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https://issues.apache.org/jira/browse/FLINK-8699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sihua Zhou closed FLINK-8699.
-----------------------------
      Resolution: Fixed
    Release Note: Richter has fixed this in his hotfix.

> 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
>            Priority: Blocker
>             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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