[jira] [Closed] (FLINK-25494) Duplicate element serializer during DefaultOperatorStateBackendSnapshotStrategy#syncPrepareResources

["Yun Tang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-25494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yun Tang closed FLINK-25494.
----------------------------
    Resolution: Invalid

> Duplicate element serializer during DefaultOperatorStateBackendSnapshotStrategy#syncPrepareResources
> ----------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-25494
>                 URL: https://issues.apache.org/jira/browse/FLINK-25494
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / State Backends
>            Reporter: Yun Tang
>            Assignee: Yun Tang
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.15.0, 1.13.6, 1.14.4
>
>
> Currently, during DefaultOperatorStateBackendSnapshotStrategy#syncPrepareResources, it will copy the array list serializer via PartitionableListState#deepCopy. However, it just initialize another ArrayListSerializer and not duplicate the internal state serializer:
>  
> See "{{{}internalListCopySerializer{}}}":
>  
> {code:java}
> private PartitionableListState(
>         RegisteredOperatorStateBackendMetaInfo<S> stateMetaInfo, ArrayList<S> internalList) {
>     this.stateMetaInfo = Preconditions.checkNotNull(stateMetaInfo);
>     this.internalList = Preconditions.checkNotNull(internalList);
>     this.internalListCopySerializer =
>             new ArrayListSerializer<>(stateMetaInfo.getPartitionStateSerializer());
> } {code}
>  
> This would cause unexpected problem with the usage of kryo serializer.



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