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https://issues.apache.org/jira/browse/YARN-7207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16183314#comment-16183314
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Yufei Gu commented on YARN-7207:
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File YARN-7263 for #2.
> Cache the local host name when getting application list in RM
> -------------------------------------------------------------
>
> Key: YARN-7207
> URL: https://issues.apache.org/jira/browse/YARN-7207
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: RM
> Affects Versions: 3.1.0
> Reporter: Yufei Gu
> Assignee: Yufei Gu
> Attachments: YARN-7207.001.patch, YARN-7207.002.patch
>
>
> {{getLocalHostName()}} is invoked for generating the report for each
> application, which means it is called 1000 times for each
> {{getApplications()}} if there are 1000 apps in RM. Some user got a
> performance issue when {{getLocalHostName()}} is slow under some network envs.
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