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Posted to issues@flink.apache.org by "Sihua Zhou (JIRA)" <ji...@apache.org> on 2018/02/19 12:20:00 UTC

[jira] [Created] (FLINK-8699) Fix concurrency problem in rocksdb full checkpoint

Sihua Zhou created FLINK-8699:
---------------------------------

             Summary: Fix concurrency problem in rocksdb full checkpoint
                 Key: FLINK-8699
                 URL: https://issues.apache.org/jira/browse/FLINK-8699
             Project: Flink
          Issue Type: Bug
          Components: State Backends, Checkpointing
    Affects Versions: 1.5.0
            Reporter: Sihua Zhou
            Assignee: Sihua Zhou
             Fix For: 1.5.0


In full checkpoint, `kvStateInformation` is not a copied object and it can be changed when writeKVStateMetaData() is invoking ... This can lead to problematic, which is serious.
{code}
private void writeKVStateMetaData() throws IOException {
  // ...
        for (Map.Entry<String, Tuple2<ColumnFamilyHandle, RegisteredKeyedBackendStateMetaInfo<?, ?>>> column :
				stateBackend.kvStateInformation.entrySet()) {
        }
  //...
}
{code}



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