Sihua Zhou created FLINK-9269:
---------------------------------
Summary: Concurrency problem in HeapKeyedStateBackend when
performing checkpoint async
Key: FLINK-9269
URL: https://issues.apache.org/jira/browse/FLINK-9269
Project: Flink
Issue Type: Bug
Components: State Backends, Checkpointing
Affects Versions: 1.5.0
Reporter: Sihua Zhou
Fix For: 1.5.0
{code:java}
@Nonnull
@Override
protected
SnapshotResult<KeyedStateHandle> performOperation() throws Exception {
long startTime =
System.currentTimeMillis();
CheckpointStreamFactory.CheckpointStateOutputStream localStream =
this.streamAndResultExtractor.getCheckpointOutputStream();
DataOutputViewStreamWrapper
outView = new DataOutputViewStreamWrapper(localStream);
serializationProxy.write(outView);
long[] keyGroupRangeOffsets =
new long[keyGroupRange.getNumberOfKeyGroups()];
for (int keyGroupPos = 0;
keyGroupPos < keyGroupRange.getNumberOfKeyGroups(); ++keyGroupPos) {
int keyGroupId =
keyGroupRange.getKeyGroupId(keyGroupPos);
keyGroupRangeOffsets[keyGroupPos] = localStream.getPos();
outView.writeInt(keyGroupId);
for (Map.Entry<String,
StateTable<K, ?, ?>> kvState : stateTables.entrySet()) {
try
(OutputStream kgCompressionOut =
keyGroupCompressionDecorator.decorateWithCompression(localStream)) {
DataOutputViewStreamWrapper kgCompressionView = new
DataOutputViewStreamWrapper(kgCompressionOut);
kgCompressionView.writeShort(kVStateToId.get(kvState.getKey()));
cowStateStableSnapshots.get(kvState.getValue()).writeMappingsInKeyGroup(kgCompressionView,
keyGroupId);
} // this will
just close the outer compression stream
}
}
if
(cancelStreamRegistry.unregisterCloseable(streamAndResultExtractor)) {
KeyGroupRangeOffsets
kgOffs = new KeyGroupRangeOffsets(keyGroupRange, keyGroupRangeOffsets);
SnapshotResult<StreamStateHandle> result =
streamAndResultExtractor.closeAndFinalizeCheckpointStreamResult();
streamAndResultExtractor = null;
logOperationCompleted(primaryStreamFactory, startTime);
return
CheckpointStreamWithResultProvider.toKeyedStateHandleSnapshotResult(result,
kgOffs);
}
return SnapshotResult.empty();
}
{code}
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