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Posted to dev@flink.apache.org by "Feifan Wang (Jira)" <ji...@apache.org> on 2023/08/05 08:56:00 UTC

[jira] [Created] (FLINK-32761) Use md5 sum of PhysicalStateHandleID as SharedStateRegistryKey ChangelogStateHandleStreamImpl

Feifan Wang created FLINK-32761:
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             Summary: Use md5 sum of PhysicalStateHandleID as SharedStateRegistryKey ChangelogStateHandleStreamImpl
                 Key: FLINK-32761
                 URL: https://issues.apache.org/jira/browse/FLINK-32761
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / State Backends
            Reporter: Feifan Wang


_ChangelogStateHandleStreamImpl#getKey()_ use _System.identityHashCode(stateHandle)_ as _SharedStateRegistryKey_ while stateHandle is not _FileStateHandle_ or {_}ByteStreamStateHandle{_}. That can easily lead to collision, although from the current code path, it only affects the test code.

In FLINK-29913 , we use md5 sum of PhysicalStateHandleID as SharedStateRegistryKey in IncrementalRemoteKeyedStateHandle, we can reuse this method in ChangelogStateHandleStreamImpl.



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