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https://issues.apache.org/jira/browse/FLINK-18760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17167666#comment-17167666
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Liu commented on FLINK-18760:
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Thanks for report this case, [~xintongsong]. I will fix it later.
> Redundant task managers should be released when there's no job running in
> session cluster
> -----------------------------------------------------------------------------------------
>
> Key: FLINK-18760
> URL: https://issues.apache.org/jira/browse/FLINK-18760
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.12.0
> Reporter: Xintong Song
> Assignee: Liu
> Priority: Major
> Fix For: 1.12.0
>
>
> In FLINK-18625, we introduced redundant task managers, as backup resources
> for speeding up job recovery in cases of task manager lost.
> For a session cluster, when there's no job running, it would be better to not
> keep such redundant resources. Currently, Flink session cluster will not
> request redundant task managers until a job is submitted, but it also will
> not release redundant task managers after all jobs terminated.
> This ticket proposes to check and release task managers if there are
> redundant task managers only.
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