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https://issues.apache.org/jira/browse/YARN-10279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17145042#comment-17145042
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Hudson commented on YARN-10279:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #18379 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/18379/])
YARN-10279. Avoid unnecessary QueueMappingEntity creations. Contributed
(snemeth: rev 6a8fd73b273629d0c7c071cf4d090f67d9b96fe4)
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/placement/UserGroupMappingPlacementRule.java
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/placement/QueuePlacementRuleUtils.java
> 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
> Fix For: 3.4.0, 3.3.1
>
> 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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