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https://issues.apache.org/jira/browse/YARN-7351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16209661#comment-16209661
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Eric Yang commented on YARN-7351:
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[~jianhe] The patch reduces CPU usage, but increases memory consumption. The
thread spends more time on memory allocation, which can potentially trigger GC
pause. We might be able to throttle CPU usage by pausing for 50 milliseconds
if there is no incoming DNS request. The second patch illustrates the same
goal can be obtained without creating memory pressure.
> High CPU usage issue in RegistryDNS
> -----------------------------------
>
> Key: YARN-7351
> URL: https://issues.apache.org/jira/browse/YARN-7351
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Jian He
> Assignee: Jian He
> Attachments: YARN-7351.yarn-native-services.01.patch
>
>
> Thanks [~aw] for finding this issue.
> The current RegistryDNS implementation is always running on high CPU and
> pretty much eats one core.
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