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https://issues.apache.org/jira/browse/YARN-3139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15513717#comment-15513717
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Daniel Templeton commented on YARN-3139:
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Yep.  I added it to my todo list, but I won't get there until next week.

> Improve locks in AbstractYarnScheduler/CapacityScheduler/FairScheduler
> ----------------------------------------------------------------------
>
>                 Key: YARN-3139
>                 URL: https://issues.apache.org/jira/browse/YARN-3139
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager, scheduler
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>         Attachments: YARN-3139.0.patch, YARN-3139.1.patch, YARN-3139.2.patch
>
>
> Enhance locks in AbstractYarnScheduler/CapacityScheduler/FairScheduler, as 
> mentioned in YARN-3091, a possible solution is using read/write lock. Other 
> fine-graind locks for specific purposes / bugs should be addressed in 
> separated tickets.



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