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https://issues.apache.org/jira/browse/YARN-9714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16919204#comment-16919204
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Tao Yang commented on YARN-9714:
--------------------------------

Thanks [~rohithsharma], [~bibinchundatt] for the review and commit!

> ZooKeeper connection in ZKRMStateStore leaks after RM transitioned to standby
> -----------------------------------------------------------------------------
>
>                 Key: YARN-9714
>                 URL: https://issues.apache.org/jira/browse/YARN-9714
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Tao Yang
>            Assignee: Tao Yang
>            Priority: Major
>              Labels: memory-leak
>             Fix For: 3.3.0, 3.2.1
>
>         Attachments: YARN-9714.001.patch, YARN-9714.002.patch, 
> YARN-9714.003.patch, YARN-9714.004.patch, YARN-9714.005.patch
>
>
> Recently RM full GC happened in one of our clusters, after investigating the 
> dump memory and jstack, I found two places in RM may cause memory leaks after 
> RM transitioned to standby:
>  # Release cache cleanup timer in AbstractYarnScheduler never be canceled.
>  # ZooKeeper connection in ZKRMStateStore never be closed.
> To solve those leaks, we should close the connection or cancel the timer when 
> services are stopping.



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