From 2383ef04def41cc449388430b6db5764c39f61fb Mon Sep 17 00:00:00 2001
From: eric <eric.zhang1@huawei.com>
Date: Wed, 20 May 2020 12:56:07 -0400
Subject: [PATCH] Added warning message

---
 mindspore/dataset/engine/datasets.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mindspore/dataset/engine/datasets.py b/mindspore/dataset/engine/datasets.py
index 20a40d5fb0d..40ea903b9b5 100644
--- a/mindspore/dataset/engine/datasets.py
+++ b/mindspore/dataset/engine/datasets.py
@@ -1301,6 +1301,8 @@ class SyncWaitDataset(DatasetOp):
         self._pair = BlockReleasePair(num_batch, callback)
         if self._condition_name in self.input[0].get_sync_notifiers():
             raise RuntimeError("Condition name is already in use")
+        logger.warning("Please remember to add dataset.sync_update(condition=%s), otherwise will result in hanging",
+                       condition_name)
 
     def get_sync_notifiers(self):
         return {**self.input[0].get_sync_notifiers(), **{self._condition_name: self._pair.release_func}}