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https://issues.apache.org/jira/browse/YARN-7401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16242985#comment-16242985
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Daniel Templeton commented on YARN-7401:
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Now we're clean.  [~rkanter], wanna take a last look?

> Reduce lock contention in ClusterNodeTracker#getClusterCapacity()
> -----------------------------------------------------------------
>
>                 Key: YARN-7401
>                 URL: https://issues.apache.org/jira/browse/YARN-7401
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 3.1.0
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>         Attachments: YARN-7401.001.patch, YARN-7401.002.patch
>
>
> Profiling the code shows massive latency in 
> {{ClusterNodeTracker.getClusterCapacity()}} on getting the lock.



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