[jira] [Created] (FLINK-9269) Concurrency problem in HeapKeyedStateBackend when performing checkpoint async

["Sihua Zhou (JIRA)" <ji...@apache.org>]

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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