface> curGrvProxies;
state ActorCollection actors(false);
curCommitProxies = clientDBInfo->get().commitProxies;
curGrvProxies = clientDBInfo->get().grvProxies;
loop {
choose {
when(wait(clientDBInfo->onChange())) {
if (clientDBInfo->get().commitProxies != curCommitProxies ||
clientDBInfo->get().grvProxies != curGrvProxies) {
// This condition is a bit complicated. Here we want to verify that we're unable to receive a read
// version from a proxy of an old generation after a successful recovery. The conditions are:
// 1. We only do this with a configured probability.
// 2. If the old set of Grv proxies is empty, there's nothing to do
// 3. If the new set of Grv proxies is empty, it means the recovery is not complete. So if an old
// Grv proxy still gives out read versions, this would be correct behavior.
// 4. If we see a provisional proxy, it means the recovery didn't complete yet, so the same as (3)
// applies.
if (deterministicRandom()->random01() < cx->verifyCausalReadsProp && !curGrvProxies.empty() &&
!clientDBInfo->get().grvProxies.empty() && !clientDBInfo->get().grvProxies[0].provisional) {
actors.add(attemptGRVFromOldProxies(curGrvProxies, clientDBInfo->get().grvProxies));
}
curCommitProxies = clientDBInfo->get().commitProxies;
curGrvProxies = clientDBInfo->get().grvProxies;
proxyChangeTrigger->trigger();
}
}
when(wait(actors.getResult())) { UNSTOPPABLE_ASSERT(false); }
}
}
}
void updateLocationCacheWithCaches(DatabaseContext* self,
const std::map<UID, StorageServerInterface>& removed,
const std::map<UID, StorageServerInterface>& added) {
// TODO: this needs to be more clever in the future
auto ranges = self->locationCache.ranges();
for (auto iter = ranges.begin(); iter != ranges.end(); ++iter) {
if (iter->value() && iter->value()->hasCaches) {
auto& val = iter->value();
std::vector<Reference<ReferencedInterface<StorageServerInterface>>> interfaces;
interfaces.reserve(val->size() - removed.size() + added.size());
for (int i = 0; i < val->size(); ++i) {
const auto& interf = (*val)[i];
if (removed.count(interf->interf.id()) == 0) {
interfaces.emplace_back(interf);
}
}
for (const auto& p : added) {
interfaces.push_back(makeReference<ReferencedInterface<StorageServerInterface>>(p.second));
}
iter->value() = makeReference<LocationInfo>(interfaces, true);
}
}
}
Reference<LocationInfo> addCaches(const Reference<LocationInfo>& loc,
const std::vector<Reference<ReferencedInterface<StorageServerInterface>>>& other) {
std::vector<Reference<ReferencedInterface<StorageServerInterface>>> interfaces;
interfaces.reserve(loc->size() + other.size());
for (int i = 0; i < loc->size(); ++i) {
interfaces.emplace_back((*loc)[i]);
}
interfaces.insert(interfaces.end(), other.begin(), other.end());
return makeReference<LocationInfo>(interfaces, true);
}
ACTOR Future<Void> updateCachedRanges(DatabaseContext* self, std::map<UID, StorageServerInterface>* cacheServers) {
state Transaction tr;
state Value trueValue = storageCacheValue(std::vector<uint16_t>{ 0 });
state Value falseValue = storageCacheValue(std::vector<uint16_t>{});
try {
loop {
// Need to make sure that we eventually destroy tr. We can't rely on getting cancelled to do this because of
// the cyclic reference to self.
tr = Transaction();
wait(delay(0)); // Give ourselves the chance to get cancelled if self was destroyed
wait(brokenPromiseToNever(self->updateCache.onTrigger())); // brokenPromiseToNever because self might get
// destroyed elsewhere while we're waiting here.
tr = Transaction(Database(Reference<DatabaseContext>::addRef(self)));
tr.setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr.setOption(FDBTransactionOptions::READ_LOCK_AWARE);
try {
RangeResult range = wait(tr.getRange(storageCacheKeys, CLIENT_KNOBS->TOO_MANY));
ASSERT(!range.more);
std::vector<Reference<ReferencedInterface<StorageServerInterface>>> cacheInterfaces;
cacheInterfaces.reserve(cacheServers->size());
for (const auto& p : *cacheServers) {
cacheInterfaces.push_back(makeReference<ReferencedInterface<StorageServerInterface>>(p.second));
}
bool currCached = false;
KeyRef begin, end;
for (const auto& kv : range) {
// These booleans have to flip consistently
ASSERT(currCached == (kv.value == falseValue));
if (kv.value == trueValue) {
begin = kv.key.substr(storageCacheKeys.begin.size());
currCached = true;
} else {
currCached = false;
end = kv.key.substr(storageCacheKeys.begin.size());
KeyRangeRef cachedRange{ begin, end };
auto ranges = self->locationCache.containedRanges(cachedRange);
KeyRef containedRangesBegin, containedRangesEnd, prevKey;
if (!ranges.empty()) {
containedRangesBegin = ranges.begin().range().begin;
}
for (auto iter = ranges.begin(); iter != ranges.end(); ++iter) {
containedRangesEnd = iter->range().end;
if (iter->value() && !iter->value()->hasCaches) {
iter->value() = addCaches(iter->value(), cacheInterfaces);
}
}
auto iter = self->locationCache.rangeContaining(begin);
if (iter->value() && !iter->value()->hasCaches) {
if (end >= iter->range().end) {
Key endCopy = iter->range().end; // Copy because insertion invalidates iterator
self->locationCache.insert(KeyRangeRef{ begin, endCopy },
addCaches(iter->value(), cacheInterfaces));
} else {
self->locationCache.insert(KeyRangeRef{ begin, end },
addCaches(iter->value(), cacheInterfaces));
}
}
iter = self->locationCache.rangeContainingKeyBefore(end);
if (iter->value() && !iter->value()->hasCaches) {
Key beginCopy = iter->range().begin; // Copy because insertion invalidates iterator
self->locationCache.insert(KeyRangeRef{ beginCopy, end },
addCaches(iter->value(), cacheInterfaces));
}
}
}
wait(delay(2.0)); // we want to wait at least some small amount of time before
// updating this list again
} catch (Error& e) {
wait(tr.onError(e));
}
}
} catch (Error& e) {
TraceEvent(SevError, "UpdateCachedRangesFailed").error(e);
throw;
}
}
// The reason for getting a pointer to DatabaseContext instead of a reference counted object is because reference
// counting will increment reference count for DatabaseContext which holds the future of this actor. This creates a
// cyclic reference and hence this actor and Database object will not be destroyed at all.
ACTOR Future<Void> monitorCacheList(DatabaseContext* self) {
state Transaction tr;
state std::map<UID, StorageServerInterface> cacheServerMap;
state Future<Void> updateRanges = updateCachedRanges(self, &cacheServerMap);
// if no caches are configured, we don't want to run this actor at all
// so we just wait for the first trigger from a storage server
wait(self->updateCache.onTrigger());
try {
loop {
// Need to make sure that we eventually destroy tr. We can't rely on getting cancelled to do this because of
// the cyclic reference to self.
wait(refreshTransaction(self, &tr));
try {
RangeResult cacheList = wait(tr.getRange(storageCacheServerKeys, CLIENT_KNOBS->TOO_MANY));
ASSERT(!cacheList.more);
bool hasChanges = false;
std::map<UID, StorageServerInterface> allCacheServers;
for (auto kv : cacheList) {
auto ssi = BinaryReader::fromStringRef<StorageServerInterface>(kv.value, IncludeVersion());
allCacheServers.emplace(ssi.id(), ssi);
}
std::map<UID, StorageServerInterface> newCacheServers;
std::map<UID, StorageServerInterface> deletedCacheServers;
std::set_difference(allCacheServers.begin(),
allCacheServers.end(),
cacheServerMap.begin(),
cacheServerMap.end(),
std::insert_iterator<std::map<UID, StorageServerInterface>>(
newCacheServers, newCacheServers.begin()));
std::set_difference(cacheServerMap.begin(),
cacheServerMap.end(),
allCacheServers.begin(),
allCacheServers.end(),
std::insert_iterator<std::map<UID, StorageServerInterface>>(
deletedCacheServers, deletedCacheServers.begin()));
hasChanges = !(newCacheServers.empty() && deletedCacheServers.empty());
if (hasChanges) {
updateLocationCacheWithCaches(self, deletedCacheServers, newCacheServers);
}
cacheServerMap = std::move(allCacheServers);
wait(delay(5.0));
} catch (Error& e) {
wait(tr.onError(e));
}
}
} catch (Error& e) {
TraceEvent(SevError, "MonitorCacheListFailed").error(e);
throw;
}
}
ACTOR static Future<Void> handleTssMismatches(DatabaseContext* cx) {
state Reference<ReadYourWritesTransaction> tr;
state KeyBackedMap<UID, UID> tssMapDB = KeyBackedMap<UID, UID>(tssMappingKeys.begin);
state KeyBackedMap<Tuple, std::string> tssMismatchDB = KeyBackedMap<Tuple, std::string>(tssMismatchKeys.begin);
loop {
// <tssid, list of detailed mismatch data>
state std::pair<UID, std::vector<DetailedTSSMismatch>> data = waitNext(cx->tssMismatchStream.getFuture());
// return to calling actor, don't do this as part of metrics loop
wait(delay(0));
// find ss pair id so we can remove it from the mapping
state UID tssPairID;
bool found = false;
for (const auto& it : cx->tssMapping) {
if (it.second.id() == data.first) {
tssPairID = it.first;
found = true;
break;
}
}
if (found) {
state bool quarantine = CLIENT_KNOBS->QUARANTINE_TSS_ON_MISMATCH;
TraceEvent(SevWarnAlways, quarantine ? "TSS_QuarantineMismatch" : "TSS_KillMismatch")
.detail("TSSID", data.first.toString());
TEST(quarantine); // Quarantining TSS because it got mismatch
TEST(!quarantine); // Killing TSS because it got mismatch
tr = makeReference<ReadYourWritesTransaction>(Database(Reference<DatabaseContext>::addRef(cx)));
state int tries = 0;
loop {
try {
tr->setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
if (quarantine) {
tr->set(tssQuarantineKeyFor(data.first), LiteralStringRef(""));
} else {
tr->clear(serverTagKeyFor(data.first));
}
tssMapDB.erase(tr, tssPairID);
for (const DetailedTSSMismatch& d : data.second) {
// <tssid, time, mismatchid> -> mismatch data
tssMismatchDB.set(
tr,
Tuple().append(data.first.toString()).append(d.timestamp).append(d.mismatchId.toString()),
d.traceString);
}
wait(tr->commit());
break;
} catch (Error& e) {
wait(tr->onError(e));
}
tries++;
if (tries > 10) {
// Give up, it'll get another mismatch or a human will investigate eventually
TraceEvent("TSS_MismatchGaveUp").detail("TSSID", data.first.toString());
break;
}
}
// clear out txn so that the extra DatabaseContext ref gets decref'd and we can free cx
tr = makeReference<ReadYourWritesTransaction>();
} else {
TEST(true); // Not handling TSS with mismatch because it's already gone
}
}
}
ACTOR static Future<HealthMetrics> getHealthMetricsActor(DatabaseContext* cx, bool detailed) {
if (now() - cx->healthMetricsLastUpdated < CLIENT_KNOBS->AGGREGATE_HEALTH_METRICS_MAX_STALENESS) {
if (detailed) {
return cx->healthMetrics;
} else {
HealthMetrics result;
result.update(cx->healthMetrics, false, false);
return result;
}
}
state bool sendDetailedRequest =
detailed && now() - cx->detailedHealthMetricsLastUpdated > CLIENT_KNOBS->DETAILED_HEALTH_METRICS_MAX_STALENESS;
loop {
choose {
when(wait(cx->onProxiesChanged())) {}
when(GetHealthMetricsReply rep = wait(basicLoadBalance(cx->getGrvProxies(UseProvisionalProxies::False),
&GrvProxyInterface::getHealthMetrics,
GetHealthMetricsRequest(sendDetailedRequest)))) {
cx->healthMetrics.update(rep.healthMetrics, detailed, true);
if (detailed) {
cx->healthMetricsLastUpdated = now();
cx->detailedHealthMetricsLastUpdated = now();
return cx->healthMetrics;
} else {
cx->healthMetricsLastUpdated = now();
HealthMetrics result;
result.update(cx->healthMetrics, false, false);
return result;
}
}
}
}
}
Future<HealthMetrics> DatabaseContext::getHealthMetrics(bool detailed = false) {
return getHealthMetricsActor(this, detailed);
}
void DatabaseContext::registerSpecialKeySpaceModule(SpecialKeySpace::MODULE module,
SpecialKeySpace::IMPLTYPE type,
std::unique_ptr<SpecialKeyRangeReadImpl>&& impl) {
specialKeySpace->registerKeyRange(module, type, impl->getKeyRange(), impl.get());
specialKeySpaceModules.push_back(std::move(impl));
}
ACTOR Future<RangeResult> getWorkerInterfaces(Reference<IClusterConnectionRecord> clusterRecord);
ACTOR Future<Optional<Value>> getJSON(Database db);
struct WorkerInterfacesSpecialKeyImpl : SpecialKeyRangeReadImpl {
Future<RangeResult> getRange(ReadYourWritesTransaction* ryw, KeyRangeRef kr) const override {
if (ryw->getDatabase().getPtr() && ryw->getDatabase()->getConnectionRecord()) {
Key prefix = Key(getKeyRange().begin);
return map(getWorkerInterfaces(ryw->getDatabase()->getConnectionRecord()),
[prefix = prefix, kr = KeyRange(kr)](const RangeResult& in) {
RangeResult result;
for (const auto& [k_, v] : in) {
auto k = k_.withPrefix(prefix);
if (kr.contains(k))
result.push_back_deep(result.arena(), KeyValueRef(k, v));
}
std::sort(result.begin(), result.end(), KeyValueRef::OrderByKey{});
return result;
});
} else {
return RangeResult();
}
}
explicit WorkerInterfacesSpecialKeyImpl(KeyRangeRef kr) : SpecialKeyRangeReadImpl(kr) {}
};
struct SingleSpecialKeyImpl : SpecialKeyRangeReadImpl {
Future<RangeResult> getRange(ReadYourWritesTransaction* ryw, KeyRangeRef kr) const override {
ASSERT(kr.contains(k));
return map(f(ryw), [k = k](Optional<Value> v) {
RangeResult result;
if (v.present()) {
result.push_back_deep(result.arena(), KeyValueRef(k, v.get()));
}
return result;
});
}
SingleSpecialKeyImpl(KeyRef k, const std::function<Future<Optional<Value>>(ReadYourWritesTransaction*)>& f)
: SpecialKeyRangeReadImpl(singleKeyRange(k)), k(k), f(f) {}
private:
Key k;
std::function<Future<Optional<Value>>(ReadYourWritesTransaction*)> f;
};
class HealthMetricsRangeImpl : public SpecialKeyRangeAsyncImpl {
public:
explicit HealthMetricsRangeImpl(KeyRangeRef kr);
Future<RangeResult> getRange(ReadYourWritesTransaction* ryw, KeyRangeRef kr) const override;
};
static RangeResult healthMetricsToKVPairs(const HealthMetrics& metrics, KeyRangeRef kr) {
RangeResult result;
if (CLIENT_BUGGIFY)
return result;
if (kr.contains(LiteralStringRef("\xff\xff/metrics/health/aggregate")) && metrics.worstStorageDurabilityLag != 0) {
json_spirit::mObject statsObj;
statsObj["batch_limited"] = metrics.batchLimited;
statsObj["tps_limit"] = metrics.tpsLimit;
statsObj["worst_storage_durability_lag"] = metrics.worstStorageDurabilityLag;
statsObj["limiting_storage_durability_lag"] = metrics.limitingStorageDurabilityLag;
statsObj["worst_storage_queue"] = metrics.worstStorageQueue;
statsObj["limiting_storage_queue"] = metrics.limitingStorageQueue;
statsObj["worst_log_queue"] = metrics.worstTLogQueue;
std::string statsString =
json_spirit::write_string(json_spirit::mValue(statsObj), json_spirit::Output_options::raw_utf8);
ValueRef bytes(result.arena(), statsString);
result.push_back(result.arena(), KeyValueRef(LiteralStringRef("\xff\xff/metrics/health/aggregate"), bytes));
}
// tlog stats
{
int phase = 0; // Avoid comparing twice per loop iteration
for (const auto& [uid, logStats] : metrics.tLogQueue) {
StringRef k{
StringRef(uid.toString()).withPrefix(LiteralStringRef("\xff\xff/metrics/health/log/"), result.arena())
};
if (phase == 0 && k >= kr.begin) {
phase = 1;
}
if (phase == 1) {
if (k < kr.end) {
json_spirit::mObject statsObj;
statsObj["log_queue"] = logStats;
std::string statsString =
json_spirit::write_string(json_spirit::mValue(statsObj), json_spirit::Output_options::raw_utf8);
ValueRef bytes(result.arena(), statsString);
result.push_back(result.arena(), KeyValueRef(k, bytes));
} else {
break;
}
}
}
}
// Storage stats
{
int phase = 0; // Avoid comparing twice per loop iteration
for (const auto& [uid, storageStats] : metrics.storageStats) {
StringRef k{ StringRef(uid.toString())
.withPrefix(LiteralStringRef("\xff\xff/metrics/health/storage/"), result.arena()) };
if (phase == 0 && k >= kr.begin) {
phase = 1;
}
if (phase == 1) {
if (k < kr.end) {
json_spirit::mObject statsObj;
statsObj["storage_durability_lag"] = storageStats.storageDurabilityLag;
statsObj["storage_queue"] = storageStats.storageQueue;
statsObj["cpu_usage"] = storageStats.cpuUsage;
statsObj["disk_usage"] = storageStats.diskUsage;
std::string statsString =
json_spirit::write_string(json_spirit::mValue(statsObj), json_spirit::Output_options::raw_utf8);
ValueRef bytes(result.arena(), statsString);
result.push_back(result.arena(), KeyValueRef(k, bytes));
} else {
break;
}
}
}
}
return result;
}
ACTOR static Future<RangeResult> healthMetricsGetRangeActor(ReadYourWritesTransaction* ryw, KeyRangeRef kr) {
HealthMetrics metrics = wait(ryw->getDatabase()->getHealthMetrics(
/*detailed ("per process")*/ kr.intersects(KeyRangeRef(LiteralStringRef("\xff\xff/metrics/health/storage/"),
LiteralStringRef("\xff\xff/metrics/health/storage0"))) ||
kr.intersects(KeyRangeRef(LiteralStringRef("\xff\xff/metrics/health/log/"),
LiteralStringRef("\xff\xff/metrics/health/log0")))));
return healthMetricsToKVPairs(metrics, kr);
}
HealthMetricsRangeImpl::HealthMetricsRangeImpl(KeyRangeRef kr) : SpecialKeyRangeAsyncImpl(kr) {}
Future<RangeResult> HealthMetricsRangeImpl::getRange(ReadYourWritesTransaction* ryw, KeyRangeRef kr) const {
return healthMetricsGetRangeActor(ryw, kr);
}
DatabaseContext::DatabaseContext(Reference<AsyncVar<Reference<IClusterConnectionRecord>>> connectionRecord,
Reference<AsyncVar<ClientDBInfo>> clientInfo,
Reference<AsyncVar<Optional<ClientLeaderRegInterface>> const> coordinator,
Future<Void> clientInfoMonitor,
TaskPriority taskID,
LocalityData const& clientLocality,
EnableLocalityLoadBalance enableLocalityLoadBalance,
LockAware lockAware,
IsInternal internal,
int apiVersion,
IsSwitchable switchable)
: lockAware(lockAware), switchable(switchable), connectionRecord(connectionRecord), proxyProvisional(false),
clientLocality(clientLocality), enableLocalityLoadBalance(enableLocalityLoadBalance), internal(internal),
cc("TransactionMetrics"), transactionReadVersions("ReadVersions", cc),
transactionReadVersionsThrottled("ReadVersionsThrottled", cc),
transactionReadVersionsCompleted("ReadVersionsCompleted", cc),
transactionReadVersionBatches("ReadVersionBatches", cc),
transactionBatchReadVersions("BatchPriorityReadVersions", cc),
transactionDefaultReadVersions("DefaultPriorityReadVersions", cc),
transactionImmediateReadVersions("ImmediatePriorityReadVersions", cc),
transactionBatchReadVersionsCompleted("BatchPriorityReadVersionsCompleted", cc),
transactionDefaultReadVersionsCompleted("DefaultPriorityReadVersionsCompleted", cc),
transactionImmediateReadVersionsCompleted("ImmediatePriorityReadVersionsCompleted", cc),
transactionLogicalReads("LogicalUncachedReads", cc), transactionPhysicalReads("PhysicalReadRequests", cc),
transactionPhysicalReadsCompleted("PhysicalReadRequestsCompleted", cc),
transactionGetKeyRequests("GetKeyRequests", cc), transactionGetValueRequests("GetValueRequests", cc),
transactionGetRangeRequests("GetRangeRequests", cc),
transactionGetRangeAndFlatMapRequests("GetRangeAndFlatMapRequests", cc),
transactionGetRangeStreamRequests("GetRangeStreamRequests", cc), transactionWatchRequests("WatchRequests", cc),
transactionGetAddressesForKeyRequests("GetAddressesForKeyRequests", cc), transactionBytesRead("BytesRead", cc),
transactionKeysRead("KeysRead", cc), transactionMetadataVersionReads("MetadataVersionReads", cc),
transactionCommittedMutations("CommittedMutations", cc),
transactionCommittedMutationBytes("CommittedMutationBytes", cc), transactionSetMutations("SetMutations", cc),
transactionClearMutations("ClearMutations", cc), transactionAtomicMutations("AtomicMutations", cc),
transactionsCommitStarted("CommitStarted", cc), transactionsCommitCompleted("CommitCompleted", cc),
transactionKeyServerLocationRequests("KeyServerLocationRequests", cc),
transactionKeyServerLocationRequestsCompleted("KeyServerLocationRequestsCompleted", cc),
transactionStatusRequests("StatusRequests", cc), transactionsTooOld("TooOld", cc),
transactionsFutureVersions("FutureVersions", cc), transactionsNotCommitted("NotCommitted", cc),
transactionsMaybeCommitted("MaybeCommitted", cc), transactionsResourceConstrained("ResourceConstrained", cc),
transactionsProcessBehind("ProcessBehind", cc), transactionsThrottled("Throttled", cc),
transactionsExpensiveClearCostEstCount("ExpensiveClearCostEstCount", cc),
transactionGrvFullBatches("NumGrvFullBatches", cc), transactionGrvTimedOutBatches("NumGrvTimedOutBatches", cc),
latencies(1000), readLatencies(1000), commitLatencies(1000), GRVLatencies(1000), mutationsPerCommit(1000),
bytesPerCommit(1000), outstandingWatches(0), transactionTracingSample(false), taskID(taskID),
clientInfo(clientInfo), clientInfoMonitor(clientInfoMonitor), coordinator(coordinator), apiVersion(apiVersion),
mvCacheInsertLocation(0), healthMetricsLastUpdated(0), detailedHealthMetricsLastUpdated(0),
smoothMidShardSize(CLIENT_KNOBS->SHARD_STAT_SMOOTH_AMOUNT),
specialKeySpace(std::make_unique<SpecialKeySpace>(specialKeys.begin, specialKeys.end, /* test */ false)),
connectToDatabaseEventCacheHolder(format("ConnectToDatabase/%s", dbId.toString().c_str())) {
dbId = deterministicRandom()->randomUniqueID();
connected = (clientInfo->get().commitProxies.size() && clientInfo->get().grvProxies.size())
? Void()
: clientInfo->onChange();
metadataVersionCache.resize(CLIENT_KNOBS->METADATA_VERSION_CACHE_SIZE);
maxOutstandingWatches = CLIENT_KNOBS->DEFAULT_MAX_OUTSTANDING_WATCHES;
snapshotRywEnabled = apiVersionAtLeast(300) ? 1 : 0;
logger = databaseLogger(this);
locationCacheSize = g_network->isSimulated() ? CLIENT_KNOBS->LOCATION_CACHE_EVICTION_SIZE_SIM
: CLIENT_KNOBS->LOCATION_CACHE_EVICTION_SIZE;
getValueSubmitted.init(LiteralStringRef("NativeAPI.GetValueSubmitted"));
getValueCompleted.init(LiteralStringRef("NativeAPI.GetValueCompleted"));
clientDBInfoMonitor = monitorClientDBInfoChange(this, clientInfo, &proxiesChangeTrigger);
tssMismatchHandler = handleTssMismatches(this);
clientStatusUpdater.actor = clientStatusUpdateActor(this);
cacheListMonitor = monitorCacheList(this);
smoothMidShardSize.reset(CLIENT_KNOBS->INIT_MID_SHARD_BYTES);
if (apiVersionAtLeast(700)) {
registerSpecialKeySpaceModule(SpecialKeySpace::MODULE::ERRORMSG,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<SingleSpecialKeyImpl>(
SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::ERRORMSG).begin,
[](ReadYourWritesTransaction* ryw) -> Future<Optional<Value>> {
if (ryw->getSpecialKeySpaceErrorMsg().present())
return Optional<Value>(ryw->getSpecialKeySpaceErrorMsg().get());
else
return Optional<Value>();
}));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<ManagementCommandsOptionsImpl>(
KeyRangeRef(LiteralStringRef("options/"), LiteralStringRef("options0"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<ExcludeServersRangeImpl>(SpecialKeySpace::getManamentApiCommandRange("exclude")));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<FailedServersRangeImpl>(SpecialKeySpace::getManamentApiCommandRange("failed")));
registerSpecialKeySpaceModule(SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<ExcludedLocalitiesRangeImpl>(
SpecialKeySpace::getManamentApiCommandRange("excludedlocality")));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<FailedLocalitiesRangeImpl>(SpecialKeySpace::getManamentApiCommandRange("failedlocality")));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<ExclusionInProgressRangeImpl>(
KeyRangeRef(LiteralStringRef("in_progress_exclusion/"), LiteralStringRef("in_progress_exclusion0"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::CONFIGURATION,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<ProcessClassRangeImpl>(
KeyRangeRef(LiteralStringRef("process/class_type/"), LiteralStringRef("process/class_type0"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::CONFIGURATION).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::CONFIGURATION,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<ProcessClassSourceRangeImpl>(
KeyRangeRef(LiteralStringRef("process/class_source/"), LiteralStringRef("process/class_source0"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::CONFIGURATION).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<LockDatabaseImpl>(
singleKeyRange(LiteralStringRef("db_locked"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<ConsistencyCheckImpl>(
singleKeyRange(LiteralStringRef("consistency_check_suspended"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::GLOBALCONFIG,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<GlobalConfigImpl>(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::GLOBALCONFIG)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::TRACING,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<TracingOptionsImpl>(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::TRACING)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::CONFIGURATION,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<CoordinatorsImpl>(
KeyRangeRef(LiteralStringRef("coordinators/"), LiteralStringRef("coordinators0"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::CONFIGURATION).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<CoordinatorsAutoImpl>(
singleKeyRange(LiteralStringRef("auto_coordinators"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<AdvanceVersionImpl>(
singleKeyRange(LiteralStringRef("min_required_commit_version"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<ClientProfilingImpl>(
KeyRangeRef(LiteralStringRef("profiling/"), LiteralStringRef("profiling0"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<MaintenanceImpl>(
KeyRangeRef(LiteralStringRef("maintenance/"), LiteralStringRef("maintenance0"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::MANAGEMENT,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<DataDistributionImpl>(
KeyRangeRef(LiteralStringRef("data_distribution/"), LiteralStringRef("data_distribution0"))
.withPrefix(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::MANAGEMENT).begin)));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::ACTORLINEAGE,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<ActorLineageImpl>(SpecialKeySpace::getModuleRange(SpecialKeySpace::MODULE::ACTORLINEAGE)));
registerSpecialKeySpaceModule(SpecialKeySpace::MODULE::ACTOR_PROFILER_CONF,
SpecialKeySpace::IMPLTYPE::READWRITE,
std::make_unique<ActorProfilerConf>(SpecialKeySpace::getModuleRange(
SpecialKeySpace::MODULE::ACTOR_PROFILER_CONF)));
}
if (apiVersionAtLeast(630)) {
registerSpecialKeySpaceModule(SpecialKeySpace::MODULE::TRANSACTION,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<ConflictingKeysImpl>(conflictingKeysRange));
registerSpecialKeySpaceModule(SpecialKeySpace::MODULE::TRANSACTION,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<ReadConflictRangeImpl>(readConflictRangeKeysRange));
registerSpecialKeySpaceModule(SpecialKeySpace::MODULE::TRANSACTION,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<WriteConflictRangeImpl>(writeConflictRangeKeysRange));
registerSpecialKeySpaceModule(SpecialKeySpace::MODULE::METRICS,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<DDStatsRangeImpl>(ddStatsRange));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::METRICS,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<HealthMetricsRangeImpl>(KeyRangeRef(LiteralStringRef("\xff\xff/metrics/health/"),
LiteralStringRef("\xff\xff/metrics/health0"))));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::WORKERINTERFACE,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<WorkerInterfacesSpecialKeyImpl>(KeyRangeRef(
LiteralStringRef("\xff\xff/worker_interfaces/"), LiteralStringRef("\xff\xff/worker_interfaces0"))));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::STATUSJSON,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<SingleSpecialKeyImpl>(LiteralStringRef("\xff\xff/status/json"),
[](ReadYourWritesTransaction* ryw) -> Future<Optional<Value>> {
if (ryw->getDatabase().getPtr() &&
ryw->getDatabase()->getConnectionRecord()) {
++ryw->getDatabase()->transactionStatusRequests;
return getJSON(ryw->getDatabase());
} else {
return Optional<Value>();
}
}));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::CLUSTERFILEPATH,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<SingleSpecialKeyImpl>(
LiteralStringRef("\xff\xff/cluster_file_path"),
[](ReadYourWritesTransaction* ryw) -> Future<Optional<Value>> {
try {
if (ryw->getDatabase().getPtr() && ryw->getDatabase()->getConnectionRecord()) {
Optional<Value> output =
StringRef(ryw->getDatabase()->getConnectionRecord()->getLocation());
return output;
}
} catch (Error& e) {
return e;
}
return Optional<Value>();
}));
registerSpecialKeySpaceModule(
SpecialKeySpace::MODULE::CONNECTIONSTRING,
SpecialKeySpace::IMPLTYPE::READONLY,
std::make_unique<SingleSpecialKeyImpl>(
LiteralStringRef("\xff\xff/connection_string"),
[](ReadYourWritesTransaction* ryw) -> Future<Optional<Value>> {
try {
if (ryw->getDatabase().getPtr() && ryw->getDatabase()->getConnectionRecord()) {
Reference<IClusterConnectionRecord> f = ryw->getDatabase()->getConnectionRecord();
Optional<Value> output = StringRef(f->getConnectionString().toString());
return output;
}
} catch (Error& e) {
return e;
}
return Optional<Value>();
}));
}
throttleExpirer = recurring([this]() { expireThrottles(); }, CLIENT_KNOBS->TAG_THROTTLE_EXPIRATION_INTERVAL);
if (BUGGIFY) {
DatabaseContext::debugUseTags = true;
}
}
DatabaseContext::DatabaseContext(const Error& err)
: deferredError(err), internal(IsInternal::False), cc("TransactionMetrics"),
transactionReadVersions("ReadVersions", cc), transactionReadVersionsThrottled("ReadVersionsThrottled", cc),
transactionReadVersionsCompleted("ReadVersionsCompleted", cc),
transactionReadVersionBatches("ReadVersionBatches", cc),
transactionBatchReadVersions("BatchPriorityReadVersions", cc),
transactionDefaultReadVersions("DefaultPriorityReadVersions", cc),
transactionImmediateReadVersions("ImmediatePriorityReadVersions", cc),
transactionBatchReadVersionsCompleted("BatchPriorityReadVersionsCompleted", cc),
transactionDefaultReadVersionsCompleted("DefaultPriorityReadVersionsCompleted", cc),
transactionImmediateReadVersionsCompleted("ImmediatePriorityReadVersionsCompleted", cc),
transactionLogicalReads("LogicalUncachedReads", cc), transactionPhysicalReads("PhysicalReadRequests", cc),
transactionPhysicalReadsCompleted("PhysicalReadRequestsCompleted", cc),
transactionGetKeyRequests("GetKeyRequests", cc), transactionGetValueRequests("GetValueRequests", cc),
transactionGetRangeRequests("GetRangeRequests", cc),
transactionGetRangeAndFlatMapRequests("GetRangeAndFlatMapRequests", cc),
transactionGetRangeStreamRequests("GetRangeStreamRequests", cc), transactionWatchRequests("WatchRequests", cc),
transactionGetAddressesForKeyRequests("GetAddressesForKeyRequests", cc), transactionBytesRead("BytesRead", cc),
transactionKeysRead("KeysRead", cc), transactionMetadataVersionReads("MetadataVersionReads", cc),
transactionCommittedMutations("CommittedMutations", cc),
transactionCommittedMutationBytes("CommittedMutationBytes", cc), transactionSetMutations("SetMutations", cc),
transactionClearMutations("ClearMutations", cc), transactionAtomicMutations("AtomicMutations", cc),
transactionsCommitStarted("CommitStarted", cc), transactionsCommitCompleted("CommitCompleted", cc),
transactionKeyServerLocationRequests("KeyServerLocationRequests", cc),
transactionKeyServerLocationRequestsCompleted("KeyServerLocationRequestsCompleted", cc),
transactionStatusRequests("StatusRequests", cc), transactionsTooOld("TooOld", cc),
transactionsFutureVersions("FutureVersions", cc), transactionsNotCommitted("NotCommitted", cc),
transactionsMaybeCommitted("MaybeCommitted", cc), transactionsResourceConstrained("ResourceConstrained", cc),
transactionsProcessBehind("ProcessBehind", cc), transactionsThrottled("Throttled", cc),
transactionsExpensiveClearCostEstCount("ExpensiveClearCostEstCount", cc),
transactionGrvFullBatches("NumGrvFullBatches", cc), transactionGrvTimedOutBatches("NumGrvTimedOutBatches", cc),
latencies(1000), readLatencies(1000), commitLatencies(1000), GRVLatencies(1000), mutationsPerCommit(1000),
bytesPerCommit(1000), transactionTracingSample(false), smoothMidShardSize(CLIENT_KNOBS->SHARD_STAT_SMOOTH_AMOUNT),
connectToDatabaseEventCacheHolder(format("ConnectToDatabase/%s", dbId.toString().c_str())) {}
// Static constructor used by server processes to create a DatabaseContext
// For internal (fdbserver) use only
Database DatabaseContext::create(Reference<AsyncVar<ClientDBInfo>> clientInfo,
Future<Void> clientInfoMonitor,
LocalityData clientLocality,
EnableLocalityLoadBalance enableLocalityLoadBalance,
TaskPriority taskID,
LockAware lockAware,
int apiVersion,
IsSwitchable switchable) {
return Database(new DatabaseContext(Reference<AsyncVar<Reference<IClusterConnectionRecord>>>(),
clientInfo,
makeReference<AsyncVar<Optional<ClientLeaderRegInterface>>>(),
clientInfoMonitor,
taskID,
clientLocality,
enableLocalityLoadBalance,
lockAware,
IsInternal::True,
apiVersion,
switchable));
}
DatabaseContext::~DatabaseContext() {
cacheListMonitor.cancel();
clientDBInfoMonitor.cancel();
monitorTssInfoChange.cancel();
tssMismatchHandler.cancel();
for (auto it = server_interf.begin(); it != server_interf.end(); it = server_interf.erase(it))
it->second->notifyContextDestroyed();
ASSERT_ABORT(server_interf.empty());
locationCache.insert(allKeys, Reference<LocationInfo>());
}
std::pair<KeyRange, Reference<LocationInfo>> DatabaseContext::getCachedLocation(const KeyRef& key, Reverse isBackward) {
if (isBackward) {
auto range = locationCache.rangeContainingKeyBefore(key);
return std::make_pair(range->range(), range->value());
} else {
auto range = locationCache.rangeContaining(key);
return std::make_pair(range->range(), range->value());
}
}
bool DatabaseContext::getCachedLocations(const KeyRangeRef& range,
std::vector<std::pair<KeyRange, Reference<LocationInfo>>>& result,
int limit,
Reverse reverse) {
result.clear();
auto begin = locationCache.rangeContaining(range.begin);
auto end = locationCache.rangeContainingKeyBefore(range.end);
loop {
auto r = reverse ? end : begin;
if (!r->value()) {
TEST(result.size()); // had some but not all cached locations
result.clear();
return false;
}
result.emplace_back(r->range() & range, r->value());
if (result.size() == limit || begin == end) {
break;
}
if (reverse)
--end;
else
++begin;
}
return true;
}
Reference<LocationInfo> DatabaseContext::setCachedLocation(const KeyRangeRef& keys,
const std::vector<StorageServerInterface>& servers) {
std::vector<Reference<ReferencedInterface<StorageServerInterface>>> serverRefs;
serverRefs.reserve(servers.size());
for (const auto& interf : servers) {
serverRefs.push_back(StorageServerInfo::getInterface(this, interf, clientLocality));
}
int maxEvictionAttempts = 100, attempts = 0;
auto loc = makeReference<LocationInfo>(serverRefs);
while (locationCache.size() > locationCacheSize && attempts < maxEvictionAttempts) {
TEST(true); // NativeAPI storage server locationCache entry evicted
attempts++;
auto r = locationCache.randomRange();
Key begin = r.begin(), end = r.end(); // insert invalidates r, so can't be passed a mere reference into it
locationCache.insert(KeyRangeRef(begin, end), Reference<LocationInfo>());
}
locationCache.insert(keys, loc);
return loc;
}
void DatabaseContext::invalidateCache(const KeyRef& key, Reverse isBackward) {
if (isBackward) {
locationCache.rangeContainingKeyBefore(key)->value() = Reference<LocationInfo>();
} else {
locationCache.rangeContaining(key)->value() = Reference<LocationInfo>();
}
}
void DatabaseContext::invalidateCache(const KeyRangeRef& keys) {
auto rs = locationCache.intersectingRanges(keys);
Key begin = rs.begin().begin(),
end = rs.end().begin(); // insert invalidates rs, so can't be passed a mere reference into it
locationCache.insert(KeyRangeRef(begin, end), Reference<LocationInfo>());
}
Future<Void> DatabaseContext::onProxiesChanged() const {
return this->proxiesChangeTrigger.onTrigger();
}
bool DatabaseContext::sampleReadTags() const {
double sampleRate = GlobalConfig::globalConfig().get(transactionTagSampleRate, CLIENT_KNOBS->READ_TAG_SAMPLE_RATE);
return sampleRate > 0 && deterministicRandom()->random01() <= sampleRate;
}
bool DatabaseContext::sampleOnCost(uint64_t cost) const {
double sampleCost =
GlobalConfig::globalConfig().get<double>(transactionTagSampleCost, CLIENT_KNOBS->COMMIT_SAMPLE_COST);
if (sampleCost <= 0)
return false;
return deterministicRandom()->random01() <= (double)cost / sampleCost;
}
int64_t extractIntOption(Optional<StringRef> value, int64_t minValue, int64_t maxValue) {
validateOptionValuePresent(value);
if (value.get().size() != 8) {
throw invalid_option_value();
}
int64_t passed = *((int64_t*)(value.get().begin()));
if (passed > maxValue || passed < minValue) {
throw invalid_option_value();
}
return passed;
}
uint64_t extractHexOption(StringRef value) {
char* end;
uint64_t id = strtoull(value.toString().c_str(), &end, 16);
if (*end)
throw invalid_option_value();
return id;
}
void DatabaseContext::setOption(FDBDatabaseOptions::Option option, Optional<StringRef> value) {
int defaultFor = FDBDatabaseOptions::optionInfo.getMustExist(option).defaultFor;
if (defaultFor >= 0) {
ASSERT(FDBTransactionOptions::optionInfo.find((FDBTransactionOptions::Option)defaultFor) !=
FDBTransactionOptions::optionInfo.end());
transactionDefaults.addOption((FDBTransactionOptions::Option)defaultFor, value.castTo<Standalone<StringRef>>());
} else {
switch (option) {
case FDBDatabaseOptions::LOCATION_CACHE_SIZE:
locationCacheSize = (int)extractIntOption(value, 0, std::numeric_limits<int>::max());
break;
case FDBDatabaseOptions::MACHINE_ID:
clientLocality =
LocalityData(clientLocality.processId(),
value.present() ? Standalone<StringRef>(value.get()) : Optional<Standalone<StringRef>>(),
clientLocality.machineId(),
clientLocality.dcId());
if (clientInfo->get().commitProxies.size())
commitProxies = makeReference<CommitProxyInfo>(clientInfo->get().commitProxies, false);
if (clientInfo->get().grvProxies.size())
grvProxies = makeReference<GrvProxyInfo>(clientInfo->get().grvProxies, true);
server_interf.clear();
locationCache.insert(allKeys, Reference<LocationInfo>());
break;
case FDBDatabaseOptions::MAX_WATCHES:
maxOutstandingWatches = (int)extractIntOption(value, 0, CLIENT_KNOBS->ABSOLUTE_MAX_WATCHES);
break;
case FDBDatabaseOptions::DATACENTER_ID:
clientLocality =
LocalityData(clientLocality.processId(),
clientLocality.zoneId(),
clientLocality.machineId(),
value.present() ? Standalone<StringRef>(value.get()) : Optional<Standalone<StringRef>>());
if (clientInfo->get().commitProxies.size())
commitProxies = makeReference<CommitProxyInfo>(clientInfo->get().commitProxies, false);
if (clientInfo->get().grvProxies.size())
grvProxies = makeReference<GrvProxyInfo>(clientInfo->get().grvProxies, true);
server_interf.clear();
locationCache.insert(allKeys, Reference<LocationInfo>());
break;
case FDBDatabaseOptions::SNAPSHOT_RYW_ENABLE:
validateOptionValueNotPresent(value);
snapshotRywEnabled++;
break;
case FDBDatabaseOptions::SNAPSHOT_RYW_DISABLE:
validateOptionValueNotPresent(value);
snapshotRywEnabled--;
break;
case FDBDatabaseOptions::USE_CONFIG_DATABASE:
validateOptionValueNotPresent(value);
useConfigDatabase = true;
break;
case FDBDatabaseOptions::TEST_CAUSAL_READ_RISKY:
verifyCausalReadsProp = double(extractIntOption(value, 0, 100)) / 100.0;
break;
default:
break;
}
}
}
void DatabaseContext::addWatch() {
if (outstandingWatches >= maxOutstandingWatches)
throw too_many_watches();
++outstandingWatches;
}
void DatabaseContext::removeWatch() {
--outstandingWatches;
ASSERT(outstandingWatches >= 0);
}
Future<Void> DatabaseContext::onConnected() {
return connected;
}
ACTOR static Future<Void> switchConnectionRecordImpl(Reference<IClusterConnectionRecord> connRecord,
DatabaseContext* self) {
TEST(true); // Switch connection file
TraceEvent("SwitchConnectionRecord")
.detail("ClusterFile", connRecord->toString())
.detail("ConnectionString", connRecord->getConnectionString().toString());
// Reset state from former cluster.
self->commitProxies.clear();
self->grvProxies.clear();
self->minAcceptableReadVersion = std::numeric_limits<Version>::max();
self->invalidateCache(allKeys);
auto clearedClientInfo = self->clientInfo->get();
clearedClientInfo.commitProxies.clear();
clearedClientInfo.grvProxies.clear();
clearedClientInfo.id = deterministicRandom()->randomUniqueID();
self->clientInfo->set(clearedClientInfo);
self->connectionRecord->set(connRecord);
state Database db(Reference<DatabaseContext>::addRef(self));
state Transaction tr(db);
loop {
tr.setOption(FDBTransactionOptions::READ_LOCK_AWARE);
try {
TraceEvent("SwitchConnectionRecordAttemptingGRV").log();
Version v = wait(tr.getReadVersion());
TraceEvent("SwitchConnectionRecordGotRV")
.detail("ReadVersion", v)
.detail("MinAcceptableReadVersion", self->minAcceptableReadVersion);
ASSERT(self->minAcceptableReadVersion != std::numeric_limits<Version>::max());
self->connectionFileChangedTrigger.trigger();
return Void();
} catch (Error& e) {
TraceEvent("SwitchConnectionRecordError").detail("Error", e.what());
wait(tr.onError(e));
}
}
}
Reference<IClusterConnectionRecord> DatabaseContext::getConnectionRecord() {
if (connectionRecord) {
return connectionRecord->get();
}
return Reference<IClusterConnectionRecord>();
}
Future<Void> DatabaseContext::switchConnectionRecord(Reference<IClusterConnectionRecord> standby) {
ASSERT(switchable);
return switchConnectionRecordImpl(standby, this);
}
Future<Void> DatabaseContext::connectionFileChanged() {
return connectionFileChangedTrigger.onTrigger();
}
void DatabaseContext::expireThrottles() {
for (auto& priorityItr : throttledTags) {
for (auto tagItr = priorityItr.second.begin(); tagItr != priorityItr.second.end();) {
if (tagItr->second.expired()) {
TEST(true); // Expiring client throttle
tagItr = priorityItr.second.erase(tagItr);
} else {
++tagItr;
}
}
}
}
extern IPAddress determinePublicIPAutomatically(ClusterConnectionString& ccs);
// Creates a database object that represents a connection to a cluster
// This constructor uses a preallocated DatabaseContext that may have been created
// on another thread
Database Database::createDatabase(Reference<IClusterConnectionRecord> connRecord,
int apiVersion,
IsInternal internal,
LocalityData const& clientLocality,
DatabaseContext* preallocatedDb) {
if (!g_network)
throw network_not_setup();
ASSERT(TraceEvent::isNetworkThread());
platform::ImageInfo imageInfo = platform::getImageInfo();
if (connRecord) {
if (networkOptions.traceDirectory.present() && !traceFileIsOpen()) {
g_network->initMetrics();
FlowTransport::transport().initMetrics();
initTraceEventMetrics();
auto publicIP = determinePublicIPAutomatically(connRecord->getConnectionString());
selectTraceFormatter(networkOptions.traceFormat);
selectTraceClockSource(networkOptions.traceClockSource);
addUniversalTraceField("ClientDescription",
format("%s-%s-%" PRIu64,
networkOptions.primaryClient ? "primary" : "external",
FDB_VT_VERSION,
getTraceThreadId()));
openTraceFile(NetworkAddress(publicIP, ::getpid()),
networkOptions.traceRollSize,
networkOptions.traceMaxLogsSize,
networkOptions.traceDirectory.get(),
"trace",
networkOptions.traceLogGroup,
networkOptions.traceFileIdentifier,
networkOptions.tracePartialFileSuffix);
TraceEvent("ClientStart")
.detail("SourceVersion", getSourceVersion())
.detail("Version", FDB_VT_VERSION)
.detail("PackageName", FDB_VT_PACKAGE_NAME)
.detailf("ActualTime", "%lld", DEBUG_DETERMINISM ? 0 : time(nullptr))
.detail("ApiVersion", apiVersion)
.detail("ClientLibrary", imageInfo.fileName)
.detailf("ImageOffset", "%p", imageInfo.offset)
.detail("Primary", networkOptions.primaryClient)
.trackLatest("ClientStart");
initializeSystemMonitorMachineState(SystemMonitorMachineState(IPAddress(publicIP)));
systemMonitor();
uncancellable(recurring(&systemMonitor, CLIENT_KNOBS->SYSTEM_MONITOR_INTERVAL, TaskPriority::FlushTrace));
}
}
g_network->initTLS();
auto clientInfo = makeReference<AsyncVar<ClientDBInfo>>();
auto coordinator = makeReference<AsyncVar<Optional<ClientLeaderRegInterface>>>();
auto connectionRecord = makeReference<AsyncVar<Reference<IClusterConnectionRecord>>>();
connectionRecord->set(connRecord);
Future<Void> clientInfoMonitor = monitorProxies(connectionRecord,
clientInfo,
coordinator,
networkOptions.supportedVersions,
StringRef(networkOptions.traceLogGroup));
DatabaseContext* db;
if (preallocatedDb) {
db = new (preallocatedDb) DatabaseContext(connectionRecord,
clientInfo,
coordinator,
clientInfoMonitor,
TaskPriority::DefaultEndpoint,
clientLocality,
EnableLocalityLoadBalance::True,
LockAware::False,
internal,
apiVersion,
IsSwitchable::True);
} else {
db = new DatabaseContext(connectionRecord,
clientInfo,
coordinator,
clientInfoMonitor,
TaskPriority::DefaultEndpoint,
clientLocality,
EnableLocalityLoadBalance::True,
LockAware::False,
internal,
apiVersion,
IsSwitchable::True);
}
auto database = Database(db);
GlobalConfig::create(
database, Reference<AsyncVar<ClientDBInfo> const>(clientInfo), std::addressof(clientInfo->get()));
GlobalConfig::globalConfig().trigger(samplingFrequency, samplingProfilerUpdateFrequency);
GlobalConfig::globalConfig().trigger(samplingWindow, samplingProfilerUpdateWindow);
TraceEvent("ConnectToDatabase", database->dbId)
.detail("Version", FDB_VT_VERSION)
.detail("ClusterFile", connRecord ? connRecord->toString() : "None")
.detail("ConnectionString", connRecord ? connRecord->getConnectionString().toString() : "None")
.detail("ClientLibrary", imageInfo.fileName)
.detail("Primary", networkOptions.primaryClient)
.detail("Internal", internal)
.trackLatest(database->connectToDatabaseEventCacheHolder.trackingKey);
return database;
}
Database Database::createDatabase(std::string connFileName,
int apiVersion,
IsInternal internal,
LocalityData const& clientLocality) {
Reference<IClusterConnectionRecord> rccr = Reference<IClusterConnectionRecord>(
new ClusterConnectionFile(ClusterConnectionFile::lookupClusterFileName(connFileName).first));
return Database::createDatabase(rccr, apiVersion, internal, clientLocality);
}
Reference<WatchMetadata> DatabaseContext::getWatchMetadata(KeyRef key) const {
const auto it = watchMap.find(key);
if (it == watchMap.end())
return Reference<WatchMetadata>();
return it->second;
}
Key DatabaseContext::setWatchMetadata(Reference<WatchMetadata> metadata) {
watchMap[metadata->parameters->key] = metadata;
return metadata->parameters->key;
}
void DatabaseContext::deleteWatchMetadata(KeyRef key) {
watchMap.erase(key);
}
void DatabaseContext::clearWatchMetadata() {
watchMap.clear();
}
const UniqueOrderedOptionList<FDBTransactionOptions>& Database::getTransactionDefaults() const {
ASSERT(db);
return db->transactionDefaults;
}
void setNetworkOption(FDBNetworkOptions::Option option, Optional<StringRef> value) {
std::regex identifierRegex("^[a-zA-Z0-9_]*$");
switch (option) {
// SOMEDAY: If the network is already started, should these five throw an error?
case FDBNetworkOptions::TRACE_ENABLE:
networkOptions.traceDirectory = value.present() ? value.get().toString() : "";
break;
case FDBNetworkOptions::TRACE_ROLL_SIZE:
validateOptionValuePresent(value);
networkOptions.traceRollSize = extractIntOption(value, 0, std::numeric_limits<int64_t>::max());
break;
case FDBNetworkOptions::TRACE_MAX_LOGS_SIZE:
validateOptionValuePresent(value);
networkOptions.traceMaxLogsSize = extractIntOption(value, 0, std::numeric_limits<int64_t>::max());
break;
case FDBNetworkOptions::TRACE_FORMAT:
validateOptionValuePresent(value);
networkOptions.traceFormat = value.get().toString();
if (!validateTraceFormat(networkOptions.traceFormat)) {
fprintf(stderr, "Unrecognized trace format: `%s'\n", networkOptions.traceFormat.c_str());
throw invalid_option_value();
}
break;
case FDBNetworkOptions::TRACE_FILE_IDENTIFIER:
validateOptionValuePresent(value);
networkOptions.traceFileIdentifier = value.get().toString();
if (networkOptions.traceFileIdentifier.length() > CLIENT_KNOBS->TRACE_LOG_FILE_IDENTIFIER_MAX_LENGTH) {
fprintf(stderr, "Trace file identifier provided is too long.\n");
throw invalid_option_value();
} else if (!std::regex_match(networkOptions.traceFileIdentifier, identifierRegex)) {
fprintf(stderr, "Trace file identifier should only contain alphanumerics and underscores.\n");
throw invalid_option_value();
}
break;
case FDBNetworkOptions::TRACE_LOG_GROUP:
if (value.present()) {
if (traceFileIsOpen()) {
setTraceLogGroup(value.get().toString());
} else {
networkOptions.traceLogGroup = value.get().toString();
}
}
break;
case FDBNetworkOptions::TRACE_CLOCK_SOURCE:
validateOptionValuePresent(value);
networkOptions.traceClockSource = value.get().toString();
if (!validateTraceClockSource(networkOptions.traceClockSource)) {
fprintf(stderr, "Unrecognized trace clock source: `%s'\n", networkOptions.traceClockSource.c_str());
throw invalid_option_value();
}
break;
case FDBNetworkOptions::TRACE_PARTIAL_FILE_SUFFIX:
validateOptionValuePresent(value);
networkOptions.tracePartialFileSuffix = value.get().toString();
break;
case FDBNetworkOptions::KNOB: {
validateOptionValuePresent(value);
std::string optionValue = value.get().toString();
TraceEvent("SetKnob").detail("KnobString", optionValue);
size_t eq = optionValue.find_first_of('=');
if (eq == optionValue.npos) {
TraceEvent(SevWarnAlways, "InvalidKnobString").detail("KnobString", optionValue);
throw invalid_option_value();
}
std::string knobName = optionValue.substr(0, eq);
std::string knobValueString = optionValue.substr(eq + 1);
try {
auto knobValue = IKnobCollection::parseKnobValue(knobName, knobValueString, IKnobCollection::Type::CLIENT);
if (g_network) {
IKnobCollection::getMutableGlobalKnobCollection().setKnob(knobName, knobValue);
} else {
networkOptions.knobs[knobName] = knobValue;
}
} catch (Error& e) {
TraceEvent(SevWarnAlways, "UnrecognizedKnob").detail("Knob", knobName.c_str());
fprintf(stderr, "FoundationDB client ignoring unrecognized knob option '%s'\n", knobName.c_str());
}
break;
}
case FDBNetworkOptions::TLS_PLUGIN:
validateOptionValuePresent(value);
break;
case FDBNetworkOptions::TLS_CERT_PATH:
validateOptionValuePresent(value);
tlsConfig.setCertificatePath(value.get().toString());
break;
case FDBNetworkOptions::TLS_CERT_BYTES: {
validateOptionValuePresent(value);
tlsConfig.setCertificateBytes(value.get().toString());
break;
}
case FDBNetworkOptions::TLS_CA_PATH: {
validateOptionValuePresent(value);
tlsConfig.setCAPath(value.get().toString());
break;
}
case FDBNetworkOptions::TLS_CA_BYTES: {
validateOptionValuePresent(value);
tlsConfig.setCABytes(value.get().toString());
break;
}
case FDBNetworkOptions::TLS_PASSWORD:
validateOptionValuePresent(value);
tlsConfig.setPassword(value.get().toString());
break;
case FDBNetworkOptions::TLS_KEY_PATH:
validateOptionValuePresent(value);
tlsConfig.setKeyPath(value.get().toString());
break;
case FDBNetworkOptions::TLS_KEY_BYTES: {
validateOptionValuePresent(value);
tlsConfig.setKeyBytes(value.get().toString());
break;
}
case FDBNetworkOptions::TLS_VERIFY_PEERS:
validateOptionValuePresent(value);
tlsConfig.clearVerifyPeers();
tlsConfig.addVerifyPeers(value.get().toString());
break;
case FDBNetworkOptions::CLIENT_BUGGIFY_ENABLE:
enableBuggify(true, BuggifyType::Client);
break;
case FDBNetworkOptions::CLIENT_BUGGIFY_DISABLE:
enableBuggify(false, BuggifyType::Client);
break;
case FDBNetworkOptions::CLIENT_BUGGIFY_SECTION_ACTIVATED_PROBABILITY:
validateOptionValuePresent(value);
clearBuggifySections(BuggifyType::Client);
P_BUGGIFIED_SECTION_ACTIVATED[int(BuggifyType::Client)] = double(extractIntOption(value, 0, 100)) / 100.0;
break;
case FDBNetworkOptions::CLIENT_BUGGIFY_SECTION_FIRED_PROBABILITY:
validateOptionValuePresent(value);
P_BUGGIFIED_SECTION_FIRES[int(BuggifyType::Client)] = double(extractIntOption(value, 0, 100)) / 100.0;
break;
case FDBNetworkOptions::DISABLE_CLIENT_STATISTICS_LOGGING:
validateOptionValueNotPresent(value);
networkOptions.logClientInfo = false;
break;
case FDBNetworkOptions::SUPPORTED_CLIENT_VERSIONS: {
// The multi-version API should be providing us these guarantees
ASSERT(g_network);
ASSERT(value.present());
Standalone<VectorRef<ClientVersionRef>> supportedVersions;
std::vector<StringRef> supportedVersionsStrings = value.get().splitAny(LiteralStringRef(";"));
for (StringRef versionString : supportedVersionsStrings) {
#ifdef ADDRESS_SANITIZER
__lsan_disable();
#endif
// LSAN reports that we leak this allocation in client
// tests, but I cannot seem to figure out why. AFAICT
// it's not actually leaking. If it is a leak, it's only a few bytes.
supportedVersions.push_back_deep(supportedVersions.arena(), ClientVersionRef(versionString));
#ifdef ADDRESS_SANITIZER
__lsan_enable();
#endif
}
ASSERT(supportedVersions.size() > 0);
networkOptions.supportedVersions->set(supportedVersions);
break;
}
case FDBNetworkOptions::ENABLE_RUN_LOOP_PROFILING: // Same as ENABLE_SLOW_TASK_PROFILING
validateOptionValueNotPresent(value);
networkOptions.runLoopProfilingEnabled = true;
break;
case FDBNetworkOptions::DISTRIBUTED_CLIENT_TRACER: {
validateOptionValuePresent(value);
std::string tracer = value.get().toString();
if (tracer == "none" || tracer == "disabled") {
openTracer(TracerType::DISABLED);
} else if (tracer == "logfile" || tracer == "file" || tracer == "log_file") {
openTracer(TracerType::LOG_FILE);
} else if (tracer == "network_lossy") {
openTracer(TracerType::NETWORK_LOSSY);
} else {
fprintf(stderr, "ERROR: Unknown or unsupported tracer: `%s'", tracer.c_str());
throw invalid_option_value();
}
break;
}
case FDBNetworkOptions::EXTERNAL_CLIENT:
networkOptions.primaryClient = false;
break;
default:
break;
}
}
// update the network busyness on a 1s cadence
ACTOR Future<Void> monitorNetworkBusyness() {
state double prevTime = now();
loop {
wait(delay(CLIENT_KNOBS->NETWORK_BUSYNESS_MONITOR_INTERVAL, TaskPriority::FlushTrace));
double elapsed = now() - prevTime; // get elapsed time from last execution
prevTime = now();
struct NetworkMetrics::PriorityStats& tracker = g_network->networkInfo.metrics.starvationTrackerNetworkBusyness;
if (tracker.active) { // update metrics
tracker.duration += now() - tracker.windowedTimer;
tracker.maxDuration = std::max(tracker.maxDuration, now() - tracker.timer);
tracker.windowedTimer = now();
}
double busyFraction = std::min(elapsed, tracker.duration) / elapsed;
// The burstiness score is an indicator of the maximum busyness spike over the measurement interval.
// It scales linearly from 0 to 1 as the largest burst goes from the start to the saturation threshold.
// This allows us to account for saturation that happens in smaller bursts than the measurement interval.
//
// Burstiness will not be calculated if the saturation threshold is smaller than the start threshold or
// if either value is negative.
double burstiness = 0;
if (CLIENT_KNOBS->BUSYNESS_SPIKE_START_THRESHOLD >= 0 &&
CLIENT_KNOBS->BUSYNESS_SPIKE_SATURATED_THRESHOLD >= CLIENT_KNOBS->BUSYNESS_SPIKE_START_THRESHOLD) {
burstiness = std::min(1.0,
std::max(0.0, tracker.maxDuration - CLIENT_KNOBS->BUSYNESS_SPIKE_START_THRESHOLD) /
std::max(1e-6,
CLIENT_KNOBS->BUSYNESS_SPIKE_SATURATED_THRESHOLD -
CLIENT_KNOBS->BUSYNESS_SPIKE_START_THRESHOLD));
}
g_network->networkInfo.metrics.networkBusyness = std::max(busyFraction, burstiness);
tracker.duration = 0;
tracker.maxDuration = 0;
}
}
static void setupGlobalKnobs() {
IKnobCollection::setGlobalKnobCollection(IKnobCollection::Type::CLIENT, Randomize::False, IsSimulated::False);
for (const auto& [knobName, knobValue] : networkOptions.knobs) {
IKnobCollection::getMutableGlobalKnobCollection().setKnob(knobName, knobValue);
}
}
// Setup g_network and start monitoring for network busyness
void setupNetwork(uint64_t transportId, UseMetrics useMetrics) {
if (g_network)
throw network_already_setup();
if (!networkOptions.logClientInfo.present())
networkOptions.logClientInfo = true;
setupGlobalKnobs();
g_network = newNet2(tlsConfig, false, useMetrics || networkOptions.traceDirectory.present());
g_network->addStopCallback(Net2FileSystem::stop);
FlowTransport::createInstance(true, transportId, WLTOKEN_RESERVED_COUNT);
Net2FileSystem::newFileSystem();
uncancellable(monitorNetworkBusyness());
}
void runNetwork() {
if (!g_network) {
throw network_not_setup();
}
if (!g_network->checkRunnable()) {
throw network_cannot_be_restarted();
}
if (networkOptions.traceDirectory.present() && networkOptions.runLoopProfilingEnabled) {
setupRunLoopProfiler();
}
g_network->run();
if (networkOptions.traceDirectory.present())
systemMonitor();
}
void stopNetwork() {
if (!g_network)
throw network_not_setup();
TraceEvent("ClientStopNetwork");
g_network->stop();
closeTraceFile();
}
void DatabaseContext::updateProxies() {
if (proxiesLastChange == clientInfo->get().id)
return;
proxiesLastChange = clientInfo->get().id;
commitProxies.clear();
grvProxies.clear();
bool commitProxyProvisional = false, grvProxyProvisional = false;
if (clientInfo->get().commitProxies.size()) {
commitProxies = makeReference<CommitProxyInfo>(clientInfo->get().commitProxies, false);
commitProxyProvisional = clientInfo->get().commitProxies[0].provisional;
}
if (clientInfo->get().grvProxies.size()) {
grvProxies = makeReference<GrvProxyInfo>(clientInfo->get().grvProxies, true);
grvProxyProvisional = clientInfo->get().grvProxies[0].provisional;
}
if (clientInfo->get().commitProxies.size() && clientInfo->get().grvProxies.size()) {
ASSERT(commitProxyProvisional == grvProxyProvisional);
proxyProvisional = commitProxyProvisional;
}
}
Reference<CommitProxyInfo> DatabaseContext::getCommitProxies(UseProvisionalProxies useProvisionalProxies) {
updateProxies();
if (proxyProvisional && !useProvisionalProxies) {
return Reference<CommitProxyInfo>();
}
return commitProxies;
}
Reference<GrvProxyInfo> DatabaseContext::getGrvProxies(UseProvisionalProxies useProvisionalProxies) {
updateProxies();
if (proxyProvisional && !useProvisionalProxies) {
return Reference<GrvProxyInfo>();
}
return grvProxies;
}
// Actor which will wait until the MultiInterface<CommitProxyInterface> returned by the DatabaseContext cx is not
// nullptr
ACTOR Future<Reference<CommitProxyInfo>> getCommitProxiesFuture(DatabaseContext* cx,
UseProvisionalProxies useProvisionalProxies) {
loop {
Reference<CommitProxyInfo> commitProxies = cx->getCommitProxies(useProvisionalProxies);
if (commitProxies)
return commitProxies;
wait(cx->onProxiesChanged());
}
}
// Returns a future which will not be set until the CommitProxyInfo of this DatabaseContext is not nullptr
Future<Reference<CommitProxyInfo>> DatabaseContext::getCommitProxiesFuture(
UseProvisionalProxies useProvisionalProxies) {
return ::getCommitProxiesFuture(this, useProvisionalProxies);
}
void GetRangeLimits::decrement(VectorRef<KeyValueRef> const& data) {
if (rows != GetRangeLimits::ROW_LIMIT_UNLIMITED) {
ASSERT(data.size() <= rows);
rows -= data.size();
}
minRows = std::max(0, minRows - data.size());
if (bytes != GetRangeLimits::BYTE_LIMIT_UNLIMITED)
bytes = std::max(0, bytes - (int)data.expectedSize() - (8 - (int)sizeof(KeyValueRef)) * data.size());
}
void GetRangeLimits::decrement(KeyValueRef const& data) {
minRows = std::max(0, minRows - 1);
if (rows != GetRangeLimits::ROW_LIMIT_UNLIMITED)
rows--;
if (bytes != GetRangeLimits::BYTE_LIMIT_UNLIMITED)
bytes = std::max(0, bytes - (int)8 - (int)data.expectedSize());
}
// True if either the row or byte limit has been reached
bool GetRangeLimits::isReached() {
return rows == 0 || (bytes == 0 && minRows == 0);
}
// True if data would cause the row or byte limit to be reached
bool GetRangeLimits::reachedBy(VectorRef<KeyValueRef> const& data) {
return (rows != GetRangeLimits::ROW_LIMIT_UNLIMITED && data.size() >= rows) ||
(bytes != GetRangeLimits::BYTE_LIMIT_UNLIMITED &&
(int)data.expectedSize() + (8 - (int)sizeof(KeyValueRef)) * data.size() >= bytes && data.size() >= minRows);
}
bool GetRangeLimits::hasByteLimit() {
return bytes != GetRangeLimits::BYTE_LIMIT_UNLIMITED;
}
bool GetRangeLimits::hasRowLimit() {
return rows != GetRangeLimits::ROW_LIMIT_UNLIMITED;
}
bool GetRangeLimits::hasSatisfiedMinRows() {
return hasByteLimit() && minRows == 0;
}
AddressExclusion AddressExclusion::parse(StringRef const& key) {
// Must not change: serialized to the database!
auto parsedIp = IPAddress::parse(key.toString());
if (parsedIp.present()) {
return AddressExclusion(parsedIp.get());
}
// Not a whole machine, includes `port'.
try {
auto addr = NetworkAddress::parse(key.toString());
if (addr.isTLS()) {
TraceEvent(SevWarnAlways, "AddressExclusionParseError")
.detail("String", key)
.detail("Description", "Address inclusion string should not include `:tls' suffix.");
return AddressExclusion();
}
return AddressExclusion(addr.ip, addr.port);
} catch (Error&) {
TraceEvent(SevWarnAlways, "AddressExclusionParseError").detail("String", key);
return AddressExclusion();
}
}
Future<Optional<Value>> getValue(Reference<TransactionState> const& trState,
Key const& key,
Future<Version> const& version,
TransactionRecordLogInfo const& recordLogInfo);
Future<RangeResult> getRange(Reference<TransactionState> const& trState,
Future<Version> const& fVersion,
KeySelector const& begin,
KeySelector const& end,
GetRangeLimits const& limits,
Reverse const& reverse);
ACTOR Future<Optional<StorageServerInterface>> fetchServerInterface(Reference<TransactionState> trState,
Future<Version> ver,
UID id) {
Optional<Value> val = wait(getValue(trState, serverListKeyFor(id), ver, TransactionRecordLogInfo::False));
if (!val.present()) {
// A storage server has been removed from serverList since we read keyServers
return Optional<StorageServerInterface>();
}
return decodeServerListValue(val.get());
}
ACTOR Future<Optional<std::vector<StorageServerInterface>>>
transactionalGetServerInterfaces(Reference<TransactionState> trState, Future<Version> ver, std::vector<UID> ids) {
state std::vector<Future<Optional<StorageServerInterface>>> serverListEntries;
serverListEntries.reserve(ids.size());
for (int s = 0; s < ids.size(); s++) {
serverListEntries.push_back(fetchServerInterface(trState, ver, ids[s]));
}
std::vector<Optional<StorageServerInterface>> serverListValues = wait(getAll(serverListEntries));
std::vector<StorageServerInterface> serverInterfaces;
for (int s = 0; s < serverListValues.size(); s++) {
if (!serverListValues[s].present()) {
// A storage server has been removed from ServerList since we read keyServers
return Optional<std::vector<StorageServerInterface>>();
}
serverInterfaces.push_back(serverListValues[s].get());
}
return serverInterfaces;
}
void updateTssMappings(Database cx, const GetKeyServerLocationsReply& reply) {
// Since a ss -> tss mapping is included in resultsTssMapping iff that SS is in results and has a tss pair,
// all SS in results that do not have a mapping present must not have a tss pair.
std::unordered_map<UID, const StorageServerInterface*> ssiById;
for (const auto& [_, shard] : reply.results) {
for (auto& ssi : shard) {
ssiById[ssi.id()] = &ssi;
}
}
for (const auto& mapping : reply.resultsTssMapping) {
auto ssi = ssiById.find(mapping.first);
ASSERT(ssi != ssiById.end());
cx->addTssMapping(*ssi->second, mapping.second);
ssiById.erase(mapping.first);
}
// if SS didn't have a mapping above, it's still in the ssiById map, so remove its tss mapping
for (const auto& it : ssiById) {
cx->removeTssMapping(*it.second);
}
}
// If isBackward == true, returns the shard containing the key before 'key' (an infinitely long, inexpressible key).
// Otherwise returns the shard containing key
ACTOR Future<std::pair<KeyRange, Reference<LocationInfo>>> getKeyLocation_internal(
Database cx,
Key key,
SpanID spanID,
Optional<UID> debugID,
UseProvisionalProxies useProvisionalProxies,
Reverse isBackward) {
state Span span("NAPI:getKeyLocation"_loc, spanID);
if (isBackward) {
ASSERT(key != allKeys.begin && key <= allKeys.end);
} else {
ASSERT(key < allKeys.end);
}
if (debugID.present())
g_traceBatch.addEvent("TransactionDebug", debugID.get().first(), "NativeAPI.getKeyLocation.Before");
loop {
++cx->transactionKeyServerLocationRequests;
choose {
when(wait(cx->onProxiesChanged())) {}
when(GetKeyServerLocationsReply rep = wait(basicLoadBalance(
cx->getCommitProxies(useProvisionalProxies),
&CommitProxyInterface::getKeyServersLocations,
GetKeyServerLocationsRequest(span.context, key, Optional<KeyRef>(), 100, isBackward, key.arena()),
TaskPriority::DefaultPromiseEndpoint))) {
++cx->transactionKeyServerLocationRequestsCompleted;
if (debugID.present())
g_traceBatch.addEvent("TransactionDebug", debugID.get().first(), "NativeAPI.getKeyLocation.After");
ASSERT(rep.results.size() == 1);
auto locationInfo = cx->setCachedLocation(rep.results[0].first, rep.results[0].second);
updateTssMappings(cx, rep);
return std::make_pair(KeyRange(rep.results[0].first, rep.arena), locationInfo);
}
}
}
}
template <class F>
Future<std::pair<KeyRange, Reference<LocationInfo>>> getKeyLocation(Database const& cx,
Key const& key,
F StorageServerInterface::*member,
SpanID spanID,
Optional<UID> debugID,
UseProvisionalProxies useProvisionalProxies,
Reverse isBackward = Reverse::False) {
// we first check whether this range is cached
auto ssi = cx->getCachedLocation(key, isBackward);
if (!ssi.second) {
return getKeyLocation_internal(cx, key, spanID, debugID, useProvisionalProxies, isBackward);
}
for (int i = 0; i < ssi.second->size(); i++) {
if (IFailureMonitor::failureMonitor().onlyEndpointFailed(ssi.second->get(i, member).getEndpoint())) {
cx->invalidateCache(key);
ssi.second.clear();
return getKeyLocation_internal(cx, key, spanID, debugID, useProvisionalProxies, isBackward);
}
}
return ssi;
}
template <class F>
Future<std::pair<KeyRange, Reference<LocationInfo>>> getKeyLocation(Reference<TransactionState> trState,
Key const& key,
F StorageServerInterface::*member,
Reverse isBackward = Reverse::False) {
return getKeyLocation(
trState->cx, key, member, trState->spanID, trState->debugID, trState->useProvisionalProxies, isBackward);
}
ACTOR Future<std::vector<std::pair<KeyRange, Reference<LocationInfo>>>> getKeyRangeLocations_internal(
Database cx,
KeyRange keys,
int limit,
Reverse reverse,
SpanID spanID,
Optional<UID> debugID,
UseProvisionalProxies useProvisionalProxies) {
state Span span("NAPI:getKeyRangeLocations"_loc, spanID);
if (debugID.present())
g_traceBatch.addEvent("TransactionDebug", debugID.get().first(), "NativeAPI.getKeyLocations.Before");
loop {
++cx->transactionKeyServerLocationRequests;
choose {
when(wait(cx->onProxiesChanged())) {}
when(GetKeyServerLocationsReply _rep = wait(basicLoadBalance(
cx->getCommitProxies(useProvisionalProxies),
&CommitProxyInterface::getKeyServersLocations,
GetKeyServerLocationsRequest(span.context, keys.begin, keys.end, limit, reverse, keys.arena()),
TaskPriority::DefaultPromiseEndpoint))) {
++cx->transactionKeyServerLocationRequestsCompleted;
state GetKeyServerLocationsReply rep = _rep;
if (debugID.present())
g_traceBatch.addEvent("TransactionDebug", debugID.get().first(), "NativeAPI.getKeyLocations.After");
ASSERT(rep.results.size());
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> results;
state int shard = 0;
for (; shard < rep.results.size(); shard++) {
// FIXME: these shards are being inserted into the map sequentially, it would be much more CPU
// efficient to save the map pairs and insert them all at once.
results.emplace_back(rep.results[shard].first & keys,
cx->setCachedLocation(rep.results[shard].first, rep.results[shard].second));
wait(yield());
}
updateTssMappings(cx, rep);
return results;
}
}
}
}
// Get the SS locations for each shard in the 'keys' key-range;
// Returned vector size is the number of shards in the input keys key-range.
// Returned vector element is <ShardRange, storage server location info> pairs, where
// ShardRange is the whole shard key-range, not a part of the given key range.
// Example: If query the function with key range (b, d), the returned list of pairs could be something like:
// [([a, b1), locationInfo), ([b1, c), locationInfo), ([c, d1), locationInfo)].
template <class F>
Future<std::vector<std::pair<KeyRange, Reference<LocationInfo>>>> getKeyRangeLocations(
Database const& cx,
KeyRange const& keys,
int limit,
Reverse reverse,
F StorageServerInterface::*member,
SpanID const& spanID,
Optional<UID> const& debugID,
UseProvisionalProxies useProvisionalProxies) {
ASSERT(!keys.empty());
std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations;
if (!cx->getCachedLocations(keys, locations, limit, reverse)) {
return getKeyRangeLocations_internal(cx, keys, limit, reverse, spanID, debugID, useProvisionalProxies);
}
bool foundFailed = false;
for (const auto& [range, locInfo] : locations) {
bool onlyEndpointFailed = false;
for (int i = 0; i < locInfo->size(); i++) {
if (IFailureMonitor::failureMonitor().onlyEndpointFailed(locInfo->get(i, member).getEndpoint())) {
onlyEndpointFailed = true;
break;
}
}
if (onlyEndpointFailed) {
cx->invalidateCache(range.begin);
foundFailed = true;
}
}
if (foundFailed) {
return getKeyRangeLocations_internal(cx, keys, limit, reverse, spanID, debugID, useProvisionalProxies);
}
return locations;
}
template <class F>
Future<std::vector<std::pair<KeyRange, Reference<LocationInfo>>>> getKeyRangeLocations(
Reference<TransactionState> trState,
KeyRange const& keys,
int limit,
Reverse reverse,
F StorageServerInterface::*member) {
return getKeyRangeLocations(
trState->cx, keys, limit, reverse, member, trState->spanID, trState->debugID, trState->useProvisionalProxies);
}
ACTOR Future<Void> warmRange_impl(Reference<TransactionState> trState, KeyRange keys) {
state int totalRanges = 0;
state int totalRequests = 0;
loop {
std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations_internal(trState->cx,
keys,
CLIENT_KNOBS->WARM_RANGE_SHARD_LIMIT,
Reverse::False,
trState->spanID,
trState->debugID,
trState->useProvisionalProxies));
totalRanges += CLIENT_KNOBS->WARM_RANGE_SHARD_LIMIT;
totalRequests++;
if (locations.size() == 0 || totalRanges >= trState->cx->locationCacheSize ||
locations[locations.size() - 1].first.end >= keys.end)
break;
keys = KeyRangeRef(locations[locations.size() - 1].first.end, keys.end);
if (totalRequests % 20 == 0) {
// To avoid blocking the proxies from starting other transactions, occasionally get a read version.
state Transaction tr(trState->cx);
loop {
try {
tr.setOption(FDBTransactionOptions::LOCK_AWARE);
tr.setOption(FDBTransactionOptions::CAUSAL_READ_RISKY);
wait(success(tr.getReadVersion()));
break;
} catch (Error& e) {
wait(tr.onError(e));
}
}
}
}
return Void();
}
SpanID generateSpanID(bool transactionTracingSample, SpanID parentContext = SpanID()) {
uint64_t txnId = deterministicRandom()->randomUInt64();
if (parentContext.isValid()) {
if (parentContext.first() > 0) {
txnId = parentContext.first();
}
uint64_t tokenId = parentContext.second() > 0 ? deterministicRandom()->randomUInt64() : 0;
return SpanID(txnId, tokenId);
} else if (transactionTracingSample) {
uint64_t tokenId = deterministicRandom()->random01() <= FLOW_KNOBS->TRACING_SAMPLE_RATE
? deterministicRandom()->randomUInt64()
: 0;
return SpanID(txnId, tokenId);
} else {
return SpanID(txnId, 0);
}
}
Reference<TransactionState> TransactionState::cloneAndReset(Reference<TransactionLogInfo> newTrLogInfo,
bool generateNewSpan) const {
SpanID newSpanID = generateNewSpan ? generateSpanID(cx->transactionTracingSample) : spanID;
Reference<TransactionState> newState = makeReference<TransactionState>(cx, cx->taskID, newSpanID, newTrLogInfo);
if (!cx->apiVersionAtLeast(16)) {
newState->options = options;
}
newState->numErrors = numErrors;
newState->startTime = startTime;
newState->committedVersion = committedVersion;
newState->conflictingKeys = conflictingKeys;
return newState;
}
Future<Void> Transaction::warmRange(KeyRange keys) {
return warmRange_impl(trState, keys);
}
ACTOR Future<Optional<Value>> getValue(Reference<TransactionState> trState,
Key key,
Future<Version> version,
TransactionRecordLogInfo recordLogInfo = TransactionRecordLogInfo::True) {
state Version ver = wait(version);
state Span span("NAPI:getValue"_loc, trState->spanID);
span.addTag("key"_sr, key);
trState->cx->validateVersion(ver);
loop {
state std::pair<KeyRange, Reference<LocationInfo>> ssi =
wait(getKeyLocation(trState, key, &StorageServerInterface::getValue));
state Optional<UID> getValueID = Optional<UID>();
state uint64_t startTime;
state double startTimeD;
try {
if (trState->debugID.present()) {
getValueID = nondeterministicRandom()->randomUniqueID();
g_traceBatch.addAttach("GetValueAttachID", trState->debugID.get().first(), getValueID.get().first());
g_traceBatch.addEvent("GetValueDebug",
getValueID.get().first(),
"NativeAPI.getValue.Before"); //.detail("TaskID", g_network->getCurrentTask());
/*TraceEvent("TransactionDebugGetValueInfo", getValueID.get())
.detail("Key", key)
.detail("ReqVersion", ver)
.detail("Servers", describe(ssi.second->get()));*/
}
++trState->cx->getValueSubmitted;
startTime = timer_int();
startTimeD = now();
++trState->cx->transactionPhysicalReads;
state GetValueReply reply;
try {
if (CLIENT_BUGGIFY_WITH_PROB(.01)) {
throw deterministicRandom()->randomChoice(
std::vector<Error>{ transaction_too_old(), future_version() });
}
choose {
when(wait(trState->cx->connectionFileChanged())) { throw transaction_too_old(); }
when(GetValueReply _reply = wait(loadBalance(
trState->cx.getPtr(),
ssi.second,
&StorageServerInterface::getValue,
GetValueRequest(span.context,
key,
ver,
trState->cx->sampleReadTags() ? trState->options.readTags
: Optional<TagSet>(),
getValueID),
TaskPriority::DefaultPromiseEndpoint,
AtMostOnce::False,
trState->cx->enableLocalityLoadBalance ? &trState->cx->queueModel : nullptr))) {
reply = _reply;
}
}
++trState->cx->transactionPhysicalReadsCompleted;
} catch (Error&) {
++trState->cx->transactionPhysicalReadsCompleted;
throw;
}
double latency = now() - startTimeD;
trState->cx->readLatencies.addSample(latency);
if (trState->trLogInfo && recordLogInfo) {
int valueSize = reply.value.present() ? reply.value.get().size() : 0;
trState->trLogInfo->addLog(FdbClientLogEvents::EventGet(
startTimeD, trState->cx->clientLocality.dcId(), latency, valueSize, key));
}
trState->cx->getValueCompleted->latency = timer_int() - startTime;
trState->cx->getValueCompleted->log();
if (getValueID.present()) {
g_traceBatch.addEvent("GetValueDebug",
getValueID.get().first(),
"NativeAPI.getValue.After"); //.detail("TaskID", g_network->getCurrentTask());
/*TraceEvent("TransactionDebugGetValueDone", getValueID.get())
.detail("Key", key)
.detail("ReqVersion", ver)
.detail("ReplySize", reply.value.present() ? reply.value.get().size() : -1);*/
}
trState->cx->transactionBytesRead += reply.value.present() ? reply.value.get().size() : 0;
++trState->cx->transactionKeysRead;
return reply.value;
} catch (Error& e) {
trState->cx->getValueCompleted->latency = timer_int() - startTime;
trState->cx->getValueCompleted->log();
if (getValueID.present()) {
g_traceBatch.addEvent("GetValueDebug",
getValueID.get().first(),
"NativeAPI.getValue.Error"); //.detail("TaskID", g_network->getCurrentTask());
/*TraceEvent("TransactionDebugGetValueDone", getValueID.get())
.detail("Key", key)
.detail("ReqVersion", ver)
.detail("ReplySize", reply.value.present() ? reply.value.get().size() : -1);*/
}
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_all_alternatives_failed ||
(e.code() == error_code_transaction_too_old && ver == latestVersion)) {
trState->cx->invalidateCache(key);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, trState->taskID));
} else {
if (trState->trLogInfo && recordLogInfo)
trState->trLogInfo->addLog(FdbClientLogEvents::EventGetError(
startTimeD, trState->cx->clientLocality.dcId(), static_cast<int>(e.code()), key));
throw e;
}
}
}
}
ACTOR Future<Key> getKey(Reference<TransactionState> trState, KeySelector k, Future<Version> version) {
wait(success(version));
state Optional<UID> getKeyID = Optional<UID>();
state Span span("NAPI:getKey"_loc, trState->spanID);
if (trState->debugID.present()) {
getKeyID = nondeterministicRandom()->randomUniqueID();
g_traceBatch.addAttach("GetKeyAttachID", trState->debugID.get().first(), getKeyID.get().first());
g_traceBatch.addEvent(
"GetKeyDebug",
getKeyID.get().first(),
"NativeAPI.getKey.AfterVersion"); //.detail("StartKey",
// k.getKey()).detail("Offset",k.offset).detail("OrEqual",k.orEqual);
}
loop {
if (k.getKey() == allKeys.end) {
if (k.offset > 0)
return allKeys.end;
k.orEqual = false;
} else if (k.getKey() == allKeys.begin && k.offset <= 0) {
return Key();
}
Key locationKey(k.getKey(), k.arena());
state std::pair<KeyRange, Reference<LocationInfo>> ssi =
wait(getKeyLocation(trState, locationKey, &StorageServerInterface::getKey, Reverse{ k.isBackward() }));
try {
if (getKeyID.present())
g_traceBatch.addEvent(
"GetKeyDebug",
getKeyID.get().first(),
"NativeAPI.getKey.Before"); //.detail("StartKey",
// k.getKey()).detail("Offset",k.offset).detail("OrEqual",k.orEqual);
++trState->cx->transactionPhysicalReads;
GetKeyRequest req(span.context,
k,
version.get(),
trState->cx->sampleReadTags() ? trState->options.readTags : Optional<TagSet>(),
getKeyID);
req.arena.dependsOn(k.arena());
state GetKeyReply reply;
try {
choose {
when(wait(trState->cx->connectionFileChanged())) { throw transaction_too_old(); }
when(GetKeyReply _reply = wait(loadBalance(
trState->cx.getPtr(),
ssi.second,
&StorageServerInterface::getKey,
req,
TaskPriority::DefaultPromiseEndpoint,
AtMostOnce::False,
trState->cx->enableLocalityLoadBalance ? &trState->cx->queueModel : nullptr))) {
reply = _reply;
}
}
++trState->cx->transactionPhysicalReadsCompleted;
} catch (Error&) {
++trState->cx->transactionPhysicalReadsCompleted;
throw;
}
if (getKeyID.present())
g_traceBatch.addEvent("GetKeyDebug",
getKeyID.get().first(),
"NativeAPI.getKey.After"); //.detail("NextKey",reply.sel.key).detail("Offset",
// reply.sel.offset).detail("OrEqual", k.orEqual);
k = reply.sel;
if (!k.offset && k.orEqual) {
return k.getKey();
}
} catch (Error& e) {
if (getKeyID.present())
g_traceBatch.addEvent("GetKeyDebug", getKeyID.get().first(), "NativeAPI.getKey.Error");
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_all_alternatives_failed) {
trState->cx->invalidateCache(k.getKey(), Reverse{ k.isBackward() });
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, trState->taskID));
} else {
TraceEvent(SevInfo, "GetKeyError").error(e).detail("AtKey", k.getKey()).detail("Offset", k.offset);
throw e;
}
}
}
}
ACTOR Future<Version> waitForCommittedVersion(Database cx, Version version, SpanID spanContext) {
state Span span("NAPI:waitForCommittedVersion"_loc, { spanContext });
try {
loop {
choose {
when(wait(cx->onProxiesChanged())) {}
when(GetReadVersionReply v =
wait(basicLoadBalance(cx->getGrvProxies(UseProvisionalProxies::False),
&GrvProxyInterface::getConsistentReadVersion,
GetReadVersionRequest(span.context, 0, TransactionPriority::IMMEDIATE),
cx->taskID))) {
cx->minAcceptableReadVersion = std::min(cx->minAcceptableReadVersion, v.version);
if (v.midShardSize > 0)
cx->smoothMidShardSize.setTotal(v.midShardSize);
if (v.version >= version)
return v.version;
// SOMEDAY: Do the wait on the server side, possibly use less expensive source of committed version
// (causal consistency is not needed for this purpose)
wait(delay(CLIENT_KNOBS->FUTURE_VERSION_RETRY_DELAY, cx->taskID));
}
}
}
} catch (Error& e) {
TraceEvent(SevError, "WaitForCommittedVersionError").error(e);
throw;
}
}
ACTOR Future<Version> getRawVersion(Reference<TransactionState> trState) {
state Span span("NAPI:getRawVersion"_loc, { trState->spanID });
loop {
choose {
when(wait(trState->cx->onProxiesChanged())) {}
when(GetReadVersionReply v =
wait(basicLoadBalance(trState->cx->getGrvProxies(UseProvisionalProxies::False),
&GrvProxyInterface::getConsistentReadVersion,
GetReadVersionRequest(trState->spanID, 0, TransactionPriority::IMMEDIATE),
trState->cx->taskID))) {
return v.version;
}
}
}
}
ACTOR Future<Void> readVersionBatcher(
DatabaseContext* cx,
FutureStream<std::pair<Promise<GetReadVersionReply>, Optional<UID>>> versionStream,
uint32_t flags);
ACTOR Future<Version> watchValue(Database cx, Reference<const WatchParameters> parameters) {
state Span span("NAPI:watchValue"_loc, parameters->spanID);
state Version ver = parameters->version;
cx->validateVersion(parameters->version);
ASSERT(parameters->version != latestVersion);
loop {
state std::pair<KeyRange, Reference<LocationInfo>> ssi =
wait(getKeyLocation(cx,
parameters->key,
&StorageServerInterface::watchValue,
parameters->spanID,
parameters->debugID,
parameters->useProvisionalProxies));
try {
state Optional<UID> watchValueID = Optional<UID>();
if (parameters->debugID.present()) {
watchValueID = nondeterministicRandom()->randomUniqueID();
g_traceBatch.addAttach(
"WatchValueAttachID", parameters->debugID.get().first(), watchValueID.get().first());
g_traceBatch.addEvent("WatchValueDebug",
watchValueID.get().first(),
"NativeAPI.watchValue.Before"); //.detail("TaskID", g_network->getCurrentTask());
}
state WatchValueReply resp;
choose {
when(WatchValueReply r = wait(
loadBalance(cx.getPtr(),
ssi.second,
&StorageServerInterface::watchValue,
WatchValueRequest(span.context,
parameters->key,
parameters->value,
ver,
cx->sampleReadTags() ? parameters->tags : Optional<TagSet>(),
watchValueID),
TaskPriority::DefaultPromiseEndpoint))) {
resp = r;
}
when(wait(cx->connectionRecord ? cx->connectionRecord->onChange() : Never())) { wait(Never()); }
}
if (watchValueID.present()) {
g_traceBatch.addEvent("WatchValueDebug", watchValueID.get().first(), "NativeAPI.watchValue.After");
}
// FIXME: wait for known committed version on the storage server before replying,
// cannot do this until the storage server is notified on knownCommittedVersion changes from tlog (faster
// than the current update loop)
Version v = wait(waitForCommittedVersion(cx, resp.version, span.context));
// False if there is a master failure between getting the response and getting the committed version,
// Dependent on SERVER_KNOBS->MAX_VERSIONS_IN_FLIGHT
if (v - resp.version < 50000000) {
return resp.version;
}
ver = v;
} catch (Error& e) {
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_all_alternatives_failed) {
cx->invalidateCache(parameters->key);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, parameters->taskID));
} else if (e.code() == error_code_watch_cancelled || e.code() == error_code_process_behind) {
// clang-format off
TEST(e.code() == error_code_watch_cancelled); // Too many watches on the storage server, poll for changes instead
TEST(e.code() == error_code_process_behind); // The storage servers are all behind
// clang-format on
wait(delay(CLIENT_KNOBS->WATCH_POLLING_TIME, parameters->taskID));
} else if (e.code() == error_code_timed_out) { // The storage server occasionally times out watches in case
// it was cancelled
TEST(true); // A watch timed out
wait(delay(CLIENT_KNOBS->FUTURE_VERSION_RETRY_DELAY, parameters->taskID));
} else {
state Error err = e;
wait(delay(CLIENT_KNOBS->FUTURE_VERSION_RETRY_DELAY, parameters->taskID));
throw err;
}
}
}
}
ACTOR Future<Void> watchStorageServerResp(Key key, Database cx) {
loop {
try {
state Reference<WatchMetadata> metadata = cx->getWatchMetadata(key);
if (!metadata.isValid())
return Void();
Version watchVersion = wait(watchValue(cx, metadata->parameters));
metadata = cx->getWatchMetadata(key);
if (!metadata.isValid())
return Void();
// case 1: version_1 (SS) >= version_2 (map)
if (watchVersion >= metadata->parameters->version) {
cx->deleteWatchMetadata(key);
if (metadata->watchPromise.canBeSet())
metadata->watchPromise.send(watchVersion);
}
// ABA happens
else {
TEST(true); // ABA issue where the version returned from the server is less than the version in the map
// case 2: version_1 < version_2 and future_count == 1
if (metadata->watchPromise.getFutureReferenceCount() == 1) {
cx->deleteWatchMetadata(key);
}
}
} catch (Error& e) {
if (e.code() == error_code_operation_cancelled) {
throw e;
}
Reference<WatchMetadata> metadata = cx->getWatchMetadata(key);
if (!metadata.isValid()) {
return Void();
} else if (metadata->watchPromise.getFutureReferenceCount() == 1) {
cx->deleteWatchMetadata(key);
return Void();
} else if (e.code() == error_code_future_version) {
continue;
}
cx->deleteWatchMetadata(key);
metadata->watchPromise.sendError(e);
throw e;
}
}
}
ACTOR Future<Void> sameVersionDiffValue(Database cx, Reference<WatchParameters> parameters) {
state ReadYourWritesTransaction tr(cx);
loop {
try {
tr.setOption(FDBTransactionOptions::READ_SYSTEM_KEYS);
state Optional<Value> valSS = wait(tr.get(parameters->key));
Reference<WatchMetadata> metadata = cx->getWatchMetadata(parameters->key.contents());
// val_3 != val_1 (storage server value doesnt match value in map)
if (metadata.isValid() && valSS != metadata->parameters->value) {
cx->deleteWatchMetadata(parameters->key.contents());
metadata->watchPromise.send(parameters->version);
metadata->watchFutureSS.cancel();
}
// val_3 == val_2 (storage server value matches value passed into the function -> new watch)
if (valSS == parameters->value) {
metadata = makeReference<WatchMetadata>(parameters);
Key key = cx->setWatchMetadata(metadata);
metadata->watchFutureSS = watchStorageServerResp(key, cx);
}
// if val_3 != val_2
if (valSS != parameters->value)
return Void();
// val_3 == val_2
wait(success(metadata->watchPromise.getFuture()));
return Void();
} catch (Error& e) {
wait(tr.onError(e));
}
}
}
Future<Void> getWatchFuture(Database cx, Reference<WatchParameters> parameters) {
Reference<WatchMetadata> metadata = cx->getWatchMetadata(parameters->key.contents());
// case 1: key not in map
if (!metadata.isValid()) {
metadata = makeReference<WatchMetadata>(parameters);
Key key = cx->setWatchMetadata(metadata);
metadata->watchFutureSS = watchStorageServerResp(key, cx);
return success(metadata->watchPromise.getFuture());
}
// case 2: val_1 == val_2 (received watch with same value as key already in the map so just update)
else if (metadata->parameters->value == parameters->value) {
if (parameters->version > metadata->parameters->version) {
metadata->parameters = parameters;
}
return success(metadata->watchPromise.getFuture());
}
// case 3: val_1 != val_2 && version_2 > version_1 (received watch with different value and a higher version so
// recreate in SS)
else if (parameters->version > metadata->parameters->version) {
TEST(true); // Setting a watch that has a different value than the one in the map but a higher version (newer)
cx->deleteWatchMetadata(parameters->key);
metadata->watchPromise.send(parameters->version);
metadata->watchFutureSS.cancel();
metadata = makeReference<WatchMetadata>(parameters);
Key key = cx->setWatchMetadata(metadata);
metadata->watchFutureSS = watchStorageServerResp(key, cx);
return success(metadata->watchPromise.getFuture());
}
// case 5: val_1 != val_2 && version_1 == version_2 (received watch with different value but same version)
else if (metadata->parameters->version == parameters->version) {
TEST(true); // Setting a watch which has a different value than the one in the map but the same version
return sameVersionDiffValue(cx, parameters);
}
TEST(true); // Setting a watch which has a different value than the one in the map but a lower version (older)
// case 4: val_1 != val_2 && version_2 < version_1
return Void();
}
ACTOR Future<Void> watchValueMap(Future<Version> version,
Key key,
Optional<Value> value,
Database cx,
TagSet tags,
SpanID spanID,
TaskPriority taskID,
Optional<UID> debugID,
UseProvisionalProxies useProvisionalProxies) {
state Version ver = wait(version);
wait(getWatchFuture(
cx, makeReference<WatchParameters>(key, value, ver, tags, spanID, taskID, debugID, useProvisionalProxies)));
return Void();
}
template <class GetKeyValuesFamilyRequest>
void transformRangeLimits(GetRangeLimits limits, Reverse reverse, GetKeyValuesFamilyRequest& req) {
if (limits.bytes != 0) {
if (!limits.hasRowLimit())
req.limit = CLIENT_KNOBS->REPLY_BYTE_LIMIT; // Can't get more than this many rows anyway
else
req.limit = std::min(CLIENT_KNOBS->REPLY_BYTE_LIMIT, limits.rows);
if (reverse)
req.limit *= -1;
if (!limits.hasByteLimit())
req.limitBytes = CLIENT_KNOBS->REPLY_BYTE_LIMIT;
else
req.limitBytes = std::min(CLIENT_KNOBS->REPLY_BYTE_LIMIT, limits.bytes);
} else {
req.limitBytes = CLIENT_KNOBS->REPLY_BYTE_LIMIT;
req.limit = reverse ? -limits.minRows : limits.minRows;
}
}
template <class GetKeyValuesFamilyRequest>
RequestStream<GetKeyValuesFamilyRequest> StorageServerInterface::*getRangeRequestStream() {
if constexpr (std::is_same<GetKeyValuesFamilyRequest, GetKeyValuesRequest>::value) {
return &StorageServerInterface::getKeyValues;
} else if (std::is_same<GetKeyValuesFamilyRequest, GetKeyValuesAndFlatMapRequest>::value) {
return &StorageServerInterface::getKeyValuesAndFlatMap;
} else {
UNREACHABLE();
}
}
ACTOR template <class GetKeyValuesFamilyRequest, class GetKeyValuesFamilyReply>
Future<RangeResult> getExactRange(Reference<TransactionState> trState,
Version version,
KeyRange keys,
Key mapper,
GetRangeLimits limits,
Reverse reverse) {
state RangeResult output;
state Span span("NAPI:getExactRange"_loc, trState->spanID);
// printf("getExactRange( '%s', '%s' )\n", keys.begin.toString().c_str(), keys.end.toString().c_str());
loop {
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(trState,
keys,
CLIENT_KNOBS->GET_RANGE_SHARD_LIMIT,
reverse,
getRangeRequestStream<GetKeyValuesFamilyRequest>()));
ASSERT(locations.size());
state int shard = 0;
loop {
const KeyRangeRef& range = locations[shard].first;
GetKeyValuesFamilyRequest req;
req.mapper = mapper;
req.arena.dependsOn(mapper.arena());
req.version = version;
req.begin = firstGreaterOrEqual(range.begin);
req.end = firstGreaterOrEqual(range.end);
req.spanContext = span.context;
// keep shard's arena around in case of async tss comparison
req.arena.dependsOn(locations[shard].first.arena());
transformRangeLimits(limits, reverse, req);
ASSERT(req.limitBytes > 0 && req.limit != 0 && req.limit < 0 == reverse);
// FIXME: buggify byte limits on internal functions that use them, instead of globally
req.tags = trState->cx->sampleReadTags() ? trState->options.readTags : Optional<TagSet>();
req.debugID = trState->debugID;
try {
if (trState->debugID.present()) {
g_traceBatch.addEvent(
"TransactionDebug", trState->debugID.get().first(), "NativeAPI.getExactRange.Before");
/*TraceEvent("TransactionDebugGetExactRangeInfo", trState->debugID.get())
.detail("ReqBeginKey", req.begin.getKey())
.detail("ReqEndKey", req.end.getKey())
.detail("ReqLimit", req.limit)
.detail("ReqLimitBytes", req.limitBytes)
.detail("ReqVersion", req.version)
.detail("Reverse", reverse)
.detail("Servers", locations[shard].second->description());*/
}
++trState->cx->transactionPhysicalReads;
state GetKeyValuesFamilyReply rep;
try {
choose {
when(wait(trState->cx->connectionFileChanged())) { throw transaction_too_old(); }
when(GetKeyValuesFamilyReply _rep = wait(loadBalance(
trState->cx.getPtr(),
locations[shard].second,
getRangeRequestStream<GetKeyValuesFamilyRequest>(),
req,
TaskPriority::DefaultPromiseEndpoint,
AtMostOnce::False,
trState->cx->enableLocalityLoadBalance ? &trState->cx->queueModel : nullptr))) {
rep = _rep;
}
}
++trState->cx->transactionPhysicalReadsCompleted;
} catch (Error&) {
++trState->cx->transactionPhysicalReadsCompleted;
throw;
}
if (trState->debugID.present())
g_traceBatch.addEvent(
"TransactionDebug", trState->debugID.get().first(), "NativeAPI.getExactRange.After");
output.arena().dependsOn(rep.arena);
output.append(output.arena(), rep.data.begin(), rep.data.size());
if (limits.hasRowLimit() && rep.data.size() > limits.rows) {
TraceEvent(SevError, "GetExactRangeTooManyRows")
.detail("RowLimit", limits.rows)
.detail("DeliveredRows", output.size());
ASSERT(false);
}
limits.decrement(rep.data);
if (limits.isReached()) {
output.more = true;
return output;
}
bool more = rep.more;
// If the reply says there is more but we know that we finished the shard, then fix rep.more
if (reverse && more && rep.data.size() > 0 &&
output[output.size() - 1].key == locations[shard].first.begin)
more = false;
if (more) {
if (!rep.data.size()) {
TraceEvent(SevError, "GetExactRangeError")
.detail("Reason", "More data indicated but no rows present")
.detail("LimitBytes", limits.bytes)
.detail("LimitRows", limits.rows)
.detail("OutputSize", output.size())
.detail("OutputBytes", output.expectedSize())
.detail("BlockSize", rep.data.size())
.detail("BlockBytes", rep.data.expectedSize());
ASSERT(false);
}
TEST(true); // GetKeyValuesFamilyReply.more in getExactRange
// Make next request to the same shard with a beginning key just after the last key returned
if (reverse)
locations[shard].first =
KeyRangeRef(locations[shard].first.begin, output[output.size() - 1].key);
else
locations[shard].first =
KeyRangeRef(keyAfter(output[output.size() - 1].key), locations[shard].first.end);
}
if (!more || locations[shard].first.empty()) {
TEST(true); // getExactrange (!more || locations[shard].first.empty())
if (shard == locations.size() - 1) {
const KeyRangeRef& range = locations[shard].first;
KeyRef begin = reverse ? keys.begin : range.end;
KeyRef end = reverse ? range.begin : keys.end;
if (begin >= end) {
output.more = false;
return output;
}
TEST(true); // Multiple requests of key locations
keys = KeyRangeRef(begin, end);
break;
}
++shard;
}
// Soft byte limit - return results early if the user specified a byte limit and we got results
// This can prevent problems where the desired range spans many shards and would be too slow to
// fetch entirely.
if (limits.hasSatisfiedMinRows() && output.size() > 0) {
output.more = true;
return output;
}
} catch (Error& e) {
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_all_alternatives_failed) {
const KeyRangeRef& range = locations[shard].first;
if (reverse)
keys = KeyRangeRef(keys.begin, range.end);
else
keys = KeyRangeRef(range.begin, keys.end);
trState->cx->invalidateCache(keys);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, trState->taskID));
break;
} else {
TraceEvent(SevInfo, "GetExactRangeError")
.error(e)
.detail("ShardBegin", locations[shard].first.begin)
.detail("ShardEnd", locations[shard].first.end);
throw;
}
}
}
}
}
Future<Key> resolveKey(Reference<TransactionState> trState, KeySelector const& key, Version const& version) {
if (key.isFirstGreaterOrEqual())
return Future<Key>(key.getKey());
if (key.isFirstGreaterThan())
return Future<Key>(keyAfter(key.getKey()));
return getKey(trState, key, version);
}
ACTOR template <class GetKeyValuesFamilyRequest, class GetKeyValuesFamilyReply>
Future<RangeResult> getRangeFallback(Reference<TransactionState> trState,
Version version,
KeySelector begin,
KeySelector end,
Key mapper,
GetRangeLimits limits,
Reverse reverse) {
if (version == latestVersion) {
state Transaction transaction(trState->cx);
transaction.setOption(FDBTransactionOptions::CAUSAL_READ_RISKY);
transaction.setOption(FDBTransactionOptions::LOCK_AWARE);
transaction.setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
Version ver = wait(transaction.getReadVersion());
version = ver;
}
Future<Key> fb = resolveKey(trState, begin, version);
state Future<Key> fe = resolveKey(trState, end, version);
state Key b = wait(fb);
state Key e = wait(fe);
if (b >= e) {
return RangeResult();
}
// if e is allKeys.end, we have read through the end of the database
// if b is allKeys.begin, we have either read through the beginning of the database,
// or allKeys.begin exists in the database and will be part of the conflict range anyways
RangeResult _r = wait(getExactRange<GetKeyValuesFamilyRequest, GetKeyValuesFamilyReply>(
trState, version, KeyRangeRef(b, e), mapper, limits, reverse));
RangeResult r = _r;
if (b == allKeys.begin && ((reverse && !r.more) || !reverse))
r.readToBegin = true;
if (e == allKeys.end && ((!reverse && !r.more) || reverse))
r.readThroughEnd = true;
ASSERT(!limits.hasRowLimit() || r.size() <= limits.rows);
// If we were limiting bytes and the returned range is twice the request (plus 10K) log a warning
if (limits.hasByteLimit() &&
r.expectedSize() >
size_t(limits.bytes + CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT + CLIENT_KNOBS->VALUE_SIZE_LIMIT + 1) &&
limits.minRows == 0) {
TraceEvent(SevWarnAlways, "GetRangeFallbackTooMuchData")
.detail("LimitBytes", limits.bytes)
.detail("DeliveredBytes", r.expectedSize())
.detail("LimitRows", limits.rows)
.detail("DeliveredRows", r.size());
}
return r;
}
// TODO: Client should add mapped keys to conflict ranges.
void getRangeFinished(Reference<TransactionState> trState,
double startTime,
KeySelector begin,
KeySelector end,
Snapshot snapshot,
Promise<std::pair<Key, Key>> conflictRange,
Reverse reverse,
RangeResult result) {
int64_t bytes = 0;
for (const KeyValueRef& kv : result) {
bytes += kv.key.size() + kv.value.size();
}
trState->cx->transactionBytesRead += bytes;
trState->cx->transactionKeysRead += result.size();
if (trState->trLogInfo) {
trState->trLogInfo->addLog(FdbClientLogEvents::EventGetRange(
startTime, trState->cx->clientLocality.dcId(), now() - startTime, bytes, begin.getKey(), end.getKey()));
}
if (!snapshot) {
Key rangeBegin;
Key rangeEnd;
if (result.readToBegin) {
rangeBegin = allKeys.begin;
} else if (((!reverse || !result.more || begin.offset > 1) && begin.offset > 0) || result.size() == 0) {
rangeBegin = Key(begin.getKey(), begin.arena());
} else {
rangeBegin = reverse ? result.end()[-1].key : result[0].key;
}
if (end.offset > begin.offset && end.getKey() < rangeBegin) {
rangeBegin = Key(end.getKey(), end.arena());
}
if (result.readThroughEnd) {
rangeEnd = allKeys.end;
} else if (((reverse || !result.more || end.offset <= 0) && end.offset <= 1) || result.size() == 0) {
rangeEnd = Key(end.getKey(), end.arena());
} else {
rangeEnd = keyAfter(reverse ? result[0].key : result.end()[-1].key);
}
if (begin.offset < end.offset && begin.getKey() > rangeEnd) {
rangeEnd = Key(begin.getKey(), begin.arena());
}
conflictRange.send(std::make_pair(rangeBegin, rangeEnd));
}
}
// GetKeyValuesFamilyRequest: GetKeyValuesRequest or GetKeyValuesAndFlatMapRequest
// GetKeyValuesFamilyReply: GetKeyValuesReply or GetKeyValuesAndFlatMapReply
// Sadly we need GetKeyValuesFamilyReply because cannot do something like: state
// REPLY_TYPE(GetKeyValuesFamilyRequest) rep;
ACTOR template <class GetKeyValuesFamilyRequest, class GetKeyValuesFamilyReply>
Future<RangeResult> getRange(Reference<TransactionState> trState,
Future<Version> fVersion,
KeySelector begin,
KeySelector end,
Key mapper,
GetRangeLimits limits,
Promise<std::pair<Key, Key>> conflictRange,
Snapshot snapshot,
Reverse reverse) {
state GetRangeLimits originalLimits(limits);
state KeySelector originalBegin = begin;
state KeySelector originalEnd = end;
state RangeResult output;
state Span span("NAPI:getRange"_loc, trState->spanID);
try {
state Version version = wait(fVersion);
trState->cx->validateVersion(version);
state double startTime = now();
state Version readVersion = version; // Needed for latestVersion requests; if more, make future requests at the
// version that the first one completed
// FIXME: Is this really right? Weaken this and see if there is a problem;
// if so maybe there is a much subtler problem even with this.
if (begin.getKey() == allKeys.begin && begin.offset < 1) {
output.readToBegin = true;
begin = KeySelector(firstGreaterOrEqual(begin.getKey()), begin.arena());
}
ASSERT(!limits.isReached());
ASSERT((!limits.hasRowLimit() || limits.rows >= limits.minRows) && limits.minRows >= 0);
loop {
if (end.getKey() == allKeys.begin && (end.offset < 1 || end.isFirstGreaterOrEqual())) {
getRangeFinished(
trState, startTime, originalBegin, originalEnd, snapshot, conflictRange, reverse, output);
return output;
}
Key locationKey = reverse ? Key(end.getKey(), end.arena()) : Key(begin.getKey(), begin.arena());
Reverse locationBackward{ reverse ? (end - 1).isBackward() : begin.isBackward() };
state std::pair<KeyRange, Reference<LocationInfo>> beginServer = wait(getKeyLocation(
trState, locationKey, getRangeRequestStream<GetKeyValuesFamilyRequest>(), locationBackward));
state KeyRange shard = beginServer.first;
state bool modifiedSelectors = false;
state GetKeyValuesFamilyRequest req;
req.mapper = mapper;
req.arena.dependsOn(mapper.arena());
req.isFetchKeys = (trState->taskID == TaskPriority::FetchKeys);
req.version = readVersion;
// In case of async tss comparison, also make req arena depend on begin, end, and/or shard's arena depending
// on which is used
bool dependOnShard = false;
if (reverse && (begin - 1).isDefinitelyLess(shard.begin) &&
(!begin.isFirstGreaterOrEqual() ||
begin.getKey() != shard.begin)) { // In this case we would be setting modifiedSelectors to true, but
// not modifying anything
req.begin = firstGreaterOrEqual(shard.begin);
modifiedSelectors = true;
req.arena.dependsOn(shard.arena());
dependOnShard = true;
} else {
req.begin = begin;
req.arena.dependsOn(begin.arena());
}
if (!reverse && end.isDefinitelyGreater(shard.end)) {
req.end = firstGreaterOrEqual(shard.end);
modifiedSelectors = true;
if (!dependOnShard) {
req.arena.dependsOn(shard.arena());
}
} else {
req.end = end;
req.arena.dependsOn(end.arena());
}
transformRangeLimits(limits, reverse, req);
ASSERT(req.limitBytes > 0 && req.limit != 0 && req.limit < 0 == reverse);
req.tags = trState->cx->sampleReadTags() ? trState->options.readTags : Optional<TagSet>();
req.debugID = trState->debugID;
req.spanContext = span.context;
try {
if (trState->debugID.present()) {
g_traceBatch.addEvent(
"TransactionDebug", trState->debugID.get().first(), "NativeAPI.getRange.Before");
/*TraceEvent("TransactionDebugGetRangeInfo", trState->debugID.get())
.detail("ReqBeginKey", req.begin.getKey())
.detail("ReqEndKey", req.end.getKey())
.detail("OriginalBegin", originalBegin.toString())
.detail("OriginalEnd", originalEnd.toString())
.detail("Begin", begin.toString())
.detail("End", end.toString())
.detail("Shard", shard)
.detail("ReqLimit", req.limit)
.detail("ReqLimitBytes", req.limitBytes)
.detail("ReqVersion", req.version)
.detail("Reverse", reverse)
.detail("ModifiedSelectors", modifiedSelectors)
.detail("Servers", beginServer.second->description());*/
}
++trState->cx->transactionPhysicalReads;
state GetKeyValuesFamilyReply rep;
try {
if (CLIENT_BUGGIFY_WITH_PROB(.01)) {
throw deterministicRandom()->randomChoice(
std::vector<Error>{ transaction_too_old(), future_version() });
}
// state AnnotateActor annotation(currentLineage);
GetKeyValuesFamilyReply _rep =
wait(loadBalance(trState->cx.getPtr(),
beginServer.second,
getRangeRequestStream<GetKeyValuesFamilyRequest>(),
req,
TaskPriority::DefaultPromiseEndpoint,
AtMostOnce::False,
trState->cx->enableLocalityLoadBalance ? &trState->cx->queueModel : nullptr));
rep = _rep;
++trState->cx->transactionPhysicalReadsCompleted;
} catch (Error&) {
++trState->cx->transactionPhysicalReadsCompleted;
throw;
}
if (trState->debugID.present()) {
g_traceBatch.addEvent("TransactionDebug",
trState->debugID.get().first(),
"NativeAPI.getRange.After"); //.detail("SizeOf", rep.data.size());
/*TraceEvent("TransactionDebugGetRangeDone", trState->debugID.get())
.detail("ReqBeginKey", req.begin.getKey())
.detail("ReqEndKey", req.end.getKey())
.detail("RepIsMore", rep.more)
.detail("VersionReturned", rep.version)
.detail("RowsReturned", rep.data.size());*/
}
ASSERT(!rep.more || rep.data.size());
ASSERT(!limits.hasRowLimit() || rep.data.size() <= limits.rows);
limits.decrement(rep.data);
if (reverse && begin.isLastLessOrEqual() && rep.data.size() &&
rep.data.end()[-1].key == begin.getKey()) {
modifiedSelectors = false;
}
bool finished = limits.isReached() || (!modifiedSelectors && !rep.more) || limits.hasSatisfiedMinRows();
bool readThrough = modifiedSelectors && !rep.more;
// optimization: first request got all data--just return it
if (finished && !output.size()) {
bool readToBegin = output.readToBegin;
bool readThroughEnd = output.readThroughEnd;
output = RangeResult(RangeResultRef(rep.data, modifiedSelectors || limits.isReached() || rep.more),
rep.arena);
output.readToBegin = readToBegin;
output.readThroughEnd = readThroughEnd;
if (BUGGIFY && limits.hasByteLimit() && output.size() > std::max(1, originalLimits.minRows)) {
// Copy instead of resizing because TSS maybe be using output's arena for comparison. This only
// happens in simulation so it's fine
RangeResult copy;
int newSize =
deterministicRandom()->randomInt(std::max(1, originalLimits.minRows), output.size());
for (int i = 0; i < newSize; i++) {
copy.push_back_deep(copy.arena(), output[i]);
}
output = copy;
output.more = true;
getRangeFinished(
trState, startTime, originalBegin, originalEnd, snapshot, conflictRange, reverse, output);
return output;
}
if (readThrough) {
output.arena().dependsOn(shard.arena());
output.readThrough = reverse ? shard.begin : shard.end;
}
getRangeFinished(
trState, startTime, originalBegin, originalEnd, snapshot, conflictRange, reverse, output);
return output;
}
output.arena().dependsOn(rep.arena);
output.append(output.arena(), rep.data.begin(), rep.data.size());
if (finished) {
if (readThrough) {
output.arena().dependsOn(shard.arena());
output.readThrough = reverse ? shard.begin : shard.end;
}
output.more = modifiedSelectors || limits.isReached() || rep.more;
getRangeFinished(
trState, startTime, originalBegin, originalEnd, snapshot, conflictRange, reverse, output);
return output;
}
readVersion = rep.version; // see above comment
if (!rep.more) {
ASSERT(modifiedSelectors);
TEST(true); // !GetKeyValuesFamilyReply.more and modifiedSelectors in getRange
if (!rep.data.size()) {
RangeResult result = wait(getRangeFallback<GetKeyValuesFamilyRequest, GetKeyValuesFamilyReply>(
trState, version, originalBegin, originalEnd, mapper, originalLimits, reverse));
getRangeFinished(
trState, startTime, originalBegin, originalEnd, snapshot, conflictRange, reverse, result);
return result;
}
if (reverse)
end = firstGreaterOrEqual(shard.begin);
else
begin = firstGreaterOrEqual(shard.end);
} else {
TEST(true); // GetKeyValuesFamilyReply.more in getRange
if (reverse)
end = firstGreaterOrEqual(output[output.size() - 1].key);
else
begin = firstGreaterThan(output[output.size() - 1].key);
}
} catch (Error& e) {
if (trState->debugID.present()) {
g_traceBatch.addEvent(
"TransactionDebug", trState->debugID.get().first(), "NativeAPI.getRange.Error");
TraceEvent("TransactionDebugError", trState->debugID.get()).error(e);
}
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_all_alternatives_failed ||
(e.code() == error_code_transaction_too_old && readVersion == latestVersion)) {
trState->cx->invalidateCache(reverse ? end.getKey() : begin.getKey(),
Reverse{ reverse ? (end - 1).isBackward() : begin.isBackward() });
if (e.code() == error_code_wrong_shard_server) {
RangeResult result = wait(getRangeFallback<GetKeyValuesFamilyRequest, GetKeyValuesFamilyReply>(
trState, version, originalBegin, originalEnd, mapper, originalLimits, reverse));
getRangeFinished(
trState, startTime, originalBegin, originalEnd, snapshot, conflictRange, reverse, result);
return result;
}
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, trState->taskID));
} else {
if (trState->trLogInfo)
trState->trLogInfo->addLog(
FdbClientLogEvents::EventGetRangeError(startTime,
trState->cx->clientLocality.dcId(),
static_cast<int>(e.code()),
begin.getKey(),
end.getKey()));
throw e;
}
}
}
} catch (Error& e) {
if (conflictRange.canBeSet()) {
conflictRange.send(std::make_pair(Key(), Key()));
}
throw;
}
}
template <class StreamReply>
struct TSSDuplicateStreamData {
PromiseStream<StreamReply> stream;
Promise<Void> tssComparisonDone;
// empty constructor for optional?
TSSDuplicateStreamData() {}
TSSDuplicateStreamData(PromiseStream<StreamReply> stream) : stream(stream) {}
bool done() { return tssComparisonDone.getFuture().isReady(); }
void setDone() {
if (tssComparisonDone.canBeSet()) {
tssComparisonDone.send(Void());
}
}
~TSSDuplicateStreamData() {}
};
// Error tracking here is weird, and latency doesn't really mean the same thing here as it does with normal tss
// comparisons, so this is pretty much just counting mismatches
ACTOR template <class Request>
static Future<Void> tssStreamComparison(Request request,
TSSDuplicateStreamData<REPLYSTREAM_TYPE(Request)> streamData,
ReplyPromiseStream<REPLYSTREAM_TYPE(Request)> tssReplyStream,
TSSEndpointData tssData) {
state bool ssEndOfStream = false;
state bool tssEndOfStream = false;
state Optional<REPLYSTREAM_TYPE(Request)> ssReply = Optional<REPLYSTREAM_TYPE(Request)>();
state Optional<REPLYSTREAM_TYPE(Request)> tssReply = Optional<REPLYSTREAM_TYPE(Request)>();
loop {
// reset replies
ssReply = Optional<REPLYSTREAM_TYPE(Request)>();
tssReply = Optional<REPLYSTREAM_TYPE(Request)>();
state double startTime = now();
// wait for ss response
try {
REPLYSTREAM_TYPE(Request) _ssReply = waitNext(streamData.stream.getFuture());
ssReply = _ssReply;
} catch (Error& e) {
if (e.code() == error_code_actor_cancelled) {
streamData.setDone();
throw;
}
if (e.code() == error_code_end_of_stream) {
// ss response will be set to empty, to compare to the SS response if it wasn't empty and cause a
// mismatch
ssEndOfStream = true;
} else {
tssData.metrics->ssError(e.code());
}
TEST(e.code() != error_code_end_of_stream); // SS got error in TSS stream comparison
}
state double sleepTime = std::max(startTime + FLOW_KNOBS->LOAD_BALANCE_TSS_TIMEOUT - now(), 0.0);
// wait for tss response
try {
choose {
when(REPLYSTREAM_TYPE(Request) _tssReply = waitNext(tssReplyStream.getFuture())) {
tssReply = _tssReply;
}
when(wait(delay(sleepTime))) {
++tssData.metrics->tssTimeouts;
TEST(true); // Got TSS timeout in stream comparison
}
}
} catch (Error& e) {
if (e.code() == error_code_actor_cancelled) {
streamData.setDone();
throw;
}
if (e.code() == error_code_end_of_stream) {
// tss response will be set to empty, to compare to the SS response if it wasn't empty and cause a
// mismatch
tssEndOfStream = true;
} else {
tssData.metrics->tssError(e.code());
}
TEST(e.code() != error_code_end_of_stream); // TSS got error in TSS stream comparison
}
if (!ssEndOfStream || !tssEndOfStream) {
++tssData.metrics->streamComparisons;
}
// if both are successful, compare
if (ssReply.present() && tssReply.present()) {
// compare results
// FIXME: this code is pretty much identical to LoadBalance.h
// TODO could add team check logic in if we added synchronous way to turn this into a fixed getRange request
// and send it to the whole team and compare? I think it's fine to skip that for streaming though
TEST(ssEndOfStream != tssEndOfStream); // SS or TSS stream finished early!
// skip tss comparison if both are end of stream
if ((!ssEndOfStream || !tssEndOfStream) && !TSS_doCompare(ssReply.get(), tssReply.get())) {
TEST(true); // TSS mismatch in stream comparison
TraceEvent mismatchEvent(
(g_network->isSimulated() && g_simulator.tssMode == ISimulator::TSSMode::EnabledDropMutations)
? SevWarnAlways
: SevError,
TSS_mismatchTraceName(request));
mismatchEvent.setMaxEventLength(FLOW_KNOBS->TSS_LARGE_TRACE_SIZE);
mismatchEvent.detail("TSSID", tssData.tssId);
if (tssData.metrics->shouldRecordDetailedMismatch()) {
TSS_traceMismatch(mismatchEvent, request, ssReply.get(), tssReply.get());
TEST(FLOW_KNOBS
->LOAD_BALANCE_TSS_MISMATCH_TRACE_FULL); // Tracing Full TSS Mismatch in stream comparison
TEST(!FLOW_KNOBS->LOAD_BALANCE_TSS_MISMATCH_TRACE_FULL); // Tracing Partial TSS Mismatch in stream
// comparison and storing the rest in FDB
if (!FLOW_KNOBS->LOAD_BALANCE_TSS_MISMATCH_TRACE_FULL) {
mismatchEvent.disable();
UID mismatchUID = deterministicRandom()->randomUniqueID();
tssData.metrics->recordDetailedMismatchData(mismatchUID, mismatchEvent.getFields().toString());
// record a summarized trace event instead
TraceEvent summaryEvent((g_network->isSimulated() &&
g_simulator.tssMode == ISimulator::TSSMode::EnabledDropMutations)
? SevWarnAlways
: SevError,
TSS_mismatchTraceName(request));
summaryEvent.detail("TSSID", tssData.tssId).detail("MismatchId", mismatchUID);
}
} else {
// don't record trace event
mismatchEvent.disable();
}
streamData.setDone();
return Void();
}
}
if (!ssReply.present() || !tssReply.present() || ssEndOfStream || tssEndOfStream) {
// if both streams don't still have more data, stop comparison
streamData.setDone();
return Void();
}
}
}
// Currently only used for GetKeyValuesStream but could easily be plugged for other stream types
// User of the stream has to forward the SS's responses to the returned promise stream, if it is set
template <class Request>
Optional<TSSDuplicateStreamData<REPLYSTREAM_TYPE(Request)>>
maybeDuplicateTSSStreamFragment(Request& req, QueueModel* model, RequestStream<Request> const* ssStream) {
if (model) {
Optional<TSSEndpointData> tssData = model->getTssData(ssStream->getEndpoint().token.first());
if (tssData.present()) {
TEST(true); // duplicating stream to TSS
resetReply(req);
// FIXME: optimize to avoid creating new netNotifiedQueueWithAcknowledgements for each stream duplication
RequestStream<Request> tssRequestStream(tssData.get().endpoint);
ReplyPromiseStream<REPLYSTREAM_TYPE(Request)> tssReplyStream = tssRequestStream.getReplyStream(req);
PromiseStream<REPLYSTREAM_TYPE(Request)> ssDuplicateReplyStream;
TSSDuplicateStreamData<REPLYSTREAM_TYPE(Request)> streamData(ssDuplicateReplyStream);
model->addActor.send(tssStreamComparison(req, streamData, tssReplyStream, tssData.get()));
return Optional<TSSDuplicateStreamData<REPLYSTREAM_TYPE(Request)>>(streamData);
}
}
return Optional<TSSDuplicateStreamData<REPLYSTREAM_TYPE(Request)>>();
}
// Streams all of the KV pairs in a target key range into a ParallelStream fragment
ACTOR Future<Void> getRangeStreamFragment(Reference<TransactionState> trState,
ParallelStream<RangeResult>::Fragment* results,
Version version,
KeyRange keys,
GetRangeLimits limits,
Snapshot snapshot,
Reverse reverse,
SpanID spanContext) {
loop {
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations = wait(getKeyRangeLocations(
trState, keys, CLIENT_KNOBS->GET_RANGE_SHARD_LIMIT, reverse, &StorageServerInterface::getKeyValuesStream));
ASSERT(locations.size());
state int shard = 0;
loop {
const KeyRange& range = locations[shard].first;
state Optional<TSSDuplicateStreamData<GetKeyValuesStreamReply>> tssDuplicateStream;
state GetKeyValuesStreamRequest req;
req.version = version;
req.begin = firstGreaterOrEqual(range.begin);
req.end = firstGreaterOrEqual(range.end);
req.spanContext = spanContext;
req.limit = reverse ? -CLIENT_KNOBS->REPLY_BYTE_LIMIT : CLIENT_KNOBS->REPLY_BYTE_LIMIT;
req.limitBytes = std::numeric_limits<int>::max();
// keep shard's arena around in case of async tss comparison
req.arena.dependsOn(range.arena());
ASSERT(req.limitBytes > 0 && req.limit != 0 && req.limit < 0 == reverse);
// FIXME: buggify byte limits on internal functions that use them, instead of globally
req.tags = trState->cx->sampleReadTags() ? trState->options.readTags : Optional<TagSet>();
req.debugID = trState->debugID;
try {
if (trState->debugID.present()) {
g_traceBatch.addEvent(
"TransactionDebug", trState->debugID.get().first(), "NativeAPI.RangeStream.Before");
}
++trState->cx->transactionPhysicalReads;
state GetKeyValuesStreamReply rep;
if (locations[shard].second->size() == 0) {
wait(trState->cx->connectionFileChanged());
results->sendError(transaction_too_old());
return Void();
}
state int useIdx = -1;
loop {
// FIXME: create a load balance function for this code so future users of reply streams do not have
// to duplicate this code
int count = 0;
for (int i = 0; i < locations[shard].second->size(); i++) {
if (!IFailureMonitor::failureMonitor()
.getState(locations[shard]
.second->get(i, &StorageServerInterface::getKeyValuesStream)
.getEndpoint())
.failed) {
if (deterministicRandom()->random01() <= 1.0 / ++count) {
useIdx = i;
}
}
}
if (useIdx >= 0) {
break;
}
std::vector<Future<Void>> ok(locations[shard].second->size());
for (int i = 0; i < ok.size(); i++) {
ok[i] = IFailureMonitor::failureMonitor().onStateEqual(
locations[shard].second->get(i, &StorageServerInterface::getKeyValuesStream).getEndpoint(),
FailureStatus(false));
}
// Making this SevWarn means a lot of clutter
if (now() - g_network->networkInfo.newestAlternativesFailure > 1 ||
deterministicRandom()->random01() < 0.01) {
TraceEvent("AllAlternativesFailed")
.detail("Alternatives", locations[shard].second->description());
}
wait(allAlternativesFailedDelay(quorum(ok, 1)));
}
state ReplyPromiseStream<GetKeyValuesStreamReply> replyStream =
locations[shard]
.second->get(useIdx, &StorageServerInterface::getKeyValuesStream)
.getReplyStream(req);
tssDuplicateStream = maybeDuplicateTSSStreamFragment(
req,
trState->cx->enableLocalityLoadBalance ? &trState->cx->queueModel : nullptr,
&locations[shard].second->get(useIdx, &StorageServerInterface::getKeyValuesStream));
state bool breakAgain = false;
loop {
wait(results->onEmpty());
try {
choose {
when(wait(trState->cx->connectionFileChanged())) {
results->sendError(transaction_too_old());
if (tssDuplicateStream.present() && !tssDuplicateStream.get().done()) {
tssDuplicateStream.get().stream.sendError(transaction_too_old());
}
return Void();
}
when(GetKeyValuesStreamReply _rep = waitNext(replyStream.getFuture())) { rep = _rep; }
}
++trState->cx->transactionPhysicalReadsCompleted;
} catch (Error& e) {
++trState->cx->transactionPhysicalReadsCompleted;
if (e.code() == error_code_broken_promise) {
if (tssDuplicateStream.present() && !tssDuplicateStream.get().done()) {
tssDuplicateStream.get().stream.sendError(connection_failed());
}
throw connection_failed();
}
if (e.code() != error_code_end_of_stream) {
if (tssDuplicateStream.present() && !tssDuplicateStream.get().done()) {
tssDuplicateStream.get().stream.sendError(e);
}
throw;
}
rep = GetKeyValuesStreamReply();
}
if (trState->debugID.present())
g_traceBatch.addEvent(
"TransactionDebug", trState->debugID.get().first(), "NativeAPI.getExactRange.After");
RangeResult output(RangeResultRef(rep.data, rep.more), rep.arena);
if (tssDuplicateStream.present() && !tssDuplicateStream.get().done()) {
// shallow copy the reply with an arena depends, and send it to the duplicate stream for TSS
GetKeyValuesStreamReply replyCopy;
replyCopy.version = rep.version;
replyCopy.more = rep.more;
replyCopy.cached = rep.cached;
replyCopy.arena.dependsOn(rep.arena);
replyCopy.data.append(replyCopy.arena, rep.data.begin(), rep.data.size());
tssDuplicateStream.get().stream.send(replyCopy);
}
int64_t bytes = 0;
for (const KeyValueRef& kv : output) {
bytes += kv.key.size() + kv.value.size();
}
trState->cx->transactionBytesRead += bytes;
trState->cx->transactionKeysRead += output.size();
// If the reply says there is more but we know that we finished the shard, then fix rep.more
if (reverse && output.more && rep.data.size() > 0 &&
output[output.size() - 1].key == locations[shard].first.begin) {
output.more = false;
}
if (output.more) {
if (!rep.data.size()) {
TraceEvent(SevError, "GetRangeStreamError")
.detail("Reason", "More data indicated but no rows present")
.detail("LimitBytes", limits.bytes)
.detail("LimitRows", limits.rows)
.detail("OutputSize", output.size())
.detail("OutputBytes", output.expectedSize())
.detail("BlockSize", rep.data.size())
.detail("BlockBytes", rep.data.expectedSize());
ASSERT(false);
}
TEST(true); // GetKeyValuesStreamReply.more in getRangeStream
// Make next request to the same shard with a beginning key just after the last key returned
if (reverse)
locations[shard].first =
KeyRangeRef(locations[shard].first.begin, output[output.size() - 1].key);
else
locations[shard].first =
KeyRangeRef(keyAfter(output[output.size() - 1].key), locations[shard].first.end);
}
if (locations[shard].first.empty()) {
output.more = false;
}
if (!output.more) {
const KeyRange& range = locations[shard].first;
if (shard == locations.size() - 1) {
KeyRef begin = reverse ? keys.begin : range.end;
KeyRef end = reverse ? range.begin : keys.end;
if (begin >= end) {
if (range.begin == allKeys.begin) {
output.readToBegin = true;
}
if (range.end == allKeys.end) {
output.readThroughEnd = true;
}
output.arena().dependsOn(keys.arena());
output.readThrough = reverse ? keys.begin : keys.end;
results->send(std::move(output));
results->finish();
if (tssDuplicateStream.present() && !tssDuplicateStream.get().done()) {
tssDuplicateStream.get().stream.sendError(end_of_stream());
}
return Void();
}
keys = KeyRangeRef(begin, end);
breakAgain = true;
} else {
++shard;
}
output.arena().dependsOn(range.arena());
output.readThrough = reverse ? range.begin : range.end;
results->send(std::move(output));
break;
}
ASSERT(output.size());
if (keys.begin == allKeys.begin && !reverse) {
output.readToBegin = true;
}
if (keys.end == allKeys.end && reverse) {
output.readThroughEnd = true;
}
results->send(std::move(output));
}
if (breakAgain) {
break;
}
} catch (Error& e) {
// send errors to tss duplicate stream, including actor_cancelled
if (tssDuplicateStream.present() && !tssDuplicateStream.get().done()) {
tssDuplicateStream.get().stream.sendError(e);
}
if (e.code() == error_code_actor_cancelled) {
throw;
}
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_all_alternatives_failed ||
e.code() == error_code_connection_failed) {
const KeyRangeRef& range = locations[shard].first;
if (reverse)
keys = KeyRangeRef(keys.begin, range.end);
else
keys = KeyRangeRef(range.begin, keys.end);
trState->cx->invalidateCache(keys);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, trState->taskID));
break;
} else {
results->sendError(e);
return Void();
}
}
}
}
}
ACTOR Future<Standalone<VectorRef<KeyRef>>> getRangeSplitPoints(Reference<TransactionState> trState,
KeyRange keys,
int64_t chunkSize);
static KeyRange intersect(KeyRangeRef lhs, KeyRangeRef rhs) {
return KeyRange(KeyRangeRef(std::max(lhs.begin, rhs.begin), std::min(lhs.end, rhs.end)));
}
// Divides the requested key range into 1MB fragments, create range streams for each fragment, and merges the results so
// the client get them in order
ACTOR Future<Void> getRangeStream(Reference<TransactionState> trState,
PromiseStream<RangeResult> _results,
Future<Version> fVersion,
KeySelector begin,
KeySelector end,
GetRangeLimits limits,
Promise<std::pair<Key, Key>> conflictRange,
Snapshot snapshot,
Reverse reverse) {
state ParallelStream<RangeResult> results(_results, CLIENT_KNOBS->RANGESTREAM_BUFFERED_FRAGMENTS_LIMIT);
// FIXME: better handling to disable row limits
ASSERT(!limits.hasRowLimit());
state Span span("NAPI:getRangeStream"_loc, trState->spanID);
state Version version = wait(fVersion);
trState->cx->validateVersion(version);
Future<Key> fb = resolveKey(trState, begin, version);
state Future<Key> fe = resolveKey(trState, end, version);
state Key b = wait(fb);
state Key e = wait(fe);
if (!snapshot) {
// FIXME: this conflict range is too large, and should be updated continously as results are returned
conflictRange.send(std::make_pair(std::min(b, Key(begin.getKey(), begin.arena())),
std::max(e, Key(end.getKey(), end.arena()))));
}
if (b >= e) {
wait(results.finish());
return Void();
}
// if e is allKeys.end, we have read through the end of the database
// if b is allKeys.begin, we have either read through the beginning of the database,
// or allKeys.begin exists in the database and will be part of the conflict range anyways
state std::vector<Future<Void>> outstandingRequests;
while (b < e) {
state std::pair<KeyRange, Reference<LocationInfo>> ssi =
wait(getKeyLocation(trState, reverse ? e : b, &StorageServerInterface::getKeyValuesStream, reverse));
state KeyRange shardIntersection = intersect(ssi.first, KeyRangeRef(b, e));
state Standalone<VectorRef<KeyRef>> splitPoints =
wait(getRangeSplitPoints(trState, shardIntersection, CLIENT_KNOBS->RANGESTREAM_FRAGMENT_SIZE));
state std::vector<KeyRange> toSend;
// state std::vector<Future<std::list<KeyRangeRef>::iterator>> outstandingRequests;
if (!splitPoints.empty()) {
toSend.push_back(KeyRange(KeyRangeRef(shardIntersection.begin, splitPoints.front()), splitPoints.arena()));
for (int i = 0; i < splitPoints.size() - 1; ++i) {
toSend.push_back(KeyRange(KeyRangeRef(splitPoints[i], splitPoints[i + 1]), splitPoints.arena()));
}
toSend.push_back(KeyRange(KeyRangeRef(splitPoints.back(), shardIntersection.end), splitPoints.arena()));
} else {
toSend.push_back(KeyRange(KeyRangeRef(shardIntersection.begin, shardIntersection.end)));
}
state int idx = 0;
state int useIdx = 0;
for (; idx < toSend.size(); ++idx) {
useIdx = reverse ? toSend.size() - idx - 1 : idx;
if (toSend[useIdx].empty()) {
continue;
}
ParallelStream<RangeResult>::Fragment* fragment = wait(results.createFragment());
outstandingRequests.push_back(getRangeStreamFragment(
trState, fragment, version, toSend[useIdx], limits, snapshot, reverse, span.context));
}
if (reverse) {
e = shardIntersection.begin;
} else {
b = shardIntersection.end;
}
}
wait(waitForAll(outstandingRequests) && results.finish());
return Void();
}
Future<RangeResult> getRange(Reference<TransactionState> const& trState,
Future<Version> const& fVersion,
KeySelector const& begin,
KeySelector const& end,
GetRangeLimits const& limits,
Reverse const& reverse) {
return getRange<GetKeyValuesRequest, GetKeyValuesReply>(
trState, fVersion, begin, end, ""_sr, limits, Promise<std::pair<Key, Key>>(), Snapshot::True, reverse);
}
bool DatabaseContext::debugUseTags = false;
const std::vector<std::string> DatabaseContext::debugTransactionTagChoices = { "a", "b", "c", "d", "e", "f", "g",
"h", "i", "j", "k", "l", "m", "n",
"o", "p", "q", "r", "s", "t" };
void debugAddTags(Reference<TransactionState> trState) {
int numTags = deterministicRandom()->randomInt(0, CLIENT_KNOBS->MAX_TAGS_PER_TRANSACTION + 1);
for (int i = 0; i < numTags; ++i) {
TransactionTag tag;
if (deterministicRandom()->random01() < 0.7) {
tag = TransactionTagRef(deterministicRandom()->randomChoice(DatabaseContext::debugTransactionTagChoices));
} else {
int length = deterministicRandom()->randomInt(1, CLIENT_KNOBS->MAX_TRANSACTION_TAG_LENGTH + 1);
uint8_t* s = new (tag.arena()) uint8_t[length];
for (int j = 0; j < length; ++j) {
s[j] = (uint8_t)deterministicRandom()->randomInt(0, 256);
}
tag.contents() = TransactionTagRef(s, length);
}
if (deterministicRandom()->coinflip()) {
trState->options.readTags.addTag(tag);
}
trState->options.tags.addTag(tag);
}
}
Transaction::Transaction()
: trState(makeReference<TransactionState>(TaskPriority::DefaultEndpoint, generateSpanID(false))) {}
Transaction::Transaction(Database const& cx)
: trState(makeReference<TransactionState>(cx,
cx->taskID,
generateSpanID(cx->transactionTracingSample),
createTrLogInfoProbabilistically(cx))),
span(trState->spanID, "Transaction"_loc), backoff(CLIENT_KNOBS->DEFAULT_BACKOFF), tr(trState->spanID) {
if (DatabaseContext::debugUseTags) {
debugAddTags(trState);
}
}
Transaction::~Transaction() {
flushTrLogsIfEnabled();
cancelWatches();
}
void Transaction::operator=(Transaction&& r) noexcept {
flushTrLogsIfEnabled();
tr = std::move(r.tr);
readVersion = std::move(r.readVersion);
trState = std::move(r.trState);
metadataVersion = std::move(r.metadataVersion);
extraConflictRanges = std::move(r.extraConflictRanges);
commitResult = std::move(r.commitResult);
committing = std::move(r.committing);
backoff = r.backoff;
watches = r.watches;
}
void Transaction::flushTrLogsIfEnabled() {
if (trState && trState->trLogInfo && trState->trLogInfo->logsAdded && trState->trLogInfo->trLogWriter.getData()) {
ASSERT(trState->trLogInfo->flushed == false);
trState->cx->clientStatusUpdater.inStatusQ.push_back(
{ trState->trLogInfo->identifier, std::move(trState->trLogInfo->trLogWriter) });
trState->trLogInfo->flushed = true;
}
}
void Transaction::setVersion(Version v) {
trState->startTime = now();
if (readVersion.isValid())
throw read_version_already_set();
if (v <= 0)
throw version_invalid();
readVersion = v;
}
Future<Optional<Value>> Transaction::get(const Key& key, Snapshot snapshot) {
++trState->cx->transactionLogicalReads;
++trState->cx->transactionGetValueRequests;
// ASSERT (key < allKeys.end);
// There are no keys in the database with size greater than KEY_SIZE_LIMIT
if (key.size() >
(key.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
return Optional<Value>();
auto ver = getReadVersion();
/* if (!systemKeys.contains(key))
return Optional<Value>(Value()); */
if (!snapshot)
tr.transaction.read_conflict_ranges.push_back(tr.arena, singleKeyRange(key, tr.arena));
if (key == metadataVersionKey) {
++trState->cx->transactionMetadataVersionReads;
if (!ver.isReady() || metadataVersion.isSet()) {
return metadataVersion.getFuture();
} else {
if (ver.isError())
return ver.getError();
if (ver.get() == trState->cx->metadataVersionCache[trState->cx->mvCacheInsertLocation].first) {
return trState->cx->metadataVersionCache[trState->cx->mvCacheInsertLocation].second;
}
Version v = ver.get();
int hi = trState->cx->mvCacheInsertLocation;
int lo = (trState->cx->mvCacheInsertLocation + 1) % trState->cx->metadataVersionCache.size();
while (hi != lo) {
int cu = hi > lo ? (hi + lo) / 2
: ((hi + trState->cx->metadataVersionCache.size() + lo) / 2) %
trState->cx->metadataVersionCache.size();
if (v == trState->cx->metadataVersionCache[cu].first) {
return trState->cx->metadataVersionCache[cu].second;
}
if (cu == lo) {
break;
}
if (v < trState->cx->metadataVersionCache[cu].first) {
hi = cu;
} else {
lo = (cu + 1) % trState->cx->metadataVersionCache.size();
}
}
}
}
return getValue(trState, key, ver);
}
void Watch::setWatch(Future<Void> watchFuture) {
this->watchFuture = watchFuture;
// Cause the watch loop to go around and start waiting on watchFuture
onSetWatchTrigger.send(Void());
}
// FIXME: This seems pretty horrible. Now a Database can't die until all of its watches do...
ACTOR Future<Void> watch(Reference<Watch> watch,
Database cx,
TagSet tags,
SpanID spanID,
TaskPriority taskID,
Optional<UID> debugID,
UseProvisionalProxies useProvisionalProxies) {
try {
choose {
// RYOW write to value that is being watched (if applicable)
// Errors
when(wait(watch->onChangeTrigger.getFuture())) {}
// NativeAPI finished commit and updated watchFuture
when(wait(watch->onSetWatchTrigger.getFuture())) {
loop {
choose {
// NativeAPI watchValue future finishes or errors
when(wait(watch->watchFuture)) { break; }
when(wait(cx->connectionFileChanged())) {
TEST(true); // Recreated a watch after switch
cx->clearWatchMetadata();
watch->watchFuture = watchValueMap(cx->minAcceptableReadVersion,
watch->key,
watch->value,
cx,
tags,
spanID,
taskID,
debugID,
useProvisionalProxies);
}
}
}
}
}
} catch (Error& e) {
cx->removeWatch();
throw;
}
cx->removeWatch();
return Void();
}
Future<Version> Transaction::getRawReadVersion() {
return ::getRawVersion(trState);
}
Future<Void> Transaction::watch(Reference<Watch> watch) {
++trState->cx->transactionWatchRequests;
trState->cx->addWatch();
watches.push_back(watch);
return ::watch(watch,
trState->cx,
trState->options.readTags,
trState->spanID,
trState->taskID,
trState->debugID,
trState->useProvisionalProxies);
}
ACTOR Future<Standalone<VectorRef<const char*>>> getAddressesForKeyActor(Reference<TransactionState> trState,
Future<Version> ver,
Key key) {
state std::vector<StorageServerInterface> ssi;
// If key >= allKeys.end, then getRange will return a kv-pair with an empty value. This will result in our
// serverInterfaces vector being empty, which will cause us to return an empty addresses list.
state Key ksKey = keyServersKey(key);
state RangeResult serverTagResult = wait(getRange(trState,
ver,
lastLessOrEqual(serverTagKeys.begin),
firstGreaterThan(serverTagKeys.end),
GetRangeLimits(CLIENT_KNOBS->TOO_MANY),
Reverse::False));
ASSERT(!serverTagResult.more && serverTagResult.size() < CLIENT_KNOBS->TOO_MANY);
Future<RangeResult> futureServerUids =
getRange(trState, ver, lastLessOrEqual(ksKey), firstGreaterThan(ksKey), GetRangeLimits(1), Reverse::False);
RangeResult serverUids = wait(futureServerUids);
ASSERT(serverUids.size()); // every shard needs to have a team
std::vector<UID> src;
std::vector<UID> ignore; // 'ignore' is so named because it is the vector into which we decode the 'dest' servers in
// the case where this key is being relocated. But 'src' is the canonical location until
// the move is finished, because it could be cancelled at any time.
decodeKeyServersValue(serverTagResult, serverUids[0].value, src, ignore);
Optional<std::vector<StorageServerInterface>> serverInterfaces =
wait(transactionalGetServerInterfaces(trState, ver, src));
ASSERT(serverInterfaces.present()); // since this is happening transactionally, /FF/keyServers and /FF/serverList
// need to be consistent with one another
ssi = serverInterfaces.get();
Standalone<VectorRef<const char*>> addresses;
for (auto i : ssi) {
std::string ipString = trState->options.includePort ? i.address().toString() : i.address().ip.toString();
char* c_string = new (addresses.arena()) char[ipString.length() + 1];
strcpy(c_string, ipString.c_str());
addresses.push_back(addresses.arena(), c_string);
}
return addresses;
}
Future<Standalone<VectorRef<const char*>>> Transaction::getAddressesForKey(const Key& key) {
++trState->cx->transactionLogicalReads;
++trState->cx->transactionGetAddressesForKeyRequests;
auto ver = getReadVersion();
return getAddressesForKeyActor(trState, ver, key);
}
ACTOR Future<Key> getKeyAndConflictRange(Reference<TransactionState> trState,
KeySelector k,
Future<Version> version,
Promise<std::pair<Key, Key>> conflictRange) {
try {
Key rep = wait(getKey(trState, k, version));
if (k.offset <= 0)
conflictRange.send(std::make_pair(rep, k.orEqual ? keyAfter(k.getKey()) : Key(k.getKey(), k.arena())));
else
conflictRange.send(
std::make_pair(k.orEqual ? keyAfter(k.getKey()) : Key(k.getKey(), k.arena()), keyAfter(rep)));
return rep;
} catch (Error& e) {
conflictRange.send(std::make_pair(Key(), Key()));
throw;
}
}
Future<Key> Transaction::getKey(const KeySelector& key, Snapshot snapshot) {
++trState->cx->transactionLogicalReads;
++trState->cx->transactionGetKeyRequests;
if (snapshot)
return ::getKey(trState, key, getReadVersion());
Promise<std::pair<Key, Key>> conflictRange;
extraConflictRanges.push_back(conflictRange.getFuture());
return getKeyAndConflictRange(trState, key, getReadVersion(), conflictRange);
}
template <class GetKeyValuesFamilyRequest>
void increaseCounterForRequest(Database cx) {
if constexpr (std::is_same<GetKeyValuesFamilyRequest, GetKeyValuesRequest>::value) {
++cx->transactionGetRangeRequests;
} else if (std::is_same<GetKeyValuesFamilyRequest, GetKeyValuesAndFlatMapRequest>::value) {
++cx->transactionGetRangeAndFlatMapRequests;
} else {
UNREACHABLE();
}
}
template <class GetKeyValuesFamilyRequest, class GetKeyValuesFamilyReply>
Future<RangeResult> Transaction::getRangeInternal(const KeySelector& begin,
const KeySelector& end,
const Key& mapper,
GetRangeLimits limits,
Snapshot snapshot,
Reverse reverse) {
++trState->cx->transactionLogicalReads;
increaseCounterForRequest<GetKeyValuesFamilyRequest>(trState->cx);
if (limits.isReached())
return RangeResult();
if (!limits.isValid())
return range_limits_invalid();
ASSERT(limits.rows != 0);
KeySelector b = begin;
if (b.orEqual) {
TEST(true); // Native begin orEqual==true
b.removeOrEqual(b.arena());
}
KeySelector e = end;
if (e.orEqual) {
TEST(true); // Native end orEqual==true
e.removeOrEqual(e.arena());
}
if (b.offset >= e.offset && b.getKey() >= e.getKey()) {
TEST(true); // Native range inverted
return RangeResult();
}
Promise<std::pair<Key, Key>> conflictRange;
if (!snapshot) {
extraConflictRanges.push_back(conflictRange.getFuture());
}
return ::getRange<GetKeyValuesFamilyRequest, GetKeyValuesFamilyReply>(
trState, getReadVersion(), b, e, mapper, limits, conflictRange, snapshot, reverse);
}
Future<RangeResult> Transaction::getRange(const KeySelector& begin,
const KeySelector& end,
GetRangeLimits limits,
Snapshot snapshot,
Reverse reverse) {
return getRangeInternal<GetKeyValuesRequest, GetKeyValuesReply>(begin, end, ""_sr, limits, snapshot, reverse);
}
Future<RangeResult> Transaction::getRangeAndFlatMap(const KeySelector& begin,
const KeySelector& end,
const Key& mapper,
GetRangeLimits limits,
Snapshot snapshot,
Reverse reverse) {
return getRangeInternal<GetKeyValuesAndFlatMapRequest, GetKeyValuesAndFlatMapReply>(
begin, end, mapper, limits, snapshot, reverse);
}
Future<RangeResult> Transaction::getRange(const KeySelector& begin,
const KeySelector& end,
int limit,
Snapshot snapshot,
Reverse reverse) {
return getRange(begin, end, GetRangeLimits(limit), snapshot, reverse);
}
// A method for streaming data from the storage server that is more efficient than getRange when reading large amounts
// of data
Future<Void> Transaction::getRangeStream(const PromiseStream<RangeResult>& results,
const KeySelector& begin,
const KeySelector& end,
GetRangeLimits limits,
Snapshot snapshot,
Reverse reverse) {
++trState->cx->transactionLogicalReads;
++trState->cx->transactionGetRangeStreamRequests;
// FIXME: limits are not implemented yet, and this code has not be tested with reverse=true
ASSERT(!limits.hasByteLimit() && !limits.hasRowLimit() && !reverse);
KeySelector b = begin;
if (b.orEqual) {
TEST(true); // Native stream begin orEqual==true
b.removeOrEqual(b.arena());
}
KeySelector e = end;
if (e.orEqual) {
TEST(true); // Native stream end orEqual==true
e.removeOrEqual(e.arena());
}
if (b.offset >= e.offset && b.getKey() >= e.getKey()) {
TEST(true); // Native stream range inverted
results.sendError(end_of_stream());
return Void();
}
Promise<std::pair<Key, Key>> conflictRange;
if (!snapshot) {
extraConflictRanges.push_back(conflictRange.getFuture());
}
return forwardErrors(
::getRangeStream(trState, results, getReadVersion(), b, e, limits, conflictRange, snapshot, reverse), results);
}
Future<Void> Transaction::getRangeStream(const PromiseStream<RangeResult>& results,
const KeySelector& begin,
const KeySelector& end,
int limit,
Snapshot snapshot,
Reverse reverse) {
return getRangeStream(results, begin, end, GetRangeLimits(limit), snapshot, reverse);
}
void Transaction::addReadConflictRange(KeyRangeRef const& keys) {
ASSERT(!keys.empty());
// There aren't any keys in the database with size larger than KEY_SIZE_LIMIT, so if range contains large keys
// we can translate it to an equivalent one with smaller keys
KeyRef begin = keys.begin;
KeyRef end = keys.end;
if (begin.size() >
(begin.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
begin = begin.substr(
0,
(begin.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT) +
1);
if (end.size() >
(end.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
end = end.substr(
0,
(end.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT) +
1);
KeyRangeRef r = KeyRangeRef(begin, end);
if (r.empty()) {
return;
}
tr.transaction.read_conflict_ranges.push_back_deep(tr.arena, r);
}
void Transaction::makeSelfConflicting() {
BinaryWriter wr(Unversioned());
wr.serializeBytes(LiteralStringRef("\xFF/SC/"));
wr << deterministicRandom()->randomUniqueID();
auto r = singleKeyRange(wr.toValue(), tr.arena);
tr.transaction.read_conflict_ranges.push_back(tr.arena, r);
tr.transaction.write_conflict_ranges.push_back(tr.arena, r);
}
void Transaction::set(const KeyRef& key, const ValueRef& value, AddConflictRange addConflictRange) {
++trState->cx->transactionSetMutations;
if (key.size() >
(key.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
throw key_too_large();
if (value.size() > CLIENT_KNOBS->VALUE_SIZE_LIMIT)
throw value_too_large();
auto& req = tr;
auto& t = req.transaction;
auto r = singleKeyRange(key, req.arena);
auto v = ValueRef(req.arena, value);
t.mutations.emplace_back(req.arena, MutationRef::SetValue, r.begin, v);
if (addConflictRange) {
t.write_conflict_ranges.push_back(req.arena, r);
}
}
void Transaction::atomicOp(const KeyRef& key,
const ValueRef& operand,
MutationRef::Type operationType,
AddConflictRange addConflictRange) {
++trState->cx->transactionAtomicMutations;
if (key.size() >
(key.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
throw key_too_large();
if (operand.size() > CLIENT_KNOBS->VALUE_SIZE_LIMIT)
throw value_too_large();
if (apiVersionAtLeast(510)) {
if (operationType == MutationRef::Min)
operationType = MutationRef::MinV2;
else if (operationType == MutationRef::And)
operationType = MutationRef::AndV2;
}
auto& req = tr;
auto& t = req.transaction;
auto r = singleKeyRange(key, req.arena);
auto v = ValueRef(req.arena, operand);
t.mutations.emplace_back(req.arena, operationType, r.begin, v);
if (addConflictRange && operationType != MutationRef::SetVersionstampedKey)
t.write_conflict_ranges.push_back(req.arena, r);
TEST(true); // NativeAPI atomic operation
}
void Transaction::clear(const KeyRangeRef& range, AddConflictRange addConflictRange) {
++trState->cx->transactionClearMutations;
auto& req = tr;
auto& t = req.transaction;
KeyRef begin = range.begin;
KeyRef end = range.end;
// There aren't any keys in the database with size larger than KEY_SIZE_LIMIT, so if range contains large keys
// we can translate it to an equivalent one with smaller keys
if (begin.size() >
(begin.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
begin = begin.substr(
0,
(begin.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT) +
1);
if (end.size() >
(end.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
end = end.substr(
0,
(end.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT) +
1);
auto r = KeyRangeRef(req.arena, KeyRangeRef(begin, end));
if (r.empty())
return;
t.mutations.emplace_back(req.arena, MutationRef::ClearRange, r.begin, r.end);
if (addConflictRange)
t.write_conflict_ranges.push_back(req.arena, r);
}
void Transaction::clear(const KeyRef& key, AddConflictRange addConflictRange) {
++trState->cx->transactionClearMutations;
// There aren't any keys in the database with size larger than KEY_SIZE_LIMIT
if (key.size() >
(key.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
return;
auto& req = tr;
auto& t = req.transaction;
// efficient single key range clear range mutation, see singleKeyRange
uint8_t* data = new (req.arena) uint8_t[key.size() + 1];
memcpy(data, key.begin(), key.size());
data[key.size()] = 0;
t.mutations.emplace_back(
req.arena, MutationRef::ClearRange, KeyRef(data, key.size()), KeyRef(data, key.size() + 1));
if (addConflictRange)
t.write_conflict_ranges.emplace_back(req.arena, KeyRef(data, key.size()), KeyRef(data, key.size() + 1));
}
void Transaction::addWriteConflictRange(const KeyRangeRef& keys) {
ASSERT(!keys.empty());
auto& req = tr;
auto& t = req.transaction;
// There aren't any keys in the database with size larger than KEY_SIZE_LIMIT, so if range contains large keys
// we can translate it to an equivalent one with smaller keys
KeyRef begin = keys.begin;
KeyRef end = keys.end;
if (begin.size() >
(begin.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
begin = begin.substr(
0,
(begin.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT) +
1);
if (end.size() >
(end.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
end = end.substr(
0,
(end.startsWith(systemKeys.begin) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT) +
1);
KeyRangeRef r = KeyRangeRef(begin, end);
if (r.empty()) {
return;
}
t.write_conflict_ranges.push_back_deep(req.arena, r);
}
double Transaction::getBackoff(int errCode) {
double returnedBackoff = backoff;
if (errCode == error_code_tag_throttled) {
auto priorityItr = trState->cx->throttledTags.find(trState->options.priority);
for (auto& tag : trState->options.tags) {
if (priorityItr != trState->cx->throttledTags.end()) {
auto tagItr = priorityItr->second.find(tag);
if (tagItr != priorityItr->second.end()) {
TEST(true); // Returning throttle backoff
returnedBackoff = std::max(
returnedBackoff,
std::min(CLIENT_KNOBS->TAG_THROTTLE_RECHECK_INTERVAL, tagItr->second.throttleDuration()));
if (returnedBackoff == CLIENT_KNOBS->TAG_THROTTLE_RECHECK_INTERVAL) {
break;
}
}
}
}
}
returnedBackoff *= deterministicRandom()->random01();
// Set backoff for next time
if (errCode == error_code_proxy_memory_limit_exceeded) {
backoff = std::min(backoff * CLIENT_KNOBS->BACKOFF_GROWTH_RATE, CLIENT_KNOBS->RESOURCE_CONSTRAINED_MAX_BACKOFF);
} else {
backoff = std::min(backoff * CLIENT_KNOBS->BACKOFF_GROWTH_RATE, trState->options.maxBackoff);
}
return returnedBackoff;
}
TransactionOptions::TransactionOptions(Database const& cx) {
reset(cx);
if (BUGGIFY) {
commitOnFirstProxy = true;
}
}
void TransactionOptions::clear() {
maxBackoff = CLIENT_KNOBS->DEFAULT_MAX_BACKOFF;
getReadVersionFlags = 0;
sizeLimit = CLIENT_KNOBS->TRANSACTION_SIZE_LIMIT;
maxTransactionLoggingFieldLength = 0;
checkWritesEnabled = false;
causalWriteRisky = false;
commitOnFirstProxy = false;
debugDump = false;
lockAware = false;
readOnly = false;
firstInBatch = false;
includePort = false;
reportConflictingKeys = false;
tags = TagSet{};
readTags = TagSet{};
priority = TransactionPriority::DEFAULT;
expensiveClearCostEstimation = false;
}
TransactionOptions::TransactionOptions() {
clear();
}
void TransactionOptions::reset(Database const& cx) {
clear();
lockAware = cx->lockAware;
if (cx->apiVersionAtLeast(630)) {
includePort = true;
}
}
void Transaction::resetImpl(bool generateNewSpan) {
flushTrLogsIfEnabled();
trState = trState->cloneAndReset(createTrLogInfoProbabilistically(trState->cx), generateNewSpan);
tr = CommitTransactionRequest(trState->spanID);
readVersion = Future<Version>();
metadataVersion = Promise<Optional<Key>>();
extraConflictRanges.clear();
commitResult = Promise<Void>();
committing = Future<Void>();
cancelWatches();
}
void Transaction::reset() {
resetImpl(false);
}
void Transaction::fullReset() {
resetImpl(true);
span = Span(trState->spanID, "Transaction"_loc);
backoff = CLIENT_KNOBS->DEFAULT_BACKOFF;
}
int Transaction::apiVersionAtLeast(int minVersion) const {
return trState->cx->apiVersionAtLeast(minVersion);
}
class MutationBlock {
public:
bool mutated;
bool cleared;
ValueRef setValue;
MutationBlock() : mutated(false) {}
MutationBlock(bool _cleared) : mutated(true), cleared(_cleared) {}
MutationBlock(ValueRef value) : mutated(true), cleared(false), setValue(value) {}
};
bool compareBegin(KeyRangeRef lhs, KeyRangeRef rhs) {
return lhs.begin < rhs.begin;
}
// If there is any intersection between the two given sets of ranges, returns a range that
// falls within the intersection
Optional<KeyRangeRef> intersects(VectorRef<KeyRangeRef> lhs, VectorRef<KeyRangeRef> rhs) {
if (lhs.size() && rhs.size()) {
std::sort(lhs.begin(), lhs.end(), compareBegin);
std::sort(rhs.begin(), rhs.end(), compareBegin);
int l = 0, r = 0;
while (l < lhs.size() && r < rhs.size()) {
if (lhs[l].end <= rhs[r].begin)
l++;
else if (rhs[r].end <= lhs[l].begin)
r++;
else
return lhs[l] & rhs[r];
}
}
return Optional<KeyRangeRef>();
}
ACTOR void checkWrites(Reference<TransactionState> trState,
Future<Void> committed,
Promise<Void> outCommitted,
CommitTransactionRequest req) {
state Version version;
try {
wait(committed);
// If the commit is successful, by definition the transaction still exists for now. Grab the version, and don't
// use it again.
version = trState->committedVersion;
outCommitted.send(Void());
} catch (Error& e) {
outCommitted.sendError(e);
return;
}
wait(delay(deterministicRandom()->random01())); // delay between 0 and 1 seconds
// Future<Optional<Version>> version, Database cx, CommitTransactionRequest req ) {
state KeyRangeMap<MutationBlock> expectedValues;
auto& mutations = req.transaction.mutations;
state int mCount = mutations.size(); // debugging info for traceEvent
for (int idx = 0; idx < mutations.size(); idx++) {
if (mutations[idx].type == MutationRef::SetValue)
expectedValues.insert(singleKeyRange(mutations[idx].param1), MutationBlock(mutations[idx].param2));
else if (mutations[idx].type == MutationRef::ClearRange)
expectedValues.insert(KeyRangeRef(mutations[idx].param1, mutations[idx].param2), MutationBlock(true));
}
try {
state Transaction tr(trState->cx);
tr.setVersion(version);
state int checkedRanges = 0;
state KeyRangeMap<MutationBlock>::Ranges ranges = expectedValues.ranges();
state KeyRangeMap<MutationBlock>::iterator it = ranges.begin();
for (; it != ranges.end(); ++it) {
state MutationBlock m = it->value();
if (m.mutated) {
checkedRanges++;
if (m.cleared) {
RangeResult shouldBeEmpty = wait(tr.getRange(it->range(), 1));
if (shouldBeEmpty.size()) {
TraceEvent(SevError, "CheckWritesFailed")
.detail("Class", "Clear")
.detail("KeyBegin", it->range().begin)
.detail("KeyEnd", it->range().end);
return;
}
} else {
Optional<Value> val = wait(tr.get(it->range().begin));
if (!val.present() || val.get() != m.setValue) {
TraceEvent evt(SevError, "CheckWritesFailed");
evt.detail("Class", "Set").detail("Key", it->range().begin).detail("Expected", m.setValue);
if (!val.present())
evt.detail("Actual", "_Value Missing_");
else
evt.detail("Actual", val.get());
return;
}
}
}
}
TraceEvent("CheckWritesSuccess")
.detail("Version", version)
.detail("MutationCount", mCount)
.detail("CheckedRanges", checkedRanges);
} catch (Error& e) {
bool ok = e.code() == error_code_transaction_too_old || e.code() == error_code_future_version;
TraceEvent(ok ? SevWarn : SevError, "CheckWritesFailed").error(e);
throw;
}
}
ACTOR static Future<Void> commitDummyTransaction(Reference<TransactionState> trState, KeyRange range) {
state Transaction tr(trState->cx);
state int retries = 0;
state Span span("NAPI:dummyTransaction"_loc, trState->spanID);
tr.span.addParent(span.context);
loop {
try {
TraceEvent("CommitDummyTransaction").detail("Key", range.begin).detail("Retries", retries);
tr.trState->options = trState->options;
tr.trState->taskID = trState->taskID;
tr.setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr.setOption(FDBTransactionOptions::CAUSAL_WRITE_RISKY);
tr.setOption(FDBTransactionOptions::LOCK_AWARE);
tr.addReadConflictRange(range);
tr.addWriteConflictRange(range);
wait(tr.commit());
return Void();
} catch (Error& e) {
TraceEvent("CommitDummyTransactionError")
.error(e, true)
.detail("Key", range.begin)
.detail("Retries", retries);
wait(tr.onError(e));
}
++retries;
}
}
void Transaction::cancelWatches(Error const& e) {
for (int i = 0; i < watches.size(); ++i)
if (!watches[i]->onChangeTrigger.isSet())
watches[i]->onChangeTrigger.sendError(e);
watches.clear();
}
void Transaction::setupWatches() {
try {
Future<Version> watchVersion = getCommittedVersion() > 0 ? getCommittedVersion() : getReadVersion();
for (int i = 0; i < watches.size(); ++i)
watches[i]->setWatch(watchValueMap(watchVersion,
watches[i]->key,
watches[i]->value,
trState->cx,
trState->options.readTags,
trState->spanID,
trState->taskID,
trState->debugID,
trState->useProvisionalProxies));
watches.clear();
} catch (Error&) {
ASSERT(false); // The above code must NOT throw because commit has already occured.
throw internal_error();
}
}
ACTOR Future<Optional<ClientTrCommitCostEstimation>> estimateCommitCosts(Reference<TransactionState> trState,
CommitTransactionRef const* transaction) {
state ClientTrCommitCostEstimation trCommitCosts;
state KeyRangeRef keyRange;
state int i = 0;
for (; i < transaction->mutations.size(); ++i) {
auto* it = &transaction->mutations[i];
if (it->type == MutationRef::Type::SetValue || it->isAtomicOp()) {
trCommitCosts.opsCount++;
trCommitCosts.writeCosts += getWriteOperationCost(it->expectedSize());
} else if (it->type == MutationRef::Type::ClearRange) {
trCommitCosts.opsCount++;
keyRange = KeyRangeRef(it->param1, it->param2);
if (trState->options.expensiveClearCostEstimation) {
StorageMetrics m = wait(trState->cx->getStorageMetrics(keyRange, CLIENT_KNOBS->TOO_MANY));
trCommitCosts.clearIdxCosts.emplace_back(i, getWriteOperationCost(m.bytes));
trCommitCosts.writeCosts += getWriteOperationCost(m.bytes);
++trCommitCosts.expensiveCostEstCount;
++trState->cx->transactionsExpensiveClearCostEstCount;
} else {
std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations = wait(getKeyRangeLocations(
trState, keyRange, CLIENT_KNOBS->TOO_MANY, Reverse::False, &StorageServerInterface::getShardState));
if (locations.empty()) {
continue;
}
uint64_t bytes = 0;
if (locations.size() == 1) {
bytes = CLIENT_KNOBS->INCOMPLETE_SHARD_PLUS;
} else { // small clear on the boundary will hit two shards but be much smaller than the shard size
bytes = CLIENT_KNOBS->INCOMPLETE_SHARD_PLUS * 2 +
(locations.size() - 2) * (int64_t)trState->cx->smoothMidShardSize.smoothTotal();
}
trCommitCosts.clearIdxCosts.emplace_back(i, getWriteOperationCost(bytes));
trCommitCosts.writeCosts += getWriteOperationCost(bytes);
}
}
}
// sample on written bytes
if (!trState->cx->sampleOnCost(trCommitCosts.writeCosts))
return Optional<ClientTrCommitCostEstimation>();
// sample clear op: the expectation of #sampledOp is every COMMIT_SAMPLE_COST sample once
// we also scale the cost of mutations whose cost is less than COMMIT_SAMPLE_COST as scaledCost =
// min(COMMIT_SAMPLE_COST, cost) If we have 4 transactions: A - 100 1-cost mutations: E[sampled ops] = 1, E[sampled
// cost] = 100 B - 1 100-cost mutation: E[sampled ops] = 1, E[sampled cost] = 100 C - 50 2-cost mutations: E[sampled
// ops] = 1, E[sampled cost] = 100 D - 1 150-cost mutation and 150 1-cost mutations: E[sampled ops] = 3, E[sampled
// cost] = 150cost * 1 + 150 * 100cost * 0.01 = 300
ASSERT(trCommitCosts.writeCosts > 0);
std::deque<std::pair<int, uint64_t>> newClearIdxCosts;
for (const auto& [idx, cost] : trCommitCosts.clearIdxCosts) {
if (trCommitCosts.writeCosts >= CLIENT_KNOBS->COMMIT_SAMPLE_COST) {
double mul = trCommitCosts.writeCosts / std::max(1.0, (double)CLIENT_KNOBS->COMMIT_SAMPLE_COST);
if (deterministicRandom()->random01() < cost * mul / trCommitCosts.writeCosts) {
newClearIdxCosts.emplace_back(
idx, cost < CLIENT_KNOBS->COMMIT_SAMPLE_COST ? CLIENT_KNOBS->COMMIT_SAMPLE_COST : cost);
}
} else if (deterministicRandom()->random01() < (double)cost / trCommitCosts.writeCosts) {
newClearIdxCosts.emplace_back(
idx, cost < CLIENT_KNOBS->COMMIT_SAMPLE_COST ? CLIENT_KNOBS->COMMIT_SAMPLE_COST : cost);
}
}
trCommitCosts.clearIdxCosts.swap(newClearIdxCosts);
return trCommitCosts;
}
ACTOR static Future<Void> tryCommit(Reference<TransactionState> trState,
CommitTransactionRequest req,
Future<Version> readVersion) {
state TraceInterval interval("TransactionCommit");
state double startTime = now();
state Span span("NAPI:tryCommit"_loc, trState->spanID);
state Optional<UID> debugID = trState->debugID;
if (debugID.present()) {
TraceEvent(interval.begin()).detail("Parent", debugID.get());
}
try {
if (CLIENT_BUGGIFY) {
throw deterministicRandom()->randomChoice(std::vector<Error>{
not_committed(), transaction_too_old(), proxy_memory_limit_exceeded(), commit_unknown_result() });
}
if (req.tagSet.present() && trState->options.priority < TransactionPriority::IMMEDIATE) {
wait(store(req.transaction.read_snapshot, readVersion) &&
store(req.commitCostEstimation, estimateCommitCosts(trState, &req.transaction)));
} else {
wait(store(req.transaction.read_snapshot, readVersion));
}
startTime = now();
state Optional<UID> commitID = Optional<UID>();
if (debugID.present()) {
commitID = nondeterministicRandom()->randomUniqueID();
g_traceBatch.addAttach("CommitAttachID", debugID.get().first(), commitID.get().first());
g_traceBatch.addEvent("CommitDebug", commitID.get().first(), "NativeAPI.commit.Before");
}
req.debugID = commitID;
state Future<CommitID> reply;
if (trState->options.commitOnFirstProxy) {
if (trState->cx->clientInfo->get().firstCommitProxy.present()) {
reply = throwErrorOr(brokenPromiseToMaybeDelivered(
trState->cx->clientInfo->get().firstCommitProxy.get().commit.tryGetReply(req)));
} else {
const std::vector<CommitProxyInterface>& proxies = trState->cx->clientInfo->get().commitProxies;
reply = proxies.size() ? throwErrorOr(brokenPromiseToMaybeDelivered(proxies[0].commit.tryGetReply(req)))
: Never();
}
} else {
reply = basicLoadBalance(trState->cx->getCommitProxies(trState->useProvisionalProxies),
&CommitProxyInterface::commit,
req,
TaskPriority::DefaultPromiseEndpoint,
AtMostOnce::True);
}
choose {
when(wait(trState->cx->onProxiesChanged())) {
reply.cancel();
throw request_maybe_delivered();
}
when(CommitID ci = wait(reply)) {
Version v = ci.version;
if (v != invalidVersion) {
if (CLIENT_BUGGIFY) {
throw commit_unknown_result();
}
if (debugID.present())
TraceEvent(interval.end()).detail("CommittedVersion", v);
trState->committedVersion = v;
if (v > trState->cx->metadataVersionCache[trState->cx->mvCacheInsertLocation].first) {
trState->cx->mvCacheInsertLocation =
(trState->cx->mvCacheInsertLocation + 1) % trState->cx->metadataVersionCache.size();
trState->cx->metadataVersionCache[trState->cx->mvCacheInsertLocation] =
std::make_pair(v, ci.metadataVersion);
}
Standalone<StringRef> ret = makeString(10);
placeVersionstamp(mutateString(ret), v, ci.txnBatchId);
trState->versionstampPromise.send(ret);
trState->numErrors = 0;
++trState->cx->transactionsCommitCompleted;
trState->cx->transactionCommittedMutations += req.transaction.mutations.size();
trState->cx->transactionCommittedMutationBytes += req.transaction.mutations.expectedSize();
if (commitID.present())
g_traceBatch.addEvent("CommitDebug", commitID.get().first(), "NativeAPI.commit.After");
double latency = now() - startTime;
trState->cx->commitLatencies.addSample(latency);
trState->cx->latencies.addSample(now() - trState->startTime);
if (trState->trLogInfo)
trState->trLogInfo->addLog(
FdbClientLogEvents::EventCommit_V2(startTime,
trState->cx->clientLocality.dcId(),
latency,
req.transaction.mutations.size(),
req.transaction.mutations.expectedSize(),
ci.version,
req));
return Void();
} else {
// clear the RYW transaction which contains previous conflicting keys
trState->conflictingKeys.reset();
if (ci.conflictingKRIndices.present()) {
trState->conflictingKeys =
std::make_shared<CoalescedKeyRangeMap<Value>>(conflictingKeysFalse, specialKeys.end);
state Standalone<VectorRef<int>> conflictingKRIndices = ci.conflictingKRIndices.get();
// drop duplicate indices and merge overlapped ranges
// Note: addReadConflictRange in native transaction object does not merge overlapped ranges
state std::unordered_set<int> mergedIds(conflictingKRIndices.begin(),
conflictingKRIndices.end());
for (auto const& rCRIndex : mergedIds) {
const KeyRangeRef kr = req.transaction.read_conflict_ranges[rCRIndex];
const KeyRange krWithPrefix = KeyRangeRef(kr.begin.withPrefix(conflictingKeysRange.begin),
kr.end.withPrefix(conflictingKeysRange.begin));
trState->conflictingKeys->insert(krWithPrefix, conflictingKeysTrue);
}
}
if (debugID.present())
TraceEvent(interval.end()).detail("Conflict", 1);
if (commitID.present())
g_traceBatch.addEvent("CommitDebug", commitID.get().first(), "NativeAPI.commit.After");
throw not_committed();
}
}
}
} catch (Error& e) {
if (e.code() == error_code_request_maybe_delivered || e.code() == error_code_commit_unknown_result) {
// We don't know if the commit happened, and it might even still be in flight.
if (!trState->options.causalWriteRisky) {
// Make sure it's not still in flight, either by ensuring the master we submitted to is dead, or the
// version we submitted with is dead, or by committing a conflicting transaction successfully
// if ( cx->getCommitProxies()->masterGeneration <= originalMasterGeneration )
// To ensure the original request is not in flight, we need a key range which intersects its read
// conflict ranges We pick a key range which also intersects its write conflict ranges, since that
// avoids potentially creating conflicts where there otherwise would be none We make the range as small
// as possible (a single key range) to minimize conflicts The intersection will never be empty, because
// if it were (since !causalWriteRisky) makeSelfConflicting would have been applied automatically to req
KeyRangeRef selfConflictingRange =
intersects(req.transaction.write_conflict_ranges, req.transaction.read_conflict_ranges).get();
TEST(true); // Waiting for dummy transaction to report commit_unknown_result
wait(commitDummyTransaction(trState, singleKeyRange(selfConflictingRange.begin)));
}
// The user needs to be informed that we aren't sure whether the commit happened. Standard retry loops
// retry it anyway (relying on transaction idempotence) but a client might do something else.
throw commit_unknown_result();
} else {
if (e.code() != error_code_transaction_too_old && e.code() != error_code_not_committed &&
e.code() != error_code_database_locked && e.code() != error_code_proxy_memory_limit_exceeded &&
e.code() != error_code_batch_transaction_throttled && e.code() != error_code_tag_throttled) {
TraceEvent(SevError, "TryCommitError").error(e);
}
if (trState->trLogInfo)
trState->trLogInfo->addLog(FdbClientLogEvents::EventCommitError(
startTime, trState->cx->clientLocality.dcId(), static_cast<int>(e.code()), req));
throw;
}
}
}
Future<Void> Transaction::commitMutations() {
try {
// if this is a read-only transaction return immediately
if (!tr.transaction.write_conflict_ranges.size() && !tr.transaction.mutations.size()) {
trState->numErrors = 0;
trState->committedVersion = invalidVersion;
trState->versionstampPromise.sendError(no_commit_version());
return Void();
}
++trState->cx->transactionsCommitStarted;
if (trState->options.readOnly)
return transaction_read_only();
trState->cx->mutationsPerCommit.addSample(tr.transaction.mutations.size());
trState->cx->bytesPerCommit.addSample(tr.transaction.mutations.expectedSize());
if (trState->options.tags.size())
tr.tagSet = trState->options.tags;
size_t transactionSize = getSize();
if (transactionSize > (uint64_t)FLOW_KNOBS->PACKET_WARNING) {
TraceEvent(!g_network->isSimulated() ? SevWarnAlways : SevWarn, "LargeTransaction")
.suppressFor(1.0)
.detail("Size", transactionSize)
.detail("NumMutations", tr.transaction.mutations.size())
.detail("ReadConflictSize", tr.transaction.read_conflict_ranges.expectedSize())
.detail("WriteConflictSize", tr.transaction.write_conflict_ranges.expectedSize())
.detail("DebugIdentifier", trState->trLogInfo ? trState->trLogInfo->identifier : "");
}
if (!apiVersionAtLeast(300)) {
transactionSize =
tr.transaction.mutations.expectedSize(); // Old API versions didn't account for conflict ranges when
// determining whether to throw transaction_too_large
}
if (transactionSize > trState->options.sizeLimit) {
return transaction_too_large();
}
if (!readVersion.isValid())
getReadVersion(
GetReadVersionRequest::FLAG_CAUSAL_READ_RISKY); // sets up readVersion field. We had no reads, so no
// need for (expensive) full causal consistency.
bool isCheckingWrites = trState->options.checkWritesEnabled && deterministicRandom()->random01() < 0.01;
for (int i = 0; i < extraConflictRanges.size(); i++)
if (extraConflictRanges[i].isReady() &&
extraConflictRanges[i].get().first < extraConflictRanges[i].get().second)
tr.transaction.read_conflict_ranges.emplace_back(
tr.arena, extraConflictRanges[i].get().first, extraConflictRanges[i].get().second);
if (!trState->options.causalWriteRisky &&
!intersects(tr.transaction.write_conflict_ranges, tr.transaction.read_conflict_ranges).present())
makeSelfConflicting();
if (isCheckingWrites) {
// add all writes into the read conflict range...
tr.transaction.read_conflict_ranges.append(
tr.arena, tr.transaction.write_conflict_ranges.begin(), tr.transaction.write_conflict_ranges.size());
}
if (trState->options.debugDump) {
UID u = nondeterministicRandom()->randomUniqueID();
TraceEvent("TransactionDump", u).log();
for (auto i = tr.transaction.mutations.begin(); i != tr.transaction.mutations.end(); ++i)
TraceEvent("TransactionMutation", u)
.detail("T", i->type)
.detail("P1", i->param1)
.detail("P2", i->param2);
}
if (trState->options.lockAware) {
tr.flags = tr.flags | CommitTransactionRequest::FLAG_IS_LOCK_AWARE;
}
if (trState->options.firstInBatch) {
tr.flags = tr.flags | CommitTransactionRequest::FLAG_FIRST_IN_BATCH;
}
if (trState->options.reportConflictingKeys) {
tr.transaction.report_conflicting_keys = true;
}
Future<Void> commitResult = tryCommit(trState, tr, readVersion);
if (isCheckingWrites) {
Promise<Void> committed;
checkWrites(trState, commitResult, committed, tr);
return committed.getFuture();
}
return commitResult;
} catch (Error& e) {
TraceEvent("ClientCommitError").error(e);
return Future<Void>(e);
} catch (...) {
Error e(error_code_unknown_error);
TraceEvent("ClientCommitError").error(e);
return Future<Void>(e);
}
}
ACTOR Future<Void> commitAndWatch(Transaction* self) {
try {
wait(self->commitMutations());
self->getDatabase()->transactionTracingSample =
(self->getCommittedVersion() % 60000000) < (60000000 * FLOW_KNOBS->TRACING_SAMPLE_RATE);
if (!self->watches.empty()) {
self->setupWatches();
}
if (!self->apiVersionAtLeast(700)) {
self->reset();
}
return Void();
} catch (Error& e) {
if (e.code() != error_code_actor_cancelled) {
if (!self->watches.empty()) {
self->cancelWatches(e);
}
self->trState->versionstampPromise.sendError(transaction_invalid_version());
if (!self->apiVersionAtLeast(700)) {
self->reset();
}
}
throw;
}
}
Future<Void> Transaction::commit() {
ASSERT(!committing.isValid());
committing = commitAndWatch(this);
return committing;
}
void Transaction::setOption(FDBTransactionOptions::Option option, Optional<StringRef> value) {
switch (option) {
case FDBTransactionOptions::INITIALIZE_NEW_DATABASE:
validateOptionValueNotPresent(value);
if (readVersion.isValid())
throw read_version_already_set();
readVersion = Version(0);
trState->options.causalWriteRisky = true;
break;
case FDBTransactionOptions::CAUSAL_READ_RISKY:
validateOptionValueNotPresent(value);
trState->options.getReadVersionFlags |= GetReadVersionRequest::FLAG_CAUSAL_READ_RISKY;
break;
case FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE:
validateOptionValueNotPresent(value);
trState->options.priority = TransactionPriority::IMMEDIATE;
break;
case FDBTransactionOptions::PRIORITY_BATCH:
validateOptionValueNotPresent(value);
trState->options.priority = TransactionPriority::BATCH;
break;
case FDBTransactionOptions::CAUSAL_WRITE_RISKY:
validateOptionValueNotPresent(value);
trState->options.causalWriteRisky = true;
break;
case FDBTransactionOptions::COMMIT_ON_FIRST_PROXY:
validateOptionValueNotPresent(value);
trState->options.commitOnFirstProxy = true;
break;
case FDBTransactionOptions::CHECK_WRITES_ENABLE:
validateOptionValueNotPresent(value);
trState->options.checkWritesEnabled = true;
break;
case FDBTransactionOptions::DEBUG_DUMP:
validateOptionValueNotPresent(value);
trState->options.debugDump = true;
break;
case FDBTransactionOptions::TRANSACTION_LOGGING_ENABLE:
setOption(FDBTransactionOptions::DEBUG_TRANSACTION_IDENTIFIER, value);
setOption(FDBTransactionOptions::LOG_TRANSACTION);
break;
case FDBTransactionOptions::DEBUG_TRANSACTION_IDENTIFIER:
validateOptionValuePresent(value);
if (value.get().size() > 100 || value.get().size() == 0) {
throw invalid_option_value();
}
if (trState->trLogInfo) {
if (trState->trLogInfo->identifier.empty()) {
trState->trLogInfo->identifier = value.get().printable();
} else if (trState->trLogInfo->identifier != value.get().printable()) {
TraceEvent(SevWarn, "CannotChangeDebugTransactionIdentifier")
.detail("PreviousIdentifier", trState->trLogInfo->identifier)
.detail("NewIdentifier", value.get());
throw client_invalid_operation();
}
} else {
trState->trLogInfo =
makeReference<TransactionLogInfo>(value.get().printable(), TransactionLogInfo::DONT_LOG);
trState->trLogInfo->maxFieldLength = trState->options.maxTransactionLoggingFieldLength;
}
if (trState->debugID.present()) {
TraceEvent(SevInfo, "TransactionBeingTraced")
.detail("DebugTransactionID", trState->trLogInfo->identifier)
.detail("ServerTraceID", trState->debugID.get());
}
break;
case FDBTransactionOptions::LOG_TRANSACTION:
validateOptionValueNotPresent(value);
if (trState->trLogInfo && !trState->trLogInfo->identifier.empty()) {
trState->trLogInfo->logTo(TransactionLogInfo::TRACE_LOG);
} else {
TraceEvent(SevWarn, "DebugTransactionIdentifierNotSet")
.detail("Error", "Debug Transaction Identifier option must be set before logging the transaction");
throw client_invalid_operation();
}
break;
case FDBTransactionOptions::TRANSACTION_LOGGING_MAX_FIELD_LENGTH:
validateOptionValuePresent(value);
{
int maxFieldLength = extractIntOption(value, -1, std::numeric_limits<int32_t>::max());
if (maxFieldLength == 0) {
throw invalid_option_value();
}
trState->options.maxTransactionLoggingFieldLength = maxFieldLength;
}
if (trState->trLogInfo) {
trState->trLogInfo->maxFieldLength = trState->options.maxTransactionLoggingFieldLength;
}
break;
case FDBTransactionOptions::SERVER_REQUEST_TRACING:
validateOptionValueNotPresent(value);
debugTransaction(deterministicRandom()->randomUniqueID());
if (trState->trLogInfo && !trState->trLogInfo->identifier.empty()) {
TraceEvent(SevInfo, "TransactionBeingTraced")
.detail("DebugTransactionID", trState->trLogInfo->identifier)
.detail("ServerTraceID", trState->debugID.get());
}
break;
case FDBTransactionOptions::MAX_RETRY_DELAY:
validateOptionValuePresent(value);
trState->options.maxBackoff = extractIntOption(value, 0, std::numeric_limits<int32_t>::max()) / 1000.0;
break;
case FDBTransactionOptions::SIZE_LIMIT:
validateOptionValuePresent(value);
trState->options.sizeLimit = extractIntOption(value, 32, CLIENT_KNOBS->TRANSACTION_SIZE_LIMIT);
break;
case FDBTransactionOptions::LOCK_AWARE:
validateOptionValueNotPresent(value);
trState->options.lockAware = true;
trState->options.readOnly = false;
break;
case FDBTransactionOptions::READ_LOCK_AWARE:
validateOptionValueNotPresent(value);
if (!trState->options.lockAware) {
trState->options.lockAware = true;
trState->options.readOnly = true;
}
break;
case FDBTransactionOptions::FIRST_IN_BATCH:
validateOptionValueNotPresent(value);
trState->options.firstInBatch = true;
break;
case FDBTransactionOptions::USE_PROVISIONAL_PROXIES:
validateOptionValueNotPresent(value);
trState->options.getReadVersionFlags |= GetReadVersionRequest::FLAG_USE_PROVISIONAL_PROXIES;
trState->useProvisionalProxies = UseProvisionalProxies::True;
break;
case FDBTransactionOptions::INCLUDE_PORT_IN_ADDRESS:
validateOptionValueNotPresent(value);
trState->options.includePort = true;
break;
case FDBTransactionOptions::TAG:
validateOptionValuePresent(value);
trState->options.tags.addTag(value.get());
break;
case FDBTransactionOptions::AUTO_THROTTLE_TAG:
validateOptionValuePresent(value);
trState->options.tags.addTag(value.get());
trState->options.readTags.addTag(value.get());
break;
case FDBTransactionOptions::SPAN_PARENT:
validateOptionValuePresent(value);
if (value.get().size() != 16) {
throw invalid_option_value();
}
span.addParent(BinaryReader::fromStringRef<UID>(value.get(), Unversioned()));
break;
case FDBTransactionOptions::REPORT_CONFLICTING_KEYS:
validateOptionValueNotPresent(value);
trState->options.reportConflictingKeys = true;
break;
case FDBTransactionOptions::EXPENSIVE_CLEAR_COST_ESTIMATION_ENABLE:
validateOptionValueNotPresent(value);
trState->options.expensiveClearCostEstimation = true;
break;
default:
break;
}
}
ACTOR Future<GetReadVersionReply> getConsistentReadVersion(SpanID parentSpan,
DatabaseContext* cx,
uint32_t transactionCount,
TransactionPriority priority,
uint32_t flags,
TransactionTagMap<uint32_t> tags,
Optional<UID> debugID) {
state Span span("NAPI:getConsistentReadVersion"_loc, parentSpan);
++cx->transactionReadVersionBatches;
if (debugID.present())
g_traceBatch.addEvent("TransactionDebug", debugID.get().first(), "NativeAPI.getConsistentReadVersion.Before");
loop {
try {
state GetReadVersionRequest req(span.context, transactionCount, priority, flags, tags, debugID);
choose {
when(wait(cx->onProxiesChanged())) {}
when(GetReadVersionReply v =
wait(basicLoadBalance(cx->getGrvProxies(UseProvisionalProxies(
flags & GetReadVersionRequest::FLAG_USE_PROVISIONAL_PROXIES)),
&GrvProxyInterface::getConsistentReadVersion,
req,
cx->taskID))) {
if (tags.size() != 0) {
auto& priorityThrottledTags = cx->throttledTags[priority];
for (auto& tag : tags) {
auto itr = v.tagThrottleInfo.find(tag.first);
if (itr == v.tagThrottleInfo.end()) {
TEST(true); // Removing client throttle
priorityThrottledTags.erase(tag.first);
} else {
TEST(true); // Setting client throttle
auto result = priorityThrottledTags.try_emplace(tag.first, itr->second);
if (!result.second) {
result.first->second.update(itr->second);
}
}
}
}
if (debugID.present())
g_traceBatch.addEvent(
"TransactionDebug", debugID.get().first(), "NativeAPI.getConsistentReadVersion.After");
ASSERT(v.version > 0);
cx->minAcceptableReadVersion = std::min(cx->minAcceptableReadVersion, v.version);
return v;
}
}
} catch (Error& e) {
if (e.code() != error_code_broken_promise && e.code() != error_code_batch_transaction_throttled)
TraceEvent(SevError, "GetConsistentReadVersionError").error(e);
if (e.code() == error_code_batch_transaction_throttled && !cx->apiVersionAtLeast(630)) {
wait(delayJittered(5.0));
} else {
throw;
}
}
}
}
ACTOR Future<Void> readVersionBatcher(DatabaseContext* cx,
FutureStream<DatabaseContext::VersionRequest> versionStream,
TransactionPriority priority,
uint32_t flags) {
state std::vector<Promise<GetReadVersionReply>> requests;
state PromiseStream<Future<Void>> addActor;
state Future<Void> collection = actorCollection(addActor.getFuture());
state Future<Void> timeout;
state Optional<UID> debugID;
state bool send_batch;
state Reference<Histogram> batchSizeDist = Histogram::getHistogram(LiteralStringRef("GrvBatcher"),
LiteralStringRef("ClientGrvBatchSize"),
Histogram::Unit::countLinear,
0,
CLIENT_KNOBS->MAX_BATCH_SIZE * 2);
state Reference<Histogram> batchIntervalDist =
Histogram::getHistogram(LiteralStringRef("GrvBatcher"),
LiteralStringRef("ClientGrvBatchInterval"),
Histogram::Unit::microseconds,
0,
CLIENT_KNOBS->GRV_BATCH_TIMEOUT * 1000000 * 2);
state Reference<Histogram> grvReplyLatencyDist = Histogram::getHistogram(
LiteralStringRef("GrvBatcher"), LiteralStringRef("ClientGrvReplyLatency"), Histogram::Unit::microseconds);
state double lastRequestTime = now();
state TransactionTagMap<uint32_t> tags;
// dynamic batching
state PromiseStream<double> replyTimes;
state PromiseStream<Error> _errorStream;
state double batchTime = 0;
state Span span("NAPI:readVersionBatcher"_loc);
loop {
send_batch = false;
choose {
when(DatabaseContext::VersionRequest req = waitNext(versionStream)) {
if (req.debugID.present()) {
if (!debugID.present()) {
debugID = nondeterministicRandom()->randomUniqueID();
}
g_traceBatch.addAttach("TransactionAttachID", req.debugID.get().first(), debugID.get().first());
}
span.addParent(req.spanContext);
requests.push_back(req.reply);
for (auto tag : req.tags) {
++tags[tag];
}
if (requests.size() == CLIENT_KNOBS->MAX_BATCH_SIZE) {
send_batch = true;
++cx->transactionGrvFullBatches;
} else if (!timeout.isValid()) {
timeout = delay(batchTime, TaskPriority::GetConsistentReadVersion);
}
}
when(wait(timeout.isValid() ? timeout : Never())) {
send_batch = true;
++cx->transactionGrvTimedOutBatches;
}
// dynamic batching monitors reply latencies
when(double reply_latency = waitNext(replyTimes.getFuture())) {
double target_latency = reply_latency * 0.5;
batchTime = std::min(0.1 * target_latency + 0.9 * batchTime, CLIENT_KNOBS->GRV_BATCH_TIMEOUT);
grvReplyLatencyDist->sampleSeconds(reply_latency);
}
when(wait(collection)) {} // for errors
}
if (send_batch) {
int count = requests.size();
ASSERT(count);
batchSizeDist->sampleRecordCounter(count);
auto requestTime = now();
batchIntervalDist->sampleSeconds(requestTime - lastRequestTime);
lastRequestTime = requestTime;
// dynamic batching
Promise<GetReadVersionReply> GRVReply;
requests.push_back(GRVReply);
addActor.send(ready(timeReply(GRVReply.getFuture(), replyTimes)));
Future<Void> batch = incrementalBroadcastWithError(
getConsistentReadVersion(span.context, cx, count, priority, flags, std::move(tags), std::move(debugID)),
std::move(requests),
CLIENT_KNOBS->BROADCAST_BATCH_SIZE);
span = Span("NAPI:readVersionBatcher"_loc);
tags.clear();
debugID = Optional<UID>();
requests.clear();
addActor.send(batch);
timeout = Future<Void>();
}
}
}
ACTOR Future<Version> extractReadVersion(Reference<TransactionState> trState,
Location location,
SpanID spanContext,
Future<GetReadVersionReply> f,
Promise<Optional<Value>> metadataVersion) {
state Span span(spanContext, location, { trState->spanID });
GetReadVersionReply rep = wait(f);
double latency = now() - trState->startTime;
trState->cx->GRVLatencies.addSample(latency);
if (trState->trLogInfo)
trState->trLogInfo->addLog(FdbClientLogEvents::EventGetVersion_V3(
trState->startTime, trState->cx->clientLocality.dcId(), latency, trState->options.priority, rep.version));
if (rep.locked && !trState->options.lockAware)
throw database_locked();
++trState->cx->transactionReadVersionsCompleted;
switch (trState->options.priority) {
case TransactionPriority::IMMEDIATE:
++trState->cx->transactionImmediateReadVersionsCompleted;
break;
case TransactionPriority::DEFAULT:
++trState->cx->transactionDefaultReadVersionsCompleted;
break;
case TransactionPriority::BATCH:
++trState->cx->transactionBatchReadVersionsCompleted;
break;
default:
ASSERT(false);
}
if (trState->options.tags.size() != 0) {
auto& priorityThrottledTags = trState->cx->throttledTags[trState->options.priority];
for (auto& tag : trState->options.tags) {
auto itr = priorityThrottledTags.find(tag);
if (itr != priorityThrottledTags.end()) {
if (itr->second.expired()) {
priorityThrottledTags.erase(itr);
} else if (itr->second.throttleDuration() > 0) {
TEST(true); // throttling transaction after getting read version
++trState->cx->transactionReadVersionsThrottled;
throw tag_throttled();
}
}
}
for (auto& tag : trState->options.tags) {
auto itr = priorityThrottledTags.find(tag);
if (itr != priorityThrottledTags.end()) {
itr->second.addReleased(1);
}
}
}
if (rep.version > trState->cx->metadataVersionCache[trState->cx->mvCacheInsertLocation].first) {
trState->cx->mvCacheInsertLocation =
(trState->cx->mvCacheInsertLocation + 1) % trState->cx->metadataVersionCache.size();
trState->cx->metadataVersionCache[trState->cx->mvCacheInsertLocation] =
std::make_pair(rep.version, rep.metadataVersion);
}
metadataVersion.send(rep.metadataVersion);
return rep.version;
}
Future<Version> Transaction::getReadVersion(uint32_t flags) {
if (!readVersion.isValid()) {
++trState->cx->transactionReadVersions;
flags |= trState->options.getReadVersionFlags;
switch (trState->options.priority) {
case TransactionPriority::IMMEDIATE:
flags |= GetReadVersionRequest::PRIORITY_SYSTEM_IMMEDIATE;
++trState->cx->transactionImmediateReadVersions;
break;
case TransactionPriority::DEFAULT:
flags |= GetReadVersionRequest::PRIORITY_DEFAULT;
++trState->cx->transactionDefaultReadVersions;
break;
case TransactionPriority::BATCH:
flags |= GetReadVersionRequest::PRIORITY_BATCH;
++trState->cx->transactionBatchReadVersions;
break;
default:
ASSERT(false);
}
if (trState->options.tags.size() != 0) {
double maxThrottleDelay = 0.0;
bool canRecheck = false;
auto& priorityThrottledTags = trState->cx->throttledTags[trState->options.priority];
for (auto& tag : trState->options.tags) {
auto itr = priorityThrottledTags.find(tag);
if (itr != priorityThrottledTags.end()) {
if (!itr->second.expired()) {
maxThrottleDelay = std::max(maxThrottleDelay, itr->second.throttleDuration());
canRecheck = itr->second.canRecheck();
} else {
priorityThrottledTags.erase(itr);
}
}
}
if (maxThrottleDelay > 0.0 && !canRecheck) { // TODO: allow delaying?
TEST(true); // Throttling tag before GRV request
++trState->cx->transactionReadVersionsThrottled;
readVersion = tag_throttled();
return readVersion;
} else {
TEST(maxThrottleDelay > 0.0); // Rechecking throttle
}
for (auto& tag : trState->options.tags) {
auto itr = priorityThrottledTags.find(tag);
if (itr != priorityThrottledTags.end()) {
itr->second.updateChecked();
}
}
}
auto& batcher = trState->cx->versionBatcher[flags];
if (!batcher.actor.isValid()) {
batcher.actor =
readVersionBatcher(trState->cx.getPtr(), batcher.stream.getFuture(), trState->options.priority, flags);
}
Location location = "NAPI:getReadVersion"_loc;
UID spanContext = generateSpanID(trState->cx->transactionTracingSample, trState->spanID);
auto const req = DatabaseContext::VersionRequest(spanContext, trState->options.tags, trState->debugID);
batcher.stream.send(req);
trState->startTime = now();
readVersion = extractReadVersion(trState, location, spanContext, req.reply.getFuture(), metadataVersion);
}
return readVersion;
}
Optional<Version> Transaction::getCachedReadVersion() const {
if (readVersion.isValid() && readVersion.isReady() && !readVersion.isError()) {
return readVersion.get();
} else {
return Optional<Version>();
}
}
Future<Standalone<StringRef>> Transaction::getVersionstamp() {
if (committing.isValid()) {
return transaction_invalid_version();
}
return trState->versionstampPromise.getFuture();
}
// Gets the protocol version reported by a coordinator via the protocol info interface
ACTOR Future<ProtocolVersion> getCoordinatorProtocol(NetworkAddressList coordinatorAddresses) {
RequestStream<ProtocolInfoRequest> requestStream{ Endpoint::wellKnown({ coordinatorAddresses },
WLTOKEN_PROTOCOL_INFO) };
ProtocolInfoReply reply = wait(retryBrokenPromise(requestStream, ProtocolInfoRequest{}));
return reply.version;
}
// Gets the protocol version reported by a coordinator in its connect packet
// If we are unable to get a version from the connect packet (e.g. because we lost connection with the peer), then this
// function will return with an unset result.
// If an expected version is given, this future won't return if the actual protocol version matches the expected version
ACTOR Future<Optional<ProtocolVersion>> getCoordinatorProtocolFromConnectPacket(
NetworkAddress coordinatorAddress,
Optional<ProtocolVersion> expectedVersion) {
state Reference<AsyncVar<Optional<ProtocolVersion>> const> protocolVersion =
FlowTransport::transport().getPeerProtocolAsyncVar(coordinatorAddress);
loop {
if (protocolVersion->get().present() && protocolVersion->get() != expectedVersion) {
return protocolVersion->get();
}
Future<Void> change = protocolVersion->onChange();
if (!protocolVersion->get().present()) {
// If we still don't have any connection info after a timeout, retry sending the protocol version request
change = timeout(change, FLOW_KNOBS->CONNECTION_MONITOR_TIMEOUT, Void());
}
wait(change);
if (!protocolVersion->get().present()) {
return protocolVersion->get();
}
}
}
// Returns the protocol version reported by the given coordinator
// If an expected version is given, the future won't return until the protocol version is different than expected
ACTOR Future<ProtocolVersion> getClusterProtocolImpl(
Reference<AsyncVar<Optional<ClientLeaderRegInterface>> const> coordinator,
Optional<ProtocolVersion> expectedVersion) {
state bool needToConnect = true;
state Future<ProtocolVersion> protocolVersion = Never();
loop {
if (!coordinator->get().present()) {
wait(coordinator->onChange());
} else {
Endpoint coordinatorEndpoint = coordinator->get().get().getLeader.getEndpoint();
if (needToConnect) {
// Even though we typically rely on the connect packet to get the protocol version, we need to send some
// request in order to start a connection. This protocol version request serves that purpose.
protocolVersion = getCoordinatorProtocol(coordinatorEndpoint.addresses);
needToConnect = false;
}
choose {
when(wait(coordinator->onChange())) { needToConnect = true; }
when(ProtocolVersion pv = wait(protocolVersion)) {
if (!expectedVersion.present() || expectedVersion.get() != pv) {
return pv;
}
protocolVersion = Never();
}
// Older versions of FDB don't have an endpoint to return the protocol version, so we get this info from
// the connect packet
when(Optional<ProtocolVersion> pv = wait(getCoordinatorProtocolFromConnectPacket(
coordinatorEndpoint.getPrimaryAddress(), expectedVersion))) {
if (pv.present()) {
return pv.get();
} else {
needToConnect = true;
}
}
}
}
}
}
// Returns the protocol version reported by the coordinator this client is currently connected to
// If an expected version is given, the future won't return until the protocol version is different than expected
// Note: this will never return if the server is running a protocol from FDB 5.0 or older
Future<ProtocolVersion> DatabaseContext::getClusterProtocol(Optional<ProtocolVersion> expectedVersion) {
return getClusterProtocolImpl(coordinator, expectedVersion);
}
uint32_t Transaction::getSize() {
auto s = tr.transaction.mutations.expectedSize() + tr.transaction.read_conflict_ranges.expectedSize() +
tr.transaction.write_conflict_ranges.expectedSize();
return s;
}
Future<Void> Transaction::onError(Error const& e) {
if (e.code() == error_code_success) {
return client_invalid_operation();
}
if (e.code() == error_code_not_committed || e.code() == error_code_commit_unknown_result ||
e.code() == error_code_database_locked || e.code() == error_code_proxy_memory_limit_exceeded ||
e.code() == error_code_process_behind || e.code() == error_code_batch_transaction_throttled ||
e.code() == error_code_tag_throttled) {
if (e.code() == error_code_not_committed)
++trState->cx->transactionsNotCommitted;
else if (e.code() == error_code_commit_unknown_result)
++trState->cx->transactionsMaybeCommitted;
else if (e.code() == error_code_proxy_memory_limit_exceeded)
++trState->cx->transactionsResourceConstrained;
else if (e.code() == error_code_process_behind)
++trState->cx->transactionsProcessBehind;
else if (e.code() == error_code_batch_transaction_throttled || e.code() == error_code_tag_throttled) {
++trState->cx->transactionsThrottled;
}
double backoff = getBackoff(e.code());
reset();
return delay(backoff, trState->taskID);
}
if (e.code() == error_code_transaction_too_old || e.code() == error_code_future_version) {
if (e.code() == error_code_transaction_too_old)
++trState->cx->transactionsTooOld;
else if (e.code() == error_code_future_version)
++trState->cx->transactionsFutureVersions;
double maxBackoff = trState->options.maxBackoff;
reset();
return delay(std::min(CLIENT_KNOBS->FUTURE_VERSION_RETRY_DELAY, maxBackoff), trState->taskID);
}
if (g_network->isSimulated() && ++trState->numErrors % 10 == 0)
TraceEvent(SevWarnAlways, "TransactionTooManyRetries").detail("NumRetries", trState->numErrors);
return e;
}
ACTOR Future<StorageMetrics> getStorageMetricsLargeKeyRange(Database cx, KeyRange keys);
ACTOR Future<StorageMetrics> doGetStorageMetrics(Database cx, KeyRange keys, Reference<LocationInfo> locationInfo) {
loop {
try {
WaitMetricsRequest req(keys, StorageMetrics(), StorageMetrics());
req.min.bytes = 0;
req.max.bytes = -1;
StorageMetrics m = wait(loadBalance(
locationInfo->locations(), &StorageServerInterface::waitMetrics, req, TaskPriority::DataDistribution));
return m;
} catch (Error& e) {
if (e.code() != error_code_wrong_shard_server && e.code() != error_code_all_alternatives_failed) {
TraceEvent(SevError, "WaitStorageMetricsError").error(e);
throw;
}
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, TaskPriority::DataDistribution));
cx->invalidateCache(keys);
StorageMetrics m = wait(getStorageMetricsLargeKeyRange(cx, keys));
return m;
}
}
}
ACTOR Future<StorageMetrics> getStorageMetricsLargeKeyRange(Database cx, KeyRange keys) {
state Span span("NAPI:GetStorageMetricsLargeKeyRange"_loc);
std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(cx,
keys,
std::numeric_limits<int>::max(),
Reverse::False,
&StorageServerInterface::waitMetrics,
span.context,
Optional<UID>(),
UseProvisionalProxies::False));
state int nLocs = locations.size();
state std::vector<Future<StorageMetrics>> fx(nLocs);
state StorageMetrics total;
KeyRef partBegin, partEnd;
for (int i = 0; i < nLocs; i++) {
partBegin = (i == 0) ? keys.begin : locations[i].first.begin;
partEnd = (i == nLocs - 1) ? keys.end : locations[i].first.end;
fx[i] = doGetStorageMetrics(cx, KeyRangeRef(partBegin, partEnd), locations[i].second);
}
wait(waitForAll(fx));
for (int i = 0; i < nLocs; i++) {
total += fx[i].get();
}
return total;
}
ACTOR Future<Void> trackBoundedStorageMetrics(KeyRange keys,
Reference<LocationInfo> location,
StorageMetrics x,
StorageMetrics halfError,
PromiseStream<StorageMetrics> deltaStream) {
try {
loop {
WaitMetricsRequest req(keys, x - halfError, x + halfError);
StorageMetrics nextX = wait(loadBalance(location->locations(), &StorageServerInterface::waitMetrics, req));
deltaStream.send(nextX - x);
x = nextX;
}
} catch (Error& e) {
deltaStream.sendError(e);
throw e;
}
}
ACTOR Future<StorageMetrics> waitStorageMetricsMultipleLocations(
std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations,
StorageMetrics min,
StorageMetrics max,
StorageMetrics permittedError) {
state int nLocs = locations.size();
state std::vector<Future<StorageMetrics>> fx(nLocs);
state StorageMetrics total;
state PromiseStream<StorageMetrics> deltas;
state std::vector<Future<Void>> wx(fx.size());
state StorageMetrics halfErrorPerMachine = permittedError * (0.5 / nLocs);
state StorageMetrics maxPlus = max + halfErrorPerMachine * (nLocs - 1);
state StorageMetrics minMinus = min - halfErrorPerMachine * (nLocs - 1);
for (int i = 0; i < nLocs; i++) {
WaitMetricsRequest req(locations[i].first, StorageMetrics(), StorageMetrics());
req.min.bytes = 0;
req.max.bytes = -1;
fx[i] = loadBalance(locations[i].second->locations(),
&StorageServerInterface::waitMetrics,
req,
TaskPriority::DataDistribution);
}
wait(waitForAll(fx));
// invariant: true total is between (total-permittedError/2, total+permittedError/2)
for (int i = 0; i < nLocs; i++)
total += fx[i].get();
if (!total.allLessOrEqual(maxPlus))
return total;
if (!minMinus.allLessOrEqual(total))
return total;
for (int i = 0; i < nLocs; i++)
wx[i] = trackBoundedStorageMetrics(
locations[i].first, locations[i].second, fx[i].get(), halfErrorPerMachine, deltas);
loop {
StorageMetrics delta = waitNext(deltas.getFuture());
total += delta;
if (!total.allLessOrEqual(maxPlus))
return total;
if (!minMinus.allLessOrEqual(total))
return total;
}
}
ACTOR Future<StorageMetrics> extractMetrics(Future<std::pair<Optional<StorageMetrics>, int>> fMetrics) {
std::pair<Optional<StorageMetrics>, int> x = wait(fMetrics);
return x.first.get();
}
ACTOR Future<Standalone<VectorRef<ReadHotRangeWithMetrics>>> getReadHotRanges(Database cx, KeyRange keys) {
state Span span("NAPI:GetReadHotRanges"_loc);
loop {
int64_t shardLimit = 100; // Shard limit here does not really matter since this function is currently only used
// to find the read-hot sub ranges within a read-hot shard.
std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(cx,
keys,
shardLimit,
Reverse::False,
&StorageServerInterface::getReadHotRanges,
span.context,
Optional<UID>(),
UseProvisionalProxies::False));
try {
// TODO: how to handle this?
// This function is called whenever a shard becomes read-hot. But somehow the shard was splitted across more
// than one storage server after become read-hot and before this function is called, i.e. a race condition.
// Should we abort and wait the newly splitted shards to be hot again?
state int nLocs = locations.size();
// if (nLocs > 1) {
// TraceEvent("RHDDebug")
// .detail("NumSSIs", nLocs)
// .detail("KeysBegin", keys.begin.printable().c_str())
// .detail("KeysEnd", keys.end.printable().c_str());
// }
state std::vector<Future<ReadHotSubRangeReply>> fReplies(nLocs);
KeyRef partBegin, partEnd;
for (int i = 0; i < nLocs; i++) {
partBegin = (i == 0) ? keys.begin : locations[i].first.begin;
partEnd = (i == nLocs - 1) ? keys.end : locations[i].first.end;
ReadHotSubRangeRequest req(KeyRangeRef(partBegin, partEnd));
fReplies[i] = loadBalance(locations[i].second->locations(),
&StorageServerInterface::getReadHotRanges,
req,
TaskPriority::DataDistribution);
}
wait(waitForAll(fReplies));
if (nLocs == 1) {
TEST(true); // Single-shard read hot range request
return fReplies[0].get().readHotRanges;
} else {
TEST(true); // Multi-shard read hot range request
Standalone<VectorRef<ReadHotRangeWithMetrics>> results;
for (int i = 0; i < nLocs; i++) {
results.append(results.arena(),
fReplies[i].get().readHotRanges.begin(),
fReplies[i].get().readHotRanges.size());
results.arena().dependsOn(fReplies[i].get().readHotRanges.arena());
}
return results;
}
} catch (Error& e) {
if (e.code() != error_code_wrong_shard_server && e.code() != error_code_all_alternatives_failed) {
TraceEvent(SevError, "GetReadHotSubRangesError").error(e);
throw;
}
cx->invalidateCache(keys);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, TaskPriority::DataDistribution));
}
}
}
ACTOR Future<std::pair<Optional<StorageMetrics>, int>> waitStorageMetrics(Database cx,
KeyRange keys,
StorageMetrics min,
StorageMetrics max,
StorageMetrics permittedError,
int shardLimit,
int expectedShardCount) {
state Span span("NAPI:WaitStorageMetrics"_loc, generateSpanID(cx->transactionTracingSample));
loop {
std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(cx,
keys,
shardLimit,
Reverse::False,
&StorageServerInterface::waitMetrics,
span.context,
Optional<UID>(),
UseProvisionalProxies::False));
if (expectedShardCount >= 0 && locations.size() != expectedShardCount) {
return std::make_pair(Optional<StorageMetrics>(), locations.size());
}
// SOMEDAY: Right now, if there are too many shards we delay and check again later. There may be a better
// solution to this.
if (locations.size() < shardLimit) {
try {
Future<StorageMetrics> fx;
if (locations.size() > 1) {
fx = waitStorageMetricsMultipleLocations(locations, min, max, permittedError);
} else {
WaitMetricsRequest req(keys, min, max);
fx = loadBalance(locations[0].second->locations(),
&StorageServerInterface::waitMetrics,
req,
TaskPriority::DataDistribution);
}
StorageMetrics x = wait(fx);
return std::make_pair(x, -1);
} catch (Error& e) {
if (e.code() != error_code_wrong_shard_server && e.code() != error_code_all_alternatives_failed) {
TraceEvent(SevError, "WaitStorageMetricsError").error(e);
throw;
}
cx->invalidateCache(keys);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, TaskPriority::DataDistribution));
}
} else {
TraceEvent(SevWarn, "WaitStorageMetricsPenalty")
.detail("Keys", keys)
.detail("Limit", CLIENT_KNOBS->STORAGE_METRICS_SHARD_LIMIT)
.detail("JitteredSecondsOfPenitence", CLIENT_KNOBS->STORAGE_METRICS_TOO_MANY_SHARDS_DELAY);
wait(delayJittered(CLIENT_KNOBS->STORAGE_METRICS_TOO_MANY_SHARDS_DELAY, TaskPriority::DataDistribution));
// make sure that the next getKeyRangeLocations() call will actually re-fetch the range
cx->invalidateCache(keys);
}
}
}
Future<std::pair<Optional<StorageMetrics>, int>> DatabaseContext::waitStorageMetrics(
KeyRange const& keys,
StorageMetrics const& min,
StorageMetrics const& max,
StorageMetrics const& permittedError,
int shardLimit,
int expectedShardCount) {
return ::waitStorageMetrics(Database(Reference<DatabaseContext>::addRef(this)),
keys,
min,
max,
permittedError,
shardLimit,
expectedShardCount);
}
Future<StorageMetrics> DatabaseContext::getStorageMetrics(KeyRange const& keys, int shardLimit) {
if (shardLimit > 0) {
StorageMetrics m;
m.bytes = -1;
return extractMetrics(::waitStorageMetrics(Database(Reference<DatabaseContext>::addRef(this)),
keys,
StorageMetrics(),
m,
StorageMetrics(),
shardLimit,
-1));
} else {
return ::getStorageMetricsLargeKeyRange(Database(Reference<DatabaseContext>::addRef(this)), keys);
}
}
ACTOR Future<Standalone<VectorRef<DDMetricsRef>>> waitDataDistributionMetricsList(Database cx,
KeyRange keys,
int shardLimit) {
loop {
choose {
when(wait(cx->onProxiesChanged())) {}
when(ErrorOr<GetDDMetricsReply> rep =
wait(errorOr(basicLoadBalance(cx->getCommitProxies(UseProvisionalProxies::False),
&CommitProxyInterface::getDDMetrics,
GetDDMetricsRequest(keys, shardLimit))))) {
if (rep.isError()) {
throw rep.getError();
}
return rep.get().storageMetricsList;
}
}
}
}
Future<Standalone<VectorRef<ReadHotRangeWithMetrics>>> DatabaseContext::getReadHotRanges(KeyRange const& keys) {
return ::getReadHotRanges(Database(Reference<DatabaseContext>::addRef(this)), keys);
}
ACTOR Future<Standalone<VectorRef<KeyRef>>> getRangeSplitPoints(Reference<TransactionState> trState,
KeyRange keys,
int64_t chunkSize) {
state Span span("NAPI:GetRangeSplitPoints"_loc, trState->spanID);
loop {
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations = wait(getKeyRangeLocations(
trState, keys, CLIENT_KNOBS->TOO_MANY, Reverse::False, &StorageServerInterface::getRangeSplitPoints));
try {
state int nLocs = locations.size();
state std::vector<Future<SplitRangeReply>> fReplies(nLocs);
KeyRef partBegin, partEnd;
for (int i = 0; i < nLocs; i++) {
partBegin = (i == 0) ? keys.begin : locations[i].first.begin;
partEnd = (i == nLocs - 1) ? keys.end : locations[i].first.end;
SplitRangeRequest req(KeyRangeRef(partBegin, partEnd), chunkSize);
fReplies[i] = loadBalance(locations[i].second->locations(),
&StorageServerInterface::getRangeSplitPoints,
req,
TaskPriority::DataDistribution);
}
wait(waitForAll(fReplies));
Standalone<VectorRef<KeyRef>> results;
results.push_back_deep(results.arena(), keys.begin);
for (int i = 0; i < nLocs; i++) {
if (i > 0) {
results.push_back_deep(results.arena(), locations[i].first.begin); // Need this shard boundary
}
if (fReplies[i].get().splitPoints.size() > 0) {
results.append(
results.arena(), fReplies[i].get().splitPoints.begin(), fReplies[i].get().splitPoints.size());
results.arena().dependsOn(fReplies[i].get().splitPoints.arena());
}
}
if (results.back() != keys.end) {
results.push_back_deep(results.arena(), keys.end);
}
return results;
} catch (Error& e) {
if (e.code() != error_code_wrong_shard_server && e.code() != error_code_all_alternatives_failed) {
TraceEvent(SevError, "GetRangeSplitPoints").error(e);
throw;
}
trState->cx->invalidateCache(keys);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, TaskPriority::DataDistribution));
}
}
}
Future<Standalone<VectorRef<KeyRef>>> Transaction::getRangeSplitPoints(KeyRange const& keys, int64_t chunkSize) {
return ::getRangeSplitPoints(trState, keys, chunkSize);
}
#define BG_REQUEST_DEBUG false
// the blob granule requests are a bit funky because they piggyback off the existing transaction to read from the system
// keyspace
ACTOR Future<Standalone<VectorRef<KeyRangeRef>>> getBlobGranuleRangesActor(Transaction* self, KeyRange keyRange) {
// FIXME: use streaming range read
state KeyRange currentRange = keyRange;
state Standalone<VectorRef<KeyRangeRef>> results;
if (BG_REQUEST_DEBUG) {
fmt::print("Getting Blob Granules for [{0} - {1})\n", keyRange.begin.printable(), keyRange.end.printable());
}
self->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
loop {
state RangeResult blobGranuleMapping = wait(
krmGetRanges(self, blobGranuleMappingKeys.begin, currentRange, 1000, GetRangeLimits::BYTE_LIMIT_UNLIMITED));
for (int i = 0; i < blobGranuleMapping.size() - 1; i++) {
if (blobGranuleMapping[i].value.size()) {
results.push_back(results.arena(),
KeyRangeRef(blobGranuleMapping[i].key, blobGranuleMapping[i + 1].key));
}
}
results.arena().dependsOn(blobGranuleMapping.arena());
if (blobGranuleMapping.more) {
currentRange = KeyRangeRef(blobGranuleMapping.back().key, currentRange.end);
} else {
return results;
}
}
}
Future<Standalone<VectorRef<KeyRangeRef>>> Transaction::getBlobGranuleRanges(const KeyRange& range) {
return ::getBlobGranuleRangesActor(this, range);
}
// hack (for now) to get blob worker interface into load balance
struct BWLocationInfo : MultiInterface<ReferencedInterface<BlobWorkerInterface>> {
using Locations = MultiInterface<ReferencedInterface<BlobWorkerInterface>>;
explicit BWLocationInfo(const std::vector<Reference<ReferencedInterface<BlobWorkerInterface>>>& v) : Locations(v) {}
};
ACTOR Future<Standalone<VectorRef<BlobGranuleChunkRef>>> readBlobGranulesActor(
Transaction* self,
KeyRange range,
Version begin,
Optional<Version> read,
Version* readVersionOut) { // read not present is "use transaction version"
state RangeResult blobGranuleMapping;
state Key granuleStartKey;
state Key granuleEndKey;
state KeyRange keyRange = range;
state UID workerId;
state int i;
state Version rv;
state Standalone<VectorRef<BlobGranuleChunkRef>> results;
if (read.present()) {
rv = read.get();
} else {
Version _end = wait(self->getReadVersion());
rv = _end;
}
self->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
// Right now just read whole blob range assignments from DB
// FIXME: eventually we probably want to cache this and invalidate similarly to storage servers.
// Cache misses could still read from the DB, or we could add it to the Transaction State Store and
// have proxies serve it from memory.
RangeResult _bgMapping =
wait(krmGetRanges(self, blobGranuleMappingKeys.begin, keyRange, 1000, GetRangeLimits::BYTE_LIMIT_UNLIMITED));
blobGranuleMapping = _bgMapping;
if (blobGranuleMapping.more) {
if (BG_REQUEST_DEBUG) {
fmt::print(
"BG Mapping for [{0} - %{1}) too large!\n", keyRange.begin.printable(), keyRange.end.printable());
}
throw unsupported_operation();
}
ASSERT(!blobGranuleMapping.more && blobGranuleMapping.size() < CLIENT_KNOBS->TOO_MANY);
if (blobGranuleMapping.size() == 0) {
if (BG_REQUEST_DEBUG) {
printf("no blob worker assignments yet\n");
}
throw blob_granule_transaction_too_old();
}
if (BG_REQUEST_DEBUG) {
fmt::print("Doing blob granule request @ {}\n", rv);
fmt::print("blob worker assignments:\n");
}
for (i = 0; i < blobGranuleMapping.size() - 1; i++) {
granuleStartKey = blobGranuleMapping[i].key;
granuleEndKey = blobGranuleMapping[i + 1].key;
if (!blobGranuleMapping[i].value.size()) {
if (BG_REQUEST_DEBUG) {
fmt::print("Key range [{0} - {1}) missing worker assignment!\n",
granuleStartKey.printable(),
granuleEndKey.printable());
// TODO probably new exception type instead
}
throw blob_granule_transaction_too_old();
}
workerId = decodeBlobGranuleMappingValue(blobGranuleMapping[i].value);
if (workerId == UID()) {
if (BG_REQUEST_DEBUG) {
fmt::print("Key range [{0} - {1}) has no assigned worker yet!\n",
granuleStartKey.printable(),
granuleEndKey.printable());
}
throw blob_granule_transaction_too_old();
}
if (BG_REQUEST_DEBUG) {
fmt::print(
" [{0} - {1}): {2}\n", granuleStartKey.printable(), granuleEndKey.printable(), workerId.toString());
}
if (!self->trState->cx->blobWorker_interf.count(workerId)) {
Optional<Value> workerInterface = wait(self->get(blobWorkerListKeyFor(workerId)));
// from the time the mapping was read from the db, the associated blob worker
// could have died and so its interface wouldn't be present as part of the blobWorkerList
// we persist in the db. So throw wrong_shard_server to get the new mapping
if (!workerInterface.present()) {
// need to re-read mapping, throw transaction_too_old so client retries. TODO better error?
// throw wrong_shard_server();
throw transaction_too_old();
}
// FIXME: maybe just want to insert here if there are racing queries for the same worker or something?
self->trState->cx->blobWorker_interf[workerId] = decodeBlobWorkerListValue(workerInterface.get());
if (BG_REQUEST_DEBUG) {
fmt::print(" decoded worker interface for {0}\n", workerId.toString());
}
}
}
// Make request for each granule
for (i = 0; i < blobGranuleMapping.size() - 1; i++) {
granuleStartKey = blobGranuleMapping[i].key;
granuleEndKey = blobGranuleMapping[i + 1].key;
// if this was a time travel and the request returned larger bounds, skip this chunk
if (granuleEndKey <= keyRange.begin) {
continue;
}
workerId = decodeBlobGranuleMappingValue(blobGranuleMapping[i].value);
// prune first/last granules to requested range
if (keyRange.begin > granuleStartKey) {
granuleStartKey = keyRange.begin;
}
if (keyRange.end < granuleEndKey) {
granuleEndKey = keyRange.end;
}
state BlobGranuleFileRequest req;
req.keyRange = KeyRangeRef(StringRef(req.arena, granuleStartKey), StringRef(req.arena, granuleEndKey));
req.beginVersion = begin;
req.readVersion = rv;
std::vector<Reference<ReferencedInterface<BlobWorkerInterface>>> v;
v.push_back(
makeReference<ReferencedInterface<BlobWorkerInterface>>(self->trState->cx->blobWorker_interf[workerId]));
state Reference<MultiInterface<ReferencedInterface<BlobWorkerInterface>>> location =
makeReference<BWLocationInfo>(v);
// use load balance with one option for now for retry and error handling
try {
choose {
when(BlobGranuleFileReply rep = wait(loadBalance(location,
&BlobWorkerInterface::blobGranuleFileRequest,
req,
TaskPriority::DefaultPromiseEndpoint,
AtMostOnce::False,
nullptr))) {
if (BG_REQUEST_DEBUG) {
fmt::print("Blob granule request for [{0} - {1}) @ {2} - {3} got reply from {4}:\n",
granuleStartKey.printable(),
granuleEndKey.printable(),
begin,
rv,
workerId.toString());
}
results.arena().dependsOn(rep.arena);
for (auto& chunk : rep.chunks) {
if (BG_REQUEST_DEBUG) {
fmt::print(
"[{0} - {1})\n", chunk.keyRange.begin.printable(), chunk.keyRange.end.printable());
fmt::print(" SnapshotFile: {0}\n \n DeltaFiles:\n",
chunk.snapshotFile.present() ? chunk.snapshotFile.get().toString().c_str()
: "<none>");
for (auto& df : chunk.deltaFiles) {
fmt::print(" {0}\n", df.toString());
}
fmt::print(" Deltas: ({0})", chunk.newDeltas.size());
if (chunk.newDeltas.size() > 0) {
fmt::print(" with version [{0} - {1}]",
chunk.newDeltas[0].version,
chunk.newDeltas[chunk.newDeltas.size() - 1].version);
}
fmt::print(" IncludedVersion: {0}\n\n\n", chunk.includedVersion);
}
results.push_back(results.arena(), chunk);
keyRange = KeyRangeRef(std::min(chunk.keyRange.end, keyRange.end), keyRange.end);
}
}
// if we detect that this blob worker fails, cancel the request, as otherwise load balance will
// retry indefinitely with one option
when(wait(IFailureMonitor::failureMonitor().onStateEqual(
location->get(0, &BlobWorkerInterface::blobGranuleFileRequest).getEndpoint(),
FailureStatus(true)))) {
if (BG_REQUEST_DEBUG) {
fmt::print("readBlobGranules got BW {0} failed\n", workerId.toString());
}
throw connection_failed();
}
}
} catch (Error& e) {
if (BG_REQUEST_DEBUG) {
fmt::print("BGReq got error {}\n", e.name());
}
// worker is up but didn't actually have granule, or connection failed
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_connection_failed) {
// need to re-read mapping, throw transaction_too_old so client retries. TODO better error?
throw transaction_too_old();
}
throw e;
}
}
if (readVersionOut != nullptr) {
*readVersionOut = rv;
}
return results;
}
Future<Standalone<VectorRef<BlobGranuleChunkRef>>> Transaction::readBlobGranules(const KeyRange& range,
Version begin,
Optional<Version> readVersion,
Version* readVersionOut) {
return readBlobGranulesActor(this, range, begin, readVersion, readVersionOut);
}
ACTOR Future<Void> setPerpetualStorageWiggle(Database cx, bool enable, LockAware lockAware) {
state ReadYourWritesTransaction tr(cx);
loop {
try {
tr.setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
if (lockAware) {
tr.setOption(FDBTransactionOptions::LOCK_AWARE);
}
tr.set(perpetualStorageWiggleKey, enable ? "1"_sr : "0"_sr);
wait(tr.commit());
break;
} catch (Error& e) {
wait(tr.onError(e));
}
}
return Void();
}
ACTOR Future<Void> splitStorageMetricsStream(PromiseStream<Key> resultStream,
Database cx,
KeyRange keys,
StorageMetrics limit,
StorageMetrics estimated) {
state Span span("NAPI:SplitStorageMetricsStream"_loc);
state Key beginKey = keys.begin;
state Key globalLastKey = beginKey;
resultStream.send(beginKey);
// track used across loops
state StorageMetrics globalUsed;
loop {
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(cx,
KeyRangeRef(beginKey, keys.end),
CLIENT_KNOBS->STORAGE_METRICS_SHARD_LIMIT,
Reverse::False,
&StorageServerInterface::splitMetrics,
span.context,
Optional<UID>(),
UseProvisionalProxies::False));
try {
//TraceEvent("SplitStorageMetrics").detail("Locations", locations.size());
state StorageMetrics localUsed = globalUsed;
state Key localLastKey = globalLastKey;
state Standalone<VectorRef<KeyRef>> results;
state int i = 0;
for (; i < locations.size(); i++) {
SplitMetricsRequest req(locations[i].first,
limit,
localUsed,
estimated,
i == locations.size() - 1 && keys.end <= locations.back().first.end);
SplitMetricsReply res = wait(loadBalance(locations[i].second->locations(),
&StorageServerInterface::splitMetrics,
req,
TaskPriority::DataDistribution));
if (res.splits.size() &&
res.splits[0] <= localLastKey) { // split points are out of order, possibly because
// of moving data, throw error to retry
ASSERT_WE_THINK(false); // FIXME: This seems impossible and doesn't seem to be covered by testing
throw all_alternatives_failed();
}
if (res.splits.size()) {
results.append(results.arena(), res.splits.begin(), res.splits.size());
results.arena().dependsOn(res.splits.arena());
localLastKey = res.splits.back();
}
localUsed = res.used;
//TraceEvent("SplitStorageMetricsResult").detail("Used", used.bytes).detail("Location", i).detail("Size", res.splits.size());
}
globalUsed = localUsed;
// only truncate split at end
if (keys.end <= locations.back().first.end &&
globalUsed.allLessOrEqual(limit * CLIENT_KNOBS->STORAGE_METRICS_UNFAIR_SPLIT_LIMIT) &&
results.size() > 1) {
results.resize(results.arena(), results.size() - 1);
localLastKey = results.back();
}
globalLastKey = localLastKey;
for (auto& splitKey : results) {
resultStream.send(splitKey);
}
if (keys.end <= locations.back().first.end) {
resultStream.send(keys.end);
resultStream.sendError(end_of_stream());
break;
} else {
beginKey = locations.back().first.end;
}
} catch (Error& e) {
if (e.code() == error_code_operation_cancelled) {
throw e;
}
if (e.code() != error_code_wrong_shard_server && e.code() != error_code_all_alternatives_failed) {
TraceEvent(SevError, "SplitStorageMetricsStreamError").error(e);
resultStream.sendError(e);
throw;
}
cx->invalidateCache(keys);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, TaskPriority::DataDistribution));
}
}
return Void();
}
Future<Void> DatabaseContext::splitStorageMetricsStream(const PromiseStream<Key>& resultStream,
KeyRange const& keys,
StorageMetrics const& limit,
StorageMetrics const& estimated) {
return ::splitStorageMetricsStream(
resultStream, Database(Reference<DatabaseContext>::addRef(this)), keys, limit, estimated);
}
ACTOR Future<Standalone<VectorRef<KeyRef>>> splitStorageMetrics(Database cx,
KeyRange keys,
StorageMetrics limit,
StorageMetrics estimated) {
state Span span("NAPI:SplitStorageMetrics"_loc);
loop {
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(cx,
keys,
CLIENT_KNOBS->STORAGE_METRICS_SHARD_LIMIT,
Reverse::False,
&StorageServerInterface::splitMetrics,
span.context,
Optional<UID>(),
UseProvisionalProxies::False));
state StorageMetrics used;
state Standalone<VectorRef<KeyRef>> results;
// SOMEDAY: Right now, if there are too many shards we delay and check again later. There may be a better
// solution to this.
if (locations.size() == CLIENT_KNOBS->STORAGE_METRICS_SHARD_LIMIT) {
wait(delay(CLIENT_KNOBS->STORAGE_METRICS_TOO_MANY_SHARDS_DELAY, TaskPriority::DataDistribution));
cx->invalidateCache(keys);
} else {
results.push_back_deep(results.arena(), keys.begin);
try {
//TraceEvent("SplitStorageMetrics").detail("Locations", locations.size());
state int i = 0;
for (; i < locations.size(); i++) {
SplitMetricsRequest req(locations[i].first, limit, used, estimated, i == locations.size() - 1);
SplitMetricsReply res = wait(loadBalance(locations[i].second->locations(),
&StorageServerInterface::splitMetrics,
req,
TaskPriority::DataDistribution));
if (res.splits.size() &&
res.splits[0] <= results.back()) { // split points are out of order, possibly because of
// moving data, throw error to retry
ASSERT_WE_THINK(
false); // FIXME: This seems impossible and doesn't seem to be covered by testing
throw all_alternatives_failed();
}
if (res.splits.size()) {
results.append(results.arena(), res.splits.begin(), res.splits.size());
results.arena().dependsOn(res.splits.arena());
}
used = res.used;
//TraceEvent("SplitStorageMetricsResult").detail("Used", used.bytes).detail("Location", i).detail("Size", res.splits.size());
}
if (used.allLessOrEqual(limit * CLIENT_KNOBS->STORAGE_METRICS_UNFAIR_SPLIT_LIMIT) &&
results.size() > 1) {
results.resize(results.arena(), results.size() - 1);
}
if (keys.end <= locations.back().first.end) {
results.push_back_deep(results.arena(), keys.end);
}
return results;
} catch (Error& e) {
if (e.code() != error_code_wrong_shard_server && e.code() != error_code_all_alternatives_failed) {
TraceEvent(SevError, "SplitStorageMetricsError").error(e);
throw;
}
cx->invalidateCache(keys);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY, TaskPriority::DataDistribution));
}
}
}
}
Future<Standalone<VectorRef<KeyRef>>> DatabaseContext::splitStorageMetrics(KeyRange const& keys,
StorageMetrics const& limit,
StorageMetrics const& estimated) {
return ::splitStorageMetrics(Database(Reference<DatabaseContext>::addRef(this)), keys, limit, estimated);
}
void Transaction::checkDeferredError() const {
trState->cx->checkDeferredError();
}
Reference<TransactionLogInfo> Transaction::createTrLogInfoProbabilistically(const Database& cx) {
if (!cx->isError()) {
double clientSamplingProbability = GlobalConfig::globalConfig().get<double>(
fdbClientInfoTxnSampleRate, CLIENT_KNOBS->CSI_SAMPLING_PROBABILITY);
if (((networkOptions.logClientInfo.present() && networkOptions.logClientInfo.get()) || BUGGIFY) &&
deterministicRandom()->random01() < clientSamplingProbability &&
(!g_network->isSimulated() || !g_simulator.speedUpSimulation)) {
return makeReference<TransactionLogInfo>(TransactionLogInfo::DATABASE);
}
}
return Reference<TransactionLogInfo>();
}
void Transaction::setTransactionID(uint64_t id) {
ASSERT(getSize() == 0);
trState->spanID = SpanID(id, trState->spanID.second());
}
void Transaction::setToken(uint64_t token) {
ASSERT(getSize() == 0);
trState->spanID = SpanID(trState->spanID.first(), token);
}
void enableClientInfoLogging() {
ASSERT(networkOptions.logClientInfo.present() == false);
networkOptions.logClientInfo = true;
TraceEvent(SevInfo, "ClientInfoLoggingEnabled").log();
}
ACTOR Future<Void> snapCreate(Database cx, Standalone<StringRef> snapCmd, UID snapUID) {
TraceEvent("SnapCreateEnter").detail("SnapCmd", snapCmd).detail("UID", snapUID);
try {
loop {
choose {
when(wait(cx->onProxiesChanged())) {}
when(wait(basicLoadBalance(cx->getCommitProxies(UseProvisionalProxies::False),
&CommitProxyInterface::proxySnapReq,
ProxySnapRequest(snapCmd, snapUID, snapUID),
cx->taskID,
AtMostOnce::True))) {
TraceEvent("SnapCreateExit").detail("SnapCmd", snapCmd).detail("UID", snapUID);
return Void();
}
}
}
} catch (Error& e) {
TraceEvent("SnapCreateError").detail("SnapCmd", snapCmd.toString()).detail("UID", snapUID).error(e);
throw;
}
}
ACTOR Future<bool> checkSafeExclusions(Database cx, std::vector<AddressExclusion> exclusions) {
TraceEvent("ExclusionSafetyCheckBegin")
.detail("NumExclusion", exclusions.size())
.detail("Exclusions", describe(exclusions));
state ExclusionSafetyCheckRequest req(exclusions);
state bool ddCheck;
try {
loop {
choose {
when(wait(cx->onProxiesChanged())) {}
when(ExclusionSafetyCheckReply _ddCheck =
wait(basicLoadBalance(cx->getCommitProxies(UseProvisionalProxies::False),
&CommitProxyInterface::exclusionSafetyCheckReq,
req,
cx->taskID))) {
ddCheck = _ddCheck.safe;
break;
}
}
}
} catch (Error& e) {
if (e.code() != error_code_actor_cancelled) {
TraceEvent("ExclusionSafetyCheckError")
.detail("NumExclusion", exclusions.size())
.detail("Exclusions", describe(exclusions))
.error(e);
}
throw;
}
TraceEvent("ExclusionSafetyCheckCoordinators").log();
state ClientCoordinators coordinatorList(cx->getConnectionRecord());
state std::vector<Future<Optional<LeaderInfo>>> leaderServers;
leaderServers.reserve(coordinatorList.clientLeaderServers.size());
for (int i = 0; i < coordinatorList.clientLeaderServers.size(); i++) {
leaderServers.push_back(retryBrokenPromise(coordinatorList.clientLeaderServers[i].getLeader,
GetLeaderRequest(coordinatorList.clusterKey, UID()),
TaskPriority::CoordinationReply));
}
// Wait for quorum so we don't dismiss live coordinators as unreachable by acting too fast
choose {
when(wait(smartQuorum(leaderServers, leaderServers.size() / 2 + 1, 1.0))) {}
when(wait(delay(3.0))) {
TraceEvent("ExclusionSafetyCheckNoCoordinatorQuorum").log();
return false;
}
}
int attemptCoordinatorExclude = 0;
int coordinatorsUnavailable = 0;
for (int i = 0; i < leaderServers.size(); i++) {
NetworkAddress leaderAddress =
coordinatorList.clientLeaderServers[i].getLeader.getEndpoint().getPrimaryAddress();
if (leaderServers[i].isReady()) {
if ((std::count(
exclusions.begin(), exclusions.end(), AddressExclusion(leaderAddress.ip, leaderAddress.port)) ||
std::count(exclusions.begin(), exclusions.end(), AddressExclusion(leaderAddress.ip)))) {
attemptCoordinatorExclude++;
}
} else {
coordinatorsUnavailable++;
}
}
int faultTolerance = (leaderServers.size() - 1) / 2 - coordinatorsUnavailable;
bool coordinatorCheck = (attemptCoordinatorExclude <= faultTolerance);
TraceEvent("ExclusionSafetyCheckFinish")
.detail("CoordinatorListSize", leaderServers.size())
.detail("NumExclusions", exclusions.size())
.detail("FaultTolerance", faultTolerance)
.detail("AttemptCoordinatorExclude", attemptCoordinatorExclude)
.detail("CoordinatorCheck", coordinatorCheck)
.detail("DataDistributorCheck", ddCheck);
return (ddCheck && coordinatorCheck);
}
ACTOR Future<Void> addInterfaceActor(std::map<Key, std::pair<Value, ClientLeaderRegInterface>>* address_interface,
Reference<FlowLock> connectLock,
KeyValue kv) {
wait(connectLock->take());
state FlowLock::Releaser releaser(*connectLock);
state ClientWorkerInterface workerInterf =
BinaryReader::fromStringRef<ClientWorkerInterface>(kv.value, IncludeVersion());
state ClientLeaderRegInterface leaderInterf(workerInterf.address());
choose {
when(Optional<LeaderInfo> rep =
wait(brokenPromiseToNever(leaderInterf.getLeader.getReply(GetLeaderRequest())))) {
StringRef ip_port =
kv.key.endsWith(LiteralStringRef(":tls")) ? kv.key.removeSuffix(LiteralStringRef(":tls")) : kv.key;
(*address_interface)[ip_port] = std::make_pair(kv.value, leaderInterf);
if (workerInterf.reboot.getEndpoint().addresses.secondaryAddress.present()) {
Key full_ip_port2 =
StringRef(workerInterf.reboot.getEndpoint().addresses.secondaryAddress.get().toString());
StringRef ip_port2 = full_ip_port2.endsWith(LiteralStringRef(":tls"))
? full_ip_port2.removeSuffix(LiteralStringRef(":tls"))
: full_ip_port2;
(*address_interface)[ip_port2] = std::make_pair(kv.value, leaderInterf);
}
}
when(wait(delay(CLIENT_KNOBS->CLI_CONNECT_TIMEOUT))) {} // NOTE : change timeout time here if necessary
}
return Void();
}
ACTOR static Future<int64_t> rebootWorkerActor(DatabaseContext* cx, ValueRef addr, bool check, int duration) {
// ignore negative value
if (duration < 0)
duration = 0;
// fetch the addresses of all workers
state std::map<Key, std::pair<Value, ClientLeaderRegInterface>> address_interface;
if (!cx->getConnectionRecord())
return 0;
RangeResult kvs = wait(getWorkerInterfaces(cx->getConnectionRecord()));
ASSERT(!kvs.more);
// Note: reuse this knob from fdbcli, change it if necessary
Reference<FlowLock> connectLock(new FlowLock(CLIENT_KNOBS->CLI_CONNECT_PARALLELISM));
std::vector<Future<Void>> addInterfs;
for (const auto& it : kvs) {
addInterfs.push_back(addInterfaceActor(&address_interface, connectLock, it));
}
wait(waitForAll(addInterfs));
if (!address_interface.count(addr))
return 0;
BinaryReader::fromStringRef<ClientWorkerInterface>(address_interface[addr].first, IncludeVersion())
.reboot.send(RebootRequest(false, check, duration));
return 1;
}
Future<int64_t> DatabaseContext::rebootWorker(StringRef addr, bool check, int duration) {
return rebootWorkerActor(this, addr, check, duration);
}
Future<Void> DatabaseContext::forceRecoveryWithDataLoss(StringRef dcId) {
return forceRecovery(getConnectionRecord(), dcId);
}
ACTOR static Future<Void> createSnapshotActor(DatabaseContext* cx, UID snapUID, StringRef snapCmd) {
wait(mgmtSnapCreate(cx->clone(), snapCmd, snapUID));
return Void();
}
Future<Void> DatabaseContext::createSnapshot(StringRef uid, StringRef snapshot_command) {
std::string uid_str = uid.toString();
if (!std::all_of(uid_str.begin(), uid_str.end(), [](unsigned char c) { return std::isxdigit(c); }) ||
uid_str.size() != 32) {
// only 32-length hex string is considered as a valid UID
throw snap_invalid_uid_string();
}
return createSnapshotActor(this, UID::fromString(uid_str), snapshot_command);
}
ACTOR Future<Void> storageFeedVersionUpdater(StorageServerInterface interf, ChangeFeedStorageData* self) {
state Promise<Void> destroyed = self->destroyed;
loop {
if (destroyed.isSet()) {
if (self->debug) {
fmt::print("CFSD {0}: destroyed\n", self->id.toString().substr(0, 4));
}
return Void();
}
if (self->version.get() < self->desired.get()) {
if (self->debug) {
fmt::print("CFSD {0}: update waiting {1} < {2}\n",
self->id.toString().substr(0, 4),
self->version.get(),
self->desired.get());
}
wait(delay(CLIENT_KNOBS->CHANGE_FEED_EMPTY_BATCH_TIME) || self->version.whenAtLeast(self->desired.get()));
if (destroyed.isSet()) {
if (self->debug) {
fmt::print("CFSD {0}: destroyed2\n", self->id.toString().substr(0, 4));
}
return Void();
}
if (self->debug) {
fmt::print("CFSD {0}: updated {1} < {2}\n",
self->id.toString().substr(0, 4),
self->version.get(),
self->desired.get());
}
if (self->version.get() < self->desired.get()) {
if (self->debug) {
fmt::print("CFSD {0}: requesting {1}\n", self->id.toString().substr(0, 4), self->desired.get());
}
try {
ChangeFeedVersionUpdateReply rep = wait(brokenPromiseToNever(
interf.changeFeedVersionUpdate.getReply(ChangeFeedVersionUpdateRequest(self->desired.get()))));
if (self->debug) {
fmt::print("CFSD {0}: got {1}\n", self->id.toString().substr(0, 4), rep.version);
}
if (rep.version > self->version.get()) {
if (self->debug) {
fmt::print("CFSD {0}: V={1} (req)\n", self->id.toString().substr(0, 4), rep.version);
}
self->version.set(rep.version);
}
} catch (Error& e) {
if (e.code() == error_code_server_overloaded) {
if (FLOW_KNOBS->PREVENT_FAST_SPIN_DELAY > CLIENT_KNOBS->CHANGE_FEED_EMPTY_BATCH_TIME) {
wait(delay(FLOW_KNOBS->PREVENT_FAST_SPIN_DELAY -
CLIENT_KNOBS->CHANGE_FEED_EMPTY_BATCH_TIME));
}
} else {
throw e;
}
}
}
} else {
if (self->debug) {
fmt::print("CFSD {0}: desired.WAL({1})\n", self->id.toString().substr(0, 4), self->version.get() + 1);
}
wait(self->desired.whenAtLeast(self->version.get() + 1));
}
}
}
Reference<ChangeFeedStorageData> DatabaseContext::getStorageData(StorageServerInterface interf) {
// use token from interface since that changes on SS restart
UID token = interf.waitFailure.getEndpoint().token;
auto it = changeFeedUpdaters.find(token);
if (it == changeFeedUpdaters.end()) {
Reference<ChangeFeedStorageData> newStorageUpdater = makeReference<ChangeFeedStorageData>();
newStorageUpdater->id = interf.id();
newStorageUpdater->interfToken = token;
newStorageUpdater->updater = storageFeedVersionUpdater(interf, newStorageUpdater.getPtr());
changeFeedUpdaters[token] = newStorageUpdater;
return newStorageUpdater;
}
return it->second;
}
Version ChangeFeedData::getVersion() {
// FIXME: add back in smarter version check later
/*if (notAtLatest.get() == 0 && mutations.isEmpty()) {
Version v = storageData[0]->version.get();
for (int i = 1; i < storageData.size(); i++) {
if (storageData[i]->version.get() < v) {
v = storageData[i]->version.get();
}
}
return std::max(v, lastReturnedVersion.get());
}
*/
return lastReturnedVersion.get();
}
// TODO REMOVE when BG is correctness clean
// To debug a waitLatest at wait_version returning early, set wait_version to the version, and start+end to a version
// range that surrounds wait_version enough to figure out what's going on
// DEBUG_CF_ID is optional
#define DEBUG_CF_ID ""_sr
#define DEBUG_CF_START_VERSION invalidVersion
#define DEBUG_CF_END_VERSION invalidVersion
#define DEBUG_CF_WAIT_VERSION invalidVersion
#define DEBUG_CF_VERSION(cfId, v) \
DEBUG_CF_START_VERSION <= v&& v <= DEBUG_CF_END_VERSION && (""_sr == DEBUG_CF_ID || cfId.printable() == DEBUG_CF_ID)
#define DEBUG_CF_VERSION_RANGE(cfId, vStart, vEnd) \
DEBUG_CF_START_VERSION <= vEnd&& vStart <= DEBUG_CF_END_VERSION && \
(""_sr == DEBUG_CF_ID || cfId.printable() == DEBUG_CF_ID)
#define DEBUG_CF_WAIT(cfId, v) DEBUG_CF_WAIT_VERSION == v && (""_sr == DEBUG_CF_ID || cfId.printable() == DEBUG_CF_ID)
// This function is essentially bubbling the information about what has been processed from the server through the
// change feed client. First it makes sure the server has returned all mutations up through the target version, the
// native api has consumed and processed, them, and then the fdb client has consumed all of the mutations.
ACTOR Future<Void> changeFeedWaitLatest(Reference<ChangeFeedData> self, Version version) {
// wait on SS to have sent up through version
int desired = 0;
int waiting = 0;
std::vector<Future<Void>> allAtLeast;
for (auto& it : self->storageData) {
if (it->version.get() < version) {
waiting++;
if (version > it->desired.get()) {
if (DEBUG_CF_WAIT(self->id, version)) {
it->debug = true;
}
it->desired.set(version);
desired++;
}
allAtLeast.push_back(it->version.whenAtLeast(version));
}
}
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WaitLatest: waiting for {1}/{2} ss ({3} < desired)\n",
version,
waiting,
self->storageData.size(),
desired);
}
wait(waitForAll(allAtLeast));
// then, wait on ss streams to have processed up through version
std::vector<Future<Void>> onEmpty;
for (auto& it : self->streams) {
if (!it.isEmpty()) {
onEmpty.push_back(it.onEmpty());
}
}
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WaitLatest: waiting for {1} ss onEmpty\n", version, onEmpty.size());
}
if (onEmpty.size()) {
wait(waitForAll(onEmpty));
}
if (self->mutations.isEmpty()) {
wait(delay(0));
}
// wait for merge cursor to fully process everything it read from its individual promise streams, either until it is
// done processing or we have up through the desired version
while (self->lastReturnedVersion.get() < self->maxSeenVersion && self->lastReturnedVersion.get() < version) {
Version target = std::min(self->maxSeenVersion, version);
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WaitLatest: waiting merge lastReturned >= {1}\n", version, target);
}
wait(self->lastReturnedVersion.whenAtLeast(target));
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print(
"CFW {0}) WaitLatest: got merge lastReturned {1}\n", version, self->lastReturnedVersion.get());
}
}
// then, wait for client to have consumed up through version
if (self->maxSeenVersion >= version) {
// merge cursor may have something buffered but has not yet sent it to self->mutations, just wait for
// lastReturnedVersion
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WaitLatest: maxSeenVersion -> waiting lastReturned\n", version);
}
wait(self->lastReturnedVersion.whenAtLeast(version));
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WaitLatest: maxSeenVersion -> got lastReturned\n", version);
}
} else {
// all mutations <= version are in self->mutations, wait for empty
while (!self->mutations.isEmpty()) {
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WaitLatest: waiting for client onEmpty\n", version);
}
wait(self->mutations.onEmpty());
wait(delay(0));
}
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WaitLatest: done\n", version);
}
}
return Void();
}
ACTOR Future<Void> changeFeedWhenAtLatest(Reference<ChangeFeedData> self, Version version) {
if (version >= self->endVersion) {
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print(
"CFW {0}) WhenAtLeast: After CF end version {1}, returning Never()\n", version, self->endVersion);
}
return Never();
}
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WhenAtLeast: LR={1}\n", version, self->lastReturnedVersion.get());
}
if (version <= self->getVersion()) {
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WhenAtLeast: Already done\n", version, self->lastReturnedVersion.get());
}
return Void();
}
state Future<Void> lastReturned = self->lastReturnedVersion.whenAtLeast(version);
loop {
if (DEBUG_CF_WAIT(self->id, version)) {
fmt::print("CFW {0}) WhenAtLeast: NotAtLatest={1}\n", version, self->notAtLatest.get());
}
// only allowed to use empty versions if you're caught up
Future<Void> waitEmptyVersion = (self->notAtLatest.get() == 0) ? changeFeedWaitLatest(self, version) : Never();
choose {
when(wait(waitEmptyVersion)) { break; }
when(wait(lastReturned)) { break; }
when(wait(self->refresh.getFuture())) {}
when(wait(self->notAtLatest.onChange())) {}
}
}
if (DEBUG_CF_VERSION(self->id, version)) {
fmt::print("CFLR (WAL): {0}\n", version);
}
if (self->lastReturnedVersion.get() < version) {
self->lastReturnedVersion.set(version);
}
ASSERT(self->getVersion() >= version);
return Void();
}
Future<Void> ChangeFeedData::whenAtLeast(Version version) {
return changeFeedWhenAtLatest(Reference<ChangeFeedData>::addRef(this), version);
}
ACTOR Future<Void> partialChangeFeedStream(StorageServerInterface interf,
PromiseStream<Standalone<MutationsAndVersionRef>> results,
ReplyPromiseStream<ChangeFeedStreamReply> replyStream,
Version begin,
Version end,
Reference<ChangeFeedData> feedData,
Reference<ChangeFeedStorageData> storageData,
int idx /* TODO REMOVE this param after correctness clean */,
KeyRange range /* TODO REMOVE this param after correctness clean */,
UID debugID /*TODO REMOVE this param after correctness clean*/) {
// calling lastReturnedVersion's callbacks could cause us to be cancelled
state Promise<Void> refresh = feedData->refresh;
state bool atLatestVersion = false;
state Version nextVersion = begin;
try {
loop {
if (nextVersion >= end) {
if (DEBUG_CF_VERSION(feedData->id, end)) {
fmt::print(" single {0} {1} [{2} - {3}): sending EOS\n",
idx,
interf.id().toString().substr(0, 4),
range.begin.printable(),
range.end.printable());
}
results.sendError(end_of_stream());
return Void();
}
choose {
when(state ChangeFeedStreamReply rep = waitNext(replyStream.getFuture())) {
if (DEBUG_CF_VERSION_RANGE(
feedData->id, rep.mutations.front().version, rep.mutations.back().version)) {
fmt::print(" single {0} {1} {2}: response {3} - {4} ({5}), atLatest={6}, rep.atLatest={7}, "
"notAtLatest={8}, minSV={9}\n",
idx,
interf.id().toString().substr(0, 4),
debugID.toString().substr(0, 8).c_str(),
rep.mutations.front().version,
rep.mutations.back().version,
rep.mutations.size(),
atLatestVersion ? "T" : "F",
rep.atLatestVersion ? "T" : "F",
feedData->notAtLatest.get(),
rep.minStreamVersion);
}
// handle first empty mutation on stream establishment explicitly
if (nextVersion == begin && rep.mutations.size() == 1 && rep.mutations[0].mutations.size() == 0 &&
rep.mutations[0].version == begin - 1) {
continue;
}
if (rep.mutations.back().version > feedData->maxSeenVersion) {
feedData->maxSeenVersion = rep.mutations.back().version;
}
if (rep.popVersion > feedData->popVersion) {
feedData->popVersion = rep.popVersion;
}
state int resultLoc = 0;
while (resultLoc < rep.mutations.size()) {
wait(results.onEmpty());
if (DEBUG_CF_VERSION(feedData->id, rep.mutations[resultLoc].version)) {
fmt::print(" single {0} {1} [{2} - {3}): sending {4}/{5} {6} ({7})\n",
idx,
interf.id().toString().substr(0, 4),
range.begin.printable(),
range.end.printable(),
resultLoc,
rep.mutations.size(),
rep.mutations[resultLoc].version,
rep.mutations[resultLoc].mutations.size());
}
if (rep.mutations[resultLoc].version >= nextVersion) {
results.send(rep.mutations[resultLoc]);
} else {
// TODO REMOVE eventually, useful for debugging for now
if (!rep.mutations[resultLoc].mutations.empty()) {
fmt::print("non-empty mutations ({0}), but versions out of order from {1} for {2} cf "
"{3}! mv={4}, nv={5}\n",
rep.mutations.size(),
interf.id().toString().substr(0, 4),
idx,
feedData->id.toString().substr(0, 6),
rep.mutations[resultLoc].version,
nextVersion);
for (auto& it : rep.mutations[resultLoc].mutations) {
if (it.type == MutationRef::SetValue) {
printf(" %s=", it.param1.printable().c_str());
} else {
printf(
" %s - %s", it.param1.printable().c_str(), it.param2.printable().c_str());
}
}
}
ASSERT(rep.mutations[resultLoc].mutations.empty());
}
resultLoc++;
}
// if we got the empty version that went backwards, don't decrease nextVersion
if (rep.mutations.back().version + 1 > nextVersion) {
nextVersion = rep.mutations.back().version + 1;
}
// check refresh.canBeSet so that, if we are killed after calling one of these callbacks, we just
// skip to the next wait and get actor_cancelled
if (refresh.canBeSet() && !atLatestVersion && rep.atLatestVersion) {
atLatestVersion = true;
feedData->notAtLatest.set(feedData->notAtLatest.get() - 1);
}
if (refresh.canBeSet() && rep.minStreamVersion > storageData->version.get()) {
storageData->version.set(rep.minStreamVersion);
}
for (auto& it : feedData->storageData) {
if (refresh.canBeSet() && rep.mutations.back().version > it->desired.get()) {
it->desired.set(rep.mutations.back().version);
}
}
}
when(wait(atLatestVersion && replyStream.isEmpty() && results.isEmpty()
? storageData->version.whenAtLeast(nextVersion)
: Future<Void>(Never()))) {
if (DEBUG_CF_VERSION(feedData->id, nextVersion)) {
fmt::print(" single {0} {1}: WAL {2}, sending empty {3})\n",
idx,
interf.id().toString().substr(0, 4),
nextVersion,
storageData->version.get());
}
MutationsAndVersionRef empty;
empty.version = storageData->version.get();
results.send(empty);
nextVersion = storageData->version.get() + 1;
}
when(wait(atLatestVersion && replyStream.isEmpty() && !results.isEmpty() ? results.onEmpty()
: Future<Void>(Never()))) {
if (DEBUG_CF_VERSION(feedData->id, nextVersion)) {
fmt::print(" single {0} {1}: got onEmpty\n", idx, interf.id().toString().substr(0, 4));
}
}
}
}
} catch (Error& e) {
// TODO REMOVE eventually, useful for debugging for now
// if (DEBUG_CF_VERSION(feedData->id, nextVersion)) {
fmt::print(" single {0} {1} {2} [{3} - {4}): CFError {5}\n",
idx,
interf.id().toString().substr(0, 4),
debugID.toString().substr(0, 8).c_str(),
range.begin.printable(),
range.end.printable(),
e.name());
// }
if (e.code() == error_code_actor_cancelled) {
throw;
}
results.sendError(e);
return Void();
}
}
// TODO better name
ACTOR Future<Void> doCFMerge(Reference<ChangeFeedData> results,
std::vector<std::pair<StorageServerInterface, KeyRange>> interfs,
std::vector<MutationAndVersionStream> streams,
Version* begin,
Version end) {
// TODO REMOVE, a sanity check
state int eosCount = 0;
state Promise<Void> refresh = results->refresh;
// with empty version handling in the partial cursor, all streams will always have a next element with version >=
// the minimum version of any stream's next element
state std::priority_queue<MutationAndVersionStream, std::vector<MutationAndVersionStream>> mutations;
// previous version of change feed may have put a mutation in the promise stream and then immediately died. Wait for
// that mutation first, so the promise stream always starts empty
wait(results->mutations.onEmpty());
wait(delay(0));
ASSERT(results->mutations.isEmpty());
// update lastReturned once the previous mutation has been consumed
if (*begin - 1 > results->lastReturnedVersion.get()) {
results->lastReturnedVersion.set(*begin - 1);
}
state int interfNum = 0;
// TODO minor optimization - could make this just a vector of indexes if each MutationAndVersionStream remembered
// its version index
state std::vector<MutationAndVersionStream> streamsUsed;
// initially, pull from all streams
for (auto& stream : streams) {
streamsUsed.push_back(stream);
}
state Version nextVersion;
loop {
// bring all of the streams up to date to ensure we have the latest element from each stream in mutations
interfNum = 0;
while (interfNum < streamsUsed.size()) {
try {
Standalone<MutationsAndVersionRef> res = waitNext(streamsUsed[interfNum].results.getFuture());
streamsUsed[interfNum].next = res;
mutations.push(streamsUsed[interfNum]);
} catch (Error& e) {
if (e.code() != error_code_end_of_stream) {
throw e;
}
eosCount++;
}
interfNum++;
}
ASSERT(streams.size() - mutations.size() == eosCount);
if (mutations.empty()) {
throw end_of_stream();
}
streamsUsed.clear();
// Without this delay, weird issues with the last stream getting on another stream's callstack can happen
wait(delay(0));
// pop first item off queue - this will be mutation with the lowest version
Standalone<VectorRef<MutationsAndVersionRef>> nextOut;
nextVersion = mutations.top().next.version;
streamsUsed.push_back(mutations.top());
nextOut.push_back_deep(nextOut.arena(), mutations.top().next);
mutations.pop();
// for each other stream that has mutations with the same version, add it to nextOut
while (!mutations.empty() && mutations.top().next.version == nextVersion) {
if (mutations.top().next.mutations.size() &&
mutations.top().next.mutations.front().param1 != lastEpochEndPrivateKey) {
nextOut.back().mutations.append_deep(
nextOut.arena(), mutations.top().next.mutations.begin(), mutations.top().next.mutations.size());
}
streamsUsed.push_back(mutations.top());
mutations.pop();
}
ASSERT(nextOut.size() == 1);
ASSERT(nextVersion >= *begin);
*begin = nextVersion + 1;
if (DEBUG_CF_VERSION(results->id, nextOut.back().version)) {
fmt::print("CFNA (merged): {0} ({1})\n", nextOut.back().version, nextOut.back().mutations.size());
}
// send mutations at nextVersion to the client
if (nextOut.back().mutations.empty()) {
ASSERT(results->mutations.isEmpty());
} else {
// TODO REMOVE, for debugging
if (nextOut.back().version <= results->lastReturnedVersion.get()) {
fmt::print("ERROR: merge cursor got mutations {0} <= lastReturnedVersion {1}",
nextOut.back().version,
results->lastReturnedVersion.get());
}
ASSERT(nextOut.back().version > results->lastReturnedVersion.get());
results->mutations.send(nextOut);
wait(results->mutations.onEmpty());
wait(delay(0));
}
if (DEBUG_CF_VERSION(results->id, nextVersion)) {
fmt::print("CFLR (merged): {0}\n", nextVersion);
}
if (nextVersion > results->lastReturnedVersion.get()) {
results->lastReturnedVersion.set(nextVersion);
}
}
}
ACTOR Future<Void> onCFErrors(std::vector<Future<Void>> onErrors) {
wait(waitForAny(onErrors));
// propagate error - TODO better way?
for (auto& f : onErrors) {
if (f.isError()) {
throw f.getError();
}
}
ASSERT(false);
return Void();
}
ACTOR Future<Void> mergeChangeFeedStream(Reference<DatabaseContext> db,
std::vector<std::pair<StorageServerInterface, KeyRange>> interfs,
Reference<ChangeFeedData> results,
Key rangeID,
Version* begin,
Version end,
int replyBufferSize,
bool canReadPopped) {
state std::vector<Future<Void>> fetchers(interfs.size());
state std::vector<Future<Void>> onErrors(interfs.size());
state std::vector<MutationAndVersionStream> streams(interfs.size());
std::vector<UID> debugIDs;
results->streams.clear();
for (auto& it : interfs) {
ChangeFeedStreamRequest req;
req.rangeID = rangeID;
req.begin = *begin;
req.end = end;
req.range = it.second;
req.canReadPopped = canReadPopped;
// divide total buffer size among sub-streams, but keep individual streams large enough to be efficient
req.replyBufferSize = replyBufferSize / interfs.size();
if (replyBufferSize != -1 && req.replyBufferSize < CLIENT_KNOBS->CHANGE_FEED_STREAM_MIN_BYTES) {
req.replyBufferSize = CLIENT_KNOBS->CHANGE_FEED_STREAM_MIN_BYTES;
}
UID debugID = deterministicRandom()->randomUniqueID();
debugIDs.push_back(debugID);
req.debugID = debugID;
results->streams.push_back(it.first.changeFeedStream.getReplyStream(req));
}
for (auto& it : results->storageData) {
if (it->debugGetReferenceCount() == 2) {
db->changeFeedUpdaters.erase(it->interfToken);
}
}
results->maxSeenVersion = invalidVersion;
results->storageData.clear();
Promise<Void> refresh = results->refresh;
results->refresh = Promise<Void>();
for (int i = 0; i < interfs.size(); i++) {
results->storageData.push_back(db->getStorageData(interfs[i].first));
}
results->notAtLatest.set(interfs.size());
refresh.send(Void());
if (DEBUG_CF_START_VERSION != invalidVersion) {
fmt::print("Starting merge cursor for {0} @ {1} - {2}\n", interfs.size(), *begin, end);
}
for (int i = 0; i < interfs.size(); i++) {
onErrors[i] = results->streams[i].onError();
fetchers[i] = partialChangeFeedStream(interfs[i].first,
streams[i].results,
results->streams[i],
*begin,
end,
results,
results->storageData[i],
i,
interfs[i].second,
debugIDs[i]);
if (DEBUG_CF_START_VERSION != invalidVersion) {
fmt::print(" [{0} - {1}): {2} {3}\n",
interfs[i].second.begin.printable(),
interfs[i].second.end.printable(),
i,
debugIDs[i].toString().substr(0, 8));
}
}
wait(onCFErrors(onErrors) || doCFMerge(results, interfs, streams, begin, end));
return Void();
}
ACTOR Future<KeyRange> getChangeFeedRange(Reference<DatabaseContext> db, Database cx, Key rangeID, Version begin = 0) {
state Transaction tr(cx);
state Key rangeIDKey = rangeID.withPrefix(changeFeedPrefix);
auto cacheLoc = db->changeFeedCache.find(rangeID);
if (cacheLoc != db->changeFeedCache.end()) {
return cacheLoc->second;
}
loop {
try {
tr.setOption(FDBTransactionOptions::READ_SYSTEM_KEYS);
Version readVer = wait(tr.getReadVersion());
if (readVer < begin) {
wait(delay(FLOW_KNOBS->PREVENT_FAST_SPIN_DELAY));
tr.reset();
} else {
Optional<Value> val = wait(tr.get(rangeIDKey));
if (!val.present()) {
throw change_feed_not_registered();
}
if (db->changeFeedCache.size() > CLIENT_KNOBS->CHANGE_FEED_CACHE_SIZE) {
db->changeFeedCache.clear();
}
KeyRange range = std::get<0>(decodeChangeFeedValue(val.get()));
db->changeFeedCache[rangeID] = range;
return range;
}
} catch (Error& e) {
wait(tr.onError(e));
}
}
}
ACTOR Future<Void> doSingleCFStream(KeyRange range,
Reference<ChangeFeedData> results,
Key rangeID,
Version* begin,
Version end,
UID debugID /*TODO REMOVE this parameter once BG is correctness clean*/) {
state Promise<Void> refresh = results->refresh;
ASSERT(results->streams.size() == 1);
ASSERT(results->storageData.size() == 1);
state bool atLatest = false;
// wait for any previous mutations in stream to be consumed
wait(results->mutations.onEmpty());
wait(delay(0));
ASSERT(results->mutations.isEmpty());
// update lastReturned once the previous mutation has been consumed
if (*begin - 1 > results->lastReturnedVersion.get()) {
results->lastReturnedVersion.set(*begin - 1);
}
loop {
state ChangeFeedStreamReply feedReply = waitNext(results->streams[0].getFuture());
*begin = feedReply.mutations.back().version + 1;
if (feedReply.popVersion > results->popVersion) {
results->popVersion = feedReply.popVersion;
}
// don't send completely empty set of mutations to promise stream
bool anyMutations = false;
for (auto& it : feedReply.mutations) {
if (!it.mutations.empty()) {
anyMutations = true;
break;
}
}
if (anyMutations) {
// empty versions can come out of order, as we sometimes send explicit empty versions when restarting a
// stream. Anything with mutations should be strictly greater than lastReturnedVersion
if (feedReply.mutations.front().version <= results->lastReturnedVersion.get()) {
fmt::print("out of order mutation for CF {0} Req {1} from ({2}) {3}! {4} < {5}\n",
rangeID.toString().substr(0, 6),
debugID.toString().substr(0, 8),
results->storageData.size(),
results->storageData[0]->id.toString().substr(0, 4).c_str(),
feedReply.mutations.front().version,
results->lastReturnedVersion.get());
}
ASSERT(feedReply.mutations.front().version > results->lastReturnedVersion.get());
results->mutations.send(
Standalone<VectorRef<MutationsAndVersionRef>>(feedReply.mutations, feedReply.arena));
// Because onEmpty returns here before the consuming process, we must do a delay(0)
wait(results->mutations.onEmpty());
wait(delay(0));
}
if (DEBUG_CF_VERSION(rangeID, feedReply.mutations.back().version)) {
fmt::print("CFLR (single) {0}: {1} ({2}), atLatest={3}, rep.atLatest={4}, notAtLatest={5}, minSV={6}\n",
debugID.toString().substr(0, 8),
feedReply.mutations.back().version,
feedReply.mutations.size(),
atLatest ? "T" : "F",
feedReply.atLatestVersion ? "T" : "F",
results->notAtLatest.get(),
feedReply.minStreamVersion);
}
// check refresh.canBeSet so that, if we are killed after calling one of these callbacks, we just
// skip to the next wait and get actor_cancelled
if (feedReply.mutations.back().version > results->lastReturnedVersion.get()) {
results->lastReturnedVersion.set(feedReply.mutations.back().version);
}
if (refresh.canBeSet() && !atLatest && feedReply.atLatestVersion) {
atLatest = true;
results->notAtLatest.set(0);
}
if (refresh.canBeSet() && feedReply.minStreamVersion > results->storageData[0]->version.get()) {
if (results->storageData[0]->debug) {
fmt::print("CFSD {0}: V={1} (CFLR)\n",
results->storageData[0]->id.toString().substr(0, 4),
results->storageData[0]->version.get());
}
results->storageData[0]->version.set(feedReply.minStreamVersion);
}
}
}
ACTOR Future<Void> singleChangeFeedStream(Reference<DatabaseContext> db,
StorageServerInterface interf,
KeyRange range,
Reference<ChangeFeedData> results,
Key rangeID,
Version* begin,
Version end,
int replyBufferSize,
bool canReadPopped) {
state Database cx(db);
state ChangeFeedStreamRequest req;
state UID debugID = deterministicRandom()->randomUniqueID();
req.rangeID = rangeID;
req.begin = *begin;
req.end = end;
req.range = range;
req.canReadPopped = canReadPopped;
req.replyBufferSize = replyBufferSize;
req.debugID = debugID;
results->streams.clear();
for (auto& it : results->storageData) {
if (it->debugGetReferenceCount() == 2) {
db->changeFeedUpdaters.erase(it->interfToken);
}
}
results->streams.push_back(interf.changeFeedStream.getReplyStream(req));
results->maxSeenVersion = invalidVersion;
results->storageData.clear();
results->storageData.push_back(db->getStorageData(interf));
Promise<Void> refresh = results->refresh;
results->refresh = Promise<Void>();
results->notAtLatest.set(1);
refresh.send(Void());
if (DEBUG_CF_START_VERSION != invalidVersion) {
fmt::print("Starting single cursor {0} for [{1} - {2}) @ {3} - {4} from {5}\n",
debugID.toString().substr(0, 8),
range.begin.printable(),
range.end.printable(),
*begin,
end,
interf.id().toString().c_str());
}
wait(results->streams[0].onError() || doSingleCFStream(range, results, rangeID, begin, end, debugID));
return Void();
}
ACTOR Future<Void> getChangeFeedStreamActor(Reference<DatabaseContext> db,
Reference<ChangeFeedData> results,
Key rangeID,
Version begin,
Version end,
KeyRange range,
int replyBufferSize,
bool canReadPopped) {
state Database cx(db);
state Span span("NAPI:GetChangeFeedStream"_loc);
results->id = rangeID;
results->endVersion = end;
/*printf("CFStream %s [%s - %s): [%lld - %lld]\n",
rangeID.printable().substr(0, 6).c_str(),
range.begin.printable().c_str(),
range.end.printable().c_str(),
begin,
end);*/
loop {
state KeyRange keys;
try {
KeyRange fullRange = wait(getChangeFeedRange(db, cx, rangeID, begin));
keys = fullRange & range;
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(cx,
keys,
CLIENT_KNOBS->CHANGE_FEED_LOCATION_LIMIT,
Reverse::False,
&StorageServerInterface::changeFeedStream,
span.context,
Optional<UID>(),
UseProvisionalProxies::False));
if (locations.size() >= CLIENT_KNOBS->CHANGE_FEED_LOCATION_LIMIT) {
ASSERT_WE_THINK(false);
throw unknown_change_feed();
}
state std::vector<int> chosenLocations(locations.size());
state int loc = 0;
while (loc < locations.size()) {
// FIXME: create a load balance function for this code so future users of reply streams do not have
// to duplicate this code
int count = 0;
int useIdx = -1;
for (int i = 0; i < locations[loc].second->size(); i++) {
if (!IFailureMonitor::failureMonitor()
.getState(
locations[loc].second->get(i, &StorageServerInterface::changeFeedStream).getEndpoint())
.failed) {
if (deterministicRandom()->random01() <= 1.0 / ++count) {
useIdx = i;
}
}
}
if (useIdx >= 0) {
chosenLocations[loc] = useIdx;
loc++;
continue;
}
std::vector<Future<Void>> ok(locations[loc].second->size());
for (int i = 0; i < ok.size(); i++) {
ok[i] = IFailureMonitor::failureMonitor().onStateEqual(
locations[loc].second->get(i, &StorageServerInterface::changeFeedStream).getEndpoint(),
FailureStatus(false));
}
// Making this SevWarn means a lot of clutter
if (now() - g_network->networkInfo.newestAlternativesFailure > 1 ||
deterministicRandom()->random01() < 0.01) {
TraceEvent("AllAlternativesFailed").detail("Alternatives", locations[0].second->description());
}
wait(allAlternativesFailedDelay(quorum(ok, 1)));
loc = 0;
}
if (locations.size() > 1) {
std::vector<std::pair<StorageServerInterface, KeyRange>> interfs;
for (int i = 0; i < locations.size(); i++) {
interfs.emplace_back(locations[i].second->getInterface(chosenLocations[i]),
locations[i].first & range);
}
wait(
mergeChangeFeedStream(db, interfs, results, rangeID, &begin, end, replyBufferSize, canReadPopped) ||
cx->connectionFileChanged());
} else {
StorageServerInterface interf = locations[0].second->getInterface(chosenLocations[0]);
wait(singleChangeFeedStream(
db, interf, range, results, rangeID, &begin, end, replyBufferSize, canReadPopped) ||
cx->connectionFileChanged());
}
} catch (Error& e) {
fmt::print("CFNA error {}\n", e.name());
if (e.code() == error_code_actor_cancelled || e.code() == error_code_change_feed_popped) {
for (auto& it : results->storageData) {
if (it->debugGetReferenceCount() == 2) {
db->changeFeedUpdaters.erase(it->interfToken);
}
}
results->streams.clear();
results->storageData.clear();
if (e.code() == error_code_change_feed_popped) {
results->mutations.sendError(e);
results->refresh.sendError(e);
} else {
results->refresh.sendError(change_feed_cancelled());
}
throw;
}
// TODO REMOVE
// fmt::print("CFNA error {}\n", e.name());
if (results->notAtLatest.get() == 0) {
results->notAtLatest.set(1);
}
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_all_alternatives_failed ||
e.code() == error_code_connection_failed || e.code() == error_code_unknown_change_feed ||
e.code() == error_code_broken_promise) {
// TODO: add some exponential backoff (with a reasonable cap) when retrying if we didn't advance
// beginVersion at all before getting an error
db->changeFeedCache.erase(rangeID);
cx->invalidateCache(keys);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY));
} else {
results->mutations.sendError(e);
results->refresh.sendError(change_feed_cancelled());
for (auto& it : results->storageData) {
if (it->debugGetReferenceCount() == 2) {
db->changeFeedUpdaters.erase(it->interfToken);
}
}
results->streams.clear();
results->storageData.clear();
return Void();
}
}
}
}
Future<Void> DatabaseContext::getChangeFeedStream(Reference<ChangeFeedData> results,
Key rangeID,
Version begin,
Version end,
KeyRange range,
int replyBufferSize,
bool canReadPopped) {
return getChangeFeedStreamActor(
Reference<DatabaseContext>::addRef(this), results, rangeID, begin, end, range, replyBufferSize, canReadPopped);
}
ACTOR Future<std::vector<OverlappingChangeFeedEntry>> singleLocationOverlappingChangeFeeds(
Database cx,
Reference<LocationInfo> location,
KeyRangeRef range,
Version minVersion) {
state OverlappingChangeFeedsRequest req;
req.range = range;
req.minVersion = minVersion;
OverlappingChangeFeedsReply rep = wait(loadBalance(cx.getPtr(),
location,
&StorageServerInterface::overlappingChangeFeeds,
req,
TaskPriority::DefaultPromiseEndpoint,
AtMostOnce::False,
cx->enableLocalityLoadBalance ? &cx->queueModel : nullptr));
return rep.rangeIds;
}
bool compareChangeFeedResult(const OverlappingChangeFeedEntry& i, const OverlappingChangeFeedEntry& j) {
return i.rangeId < j.rangeId;
}
ACTOR Future<std::vector<OverlappingChangeFeedEntry>> getOverlappingChangeFeedsActor(Reference<DatabaseContext> db,
KeyRangeRef range,
Version minVersion) {
state Database cx(db);
state Transaction tr(cx);
state Span span("NAPI:GetOverlappingChangeFeeds"_loc);
loop {
try {
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(cx,
range,
CLIENT_KNOBS->CHANGE_FEED_LOCATION_LIMIT,
Reverse::False,
&StorageServerInterface::overlappingChangeFeeds,
span.context,
Optional<UID>(),
UseProvisionalProxies::False));
if (locations.size() >= CLIENT_KNOBS->CHANGE_FEED_LOCATION_LIMIT) {
TraceEvent(SevError, "OverlappingRangeTooLarge")
.detail("Range", range)
.detail("Limit", CLIENT_KNOBS->CHANGE_FEED_LOCATION_LIMIT);
wait(delay(1.0));
throw all_alternatives_failed();
}
state std::vector<Future<std::vector<OverlappingChangeFeedEntry>>> allOverlappingRequests;
for (auto& it : locations) {
allOverlappingRequests.push_back(
singleLocationOverlappingChangeFeeds(cx, it.second, it.first & range, minVersion));
}
wait(waitForAll(allOverlappingRequests));
std::vector<OverlappingChangeFeedEntry> result;
for (auto& it : allOverlappingRequests) {
result.insert(result.end(), it.get().begin(), it.get().end());
}
std::sort(result.begin(), result.end(), compareChangeFeedResult);
result.resize(std::unique(result.begin(), result.end()) - result.begin());
return result;
} catch (Error& e) {
if (e.code() == error_code_wrong_shard_server || e.code() == error_code_all_alternatives_failed) {
cx->invalidateCache(range);
wait(delay(CLIENT_KNOBS->WRONG_SHARD_SERVER_DELAY));
} else {
throw e;
}
}
}
}
Future<std::vector<OverlappingChangeFeedEntry>> DatabaseContext::getOverlappingChangeFeeds(KeyRangeRef range,
Version minVersion) {
return getOverlappingChangeFeedsActor(Reference<DatabaseContext>::addRef(this), range, minVersion);
}
ACTOR static Future<Void> popChangeFeedBackup(Database cx, Key rangeID, Version version) {
state Transaction tr(cx);
loop {
try {
tr.setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
state Key rangeIDKey = rangeID.withPrefix(changeFeedPrefix);
Optional<Value> val = wait(tr.get(rangeIDKey));
if (val.present()) {
KeyRange range;
Version popVersion;
ChangeFeedStatus status;
std::tie(range, popVersion, status) = decodeChangeFeedValue(val.get());
if (version > popVersion) {
tr.set(rangeIDKey, changeFeedValue(range, version, status));
}
} else {
throw change_feed_not_registered();
}
wait(tr.commit());
return Void();
} catch (Error& e) {
wait(tr.onError(e));
}
}
}
ACTOR Future<Void> popChangeFeedMutationsActor(Reference<DatabaseContext> db, Key rangeID, Version version) {
state Database cx(db);
state Key rangeIDKey = rangeID.withPrefix(changeFeedPrefix);
state Span span("NAPI:PopChangeFeedMutations"_loc);
state KeyRange keys = wait(getChangeFeedRange(db, cx, rangeID));
state std::vector<std::pair<KeyRange, Reference<LocationInfo>>> locations =
wait(getKeyRangeLocations(cx,
keys,
3,
Reverse::False,
&StorageServerInterface::changeFeedPop,
span.context,
Optional<UID>(),
UseProvisionalProxies::False));
if (locations.size() > 2) {
wait(popChangeFeedBackup(cx, rangeID, version));
return Void();
}
bool foundFailed = false;
for (int i = 0; i < locations.size() && !foundFailed; i++) {
for (int j = 0; j < locations[i].second->size() && !foundFailed; j++) {
if (IFailureMonitor::failureMonitor()
.getState(locations[i].second->get(j, &StorageServerInterface::changeFeedPop).getEndpoint())
.isFailed()) {
foundFailed = true;
}
}
}
if (foundFailed) {
wait(popChangeFeedBackup(cx, rangeID, version));
return Void();
}
try {
// FIXME: lookup both the src and dest shards as of the pop version to ensure all locations are popped
std::vector<Future<Void>> popRequests;
for (int i = 0; i < locations.size(); i++) {
for (int j = 0; j < locations[i].second->size(); j++) {
popRequests.push_back(locations[i].second->getInterface(j).changeFeedPop.getReply(
ChangeFeedPopRequest(rangeID, version, locations[i].first)));
}
}
choose {
when(wait(waitForAll(popRequests))) {}
when(wait(delay(CLIENT_KNOBS->CHANGE_FEED_POP_TIMEOUT))) {
wait(popChangeFeedBackup(cx, rangeID, version));
}
}
} catch (Error& e) {
if (e.code() != error_code_unknown_change_feed && e.code() != error_code_wrong_shard_server &&
e.code() != error_code_all_alternatives_failed && e.code() != error_code_broken_promise &&
e.code() != error_code_server_overloaded) {
throw;
}
db->changeFeedCache.erase(rangeID);
cx->invalidateCache(keys);
wait(popChangeFeedBackup(cx, rangeID, version));
}
return Void();
}
Future<Void> DatabaseContext::popChangeFeedMutations(Key rangeID, Version version) {
return popChangeFeedMutationsActor(Reference<DatabaseContext>::addRef(this), rangeID, version);
}
Reference<DatabaseContext::TransactionT> DatabaseContext::createTransaction() {
return makeReference<ReadYourWritesTransaction>(Database(Reference<DatabaseContext>::addRef(this)));
}
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