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https://issues.apache.org/jira/browse/YARN-10279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17142690#comment-17142690
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Adam Antal commented on YARN-10279:
-----------------------------------
Thanks for the patch [~mhudaky]. The unit test failures seem unrelated, so I
give a +1 to this patch.
> Avoid unnecessary QueueMappingEntity creations
> ----------------------------------------------
>
> Key: YARN-10279
> URL: https://issues.apache.org/jira/browse/YARN-10279
> Project: Hadoop YARN
> Issue Type: Task
> Reporter: Gergely Pollak
> Assignee: Hudáky Márton Gyula
> Priority: Minor
> Attachments: YARN-10279.001.patch, YARN-10279.003.patch,
> YARN-10279.004.patch, YARN-10279.005.patch, YARN-10279.006.patch
>
>
> In CS UserGroupMappingPlacementRule and AppNameMappingPlacementRule classes
> we create new instances of QueueMappingEntity class. In some cases we simply
> copy the already received class, so we just duplicate it, which is
> unnecessary since the class is immutable.
> This is just a minor improvement, probably doesn't have much impact, but
> still puts some unnecessary load on GC.
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