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https://issues.apache.org/jira/browse/SPARK-25265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16596221#comment-16596221
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Marco Gaido commented on SPARK-25265:
-------------------------------------
Isn't this a duplicate of the next one?
> Fix memory leak vulnerability in Barrier Execution Mode
> -------------------------------------------------------
>
> Key: SPARK-25265
> URL: https://issues.apache.org/jira/browse/SPARK-25265
> Project: Spark
> Issue Type: Bug
> Components: Scheduler, Spark Core
> Affects Versions: 2.4.0
> Reporter: Kousuke Saruta
> Assignee: Kousuke Saruta
> Priority: Critical
>
> BarrierCoordinator$ uses Timer and TimerTask. `TimerTask#cancel()` is invoked
> in ContextBarrierState#cancelTimerTask but `Timer#purge()` is never invoked.
> Once a TimerTask is scheduled, the reference to it is not released until
> `Timer#purge()` is invoked even though `TimerTask#cancel()` is invoked.
>
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