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