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https://issues.apache.org/jira/browse/FLINK-2664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14743794#comment-14743794
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ASF GitHub Bot commented on FLINK-2664:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/1126
> Remove partitioned states when set to null
> ------------------------------------------
>
> Key: FLINK-2664
> URL: https://issues.apache.org/jira/browse/FLINK-2664
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Reporter: Gyula Fora
> Assignee: Gyula Fora
>
> Currently there is no way to remove a specific key from the partitioned state
> stored at streaming operators, which can cause unnecessary state accumulation.
> I suggest to remove the partitioned state for the current input when the
> state is set to null, and upon next retrieval simply return the default
> value. This allows the implementation of streaming programs that can garbage
> collect their own unwanted state.
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