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netty: avoid unintentionally NullPointerException (#3932)

This commit is contained in:
Shohei Kamimori 2018-01-18 08:47:45 +09:00 committed by Kun Zhang
parent c51b9271fb
commit b5ae13405f
1 changed files with 2 additions and 1 deletions
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3
netty/src/main/java/io/grpc/netty/NettyServerHandler.java
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@ -31,6 +31,7 @@ import static io.netty.handler.codec.http2.DefaultHttp2LocalFlowController.DEFAU
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import io.grpc.Attributes;
import io.grpc.InternalMetadata;
import io.grpc.InternalStatus;
@ -710,7 +711,7 @@ class NettyServerHandler extends AbstractNettyHandler {
private Http2Exception newStreamException(int streamId, Throwable cause) {
return Http2Exception.streamError(
streamId, Http2Error.INTERNAL_ERROR, cause, cause.getMessage());
streamId, Http2Error.INTERNAL_ERROR, cause, Strings.nullToEmpty(cause.getMessage()));
}
private class FrameListener extends Http2FrameAdapter {