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https://issues.apache.org/jira/browse/FLINK-15938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu resolved FLINK-15938.
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Resolution: Fixed
Fixed in 1.9.3: f5a658981bd86abeec6750fcf1e19a43a561fc5f
> Idle state not cleaned in StreamingJoinOperator and
> StreamingSemiAntiJoinOperator
> ---------------------------------------------------------------------------------
>
> Key: FLINK-15938
> URL: https://issues.apache.org/jira/browse/FLINK-15938
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Planner
> Affects Versions: 1.9.2
> Reporter: Benchao Li
> Assignee: Benchao Li
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.9.3
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> {code:java}
> return StateTtlConfig
> .newBuilder(Time.milliseconds(retentionTime))
> .setUpdateType(StateTtlConfig.UpdateType.OnCreateAndWrite)
>
> .setStateVisibility(StateTtlConfig.StateVisibility.ReturnExpiredIfNotCleanedUp)
> .build();
> {code}
> StateTtl is constructed in above code for `StreamingJoinOperator` and
> `StreamingSemiAntiJoinOperator`.
> However, as stated in
> [https://ci.apache.org/projects/flink/flink-docs-master/dev/stream/state/state.html#cleanup-of-expired-state]
> , the state will be cleaned only when it's read which means the state will
> not be cleaned enless we read it.
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