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https://issues.apache.org/jira/browse/FLINK-21821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kezhu Wang closed FLINK-21821.
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Resolution: Not A Problem
> Clean up Task/StreamTask cancellation and remove unnecessary concurrency
> -------------------------------------------------------------------------
>
> Key: FLINK-21821
> URL: https://issues.apache.org/jira/browse/FLINK-21821
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Network, Runtime / Task
> Affects Versions: 1.13.0
> Reporter: Kezhu Wang
> Priority: Major
>
> I think {{AbstractInvokable.cancel}} should only do flag things but not
> closing staff. Otherwise task canceler and task thread will contend on these
> closing tasks.
> It is same for {{BatchTask.cancel}} which might be confirmed as one potential
> cause for FLINK-21728.
> cc [~dwysakowicz] [~roman_khachatryan] [~pnowojski] [~AHeise]
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