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https://issues.apache.org/jira/browse/YARN-7401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16242521#comment-16242521
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Daniel Templeton commented on YARN-7401:
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And that's a slightly different but still unrelated set of test failures.
Kicking Jenkins one more time.
> 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
>
>
> Profiling the code shows massive latency in
> {{ClusterNodeTracker.getClusterCapacity()}} on getting the lock.
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