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https://issues.apache.org/jira/browse/YARN-6681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16071180#comment-16071180
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Hudson commented on YARN-6681:
------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11960 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/11960/])
YARN-6681. Eliminate double-copy of child queues in (naganarasimha_gr: rev
fa1aaee87b0141a0255b5f8e5fd8e8f49d7efe86)
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/ParentQueue.java
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/AbstractCSQueue.java
> Eliminate double-copy of child queues in canAssignToThisQueue
> -------------------------------------------------------------
>
> Key: YARN-6681
> URL: https://issues.apache.org/jira/browse/YARN-6681
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Affects Versions: 2.8.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Fix For: 2.9.0, 3.0.0-beta1, 2.8.2
>
> Attachments: YARN-6681.2.branch-2.8.patch,
> YARN-6681.2.branch-2.patch, YARN-6681.2.trunk.patch,
> YARN-6681.branch-2.8.patch, YARN-6681.branch-2.patch, YARN-6681.trunk.patch
>
>
> 20% of the time in {{AbstractCSQueue#canAssignToThisQueue}} is spent
> performing two duplications a treemap of child queues into a list - once to
> test for null, second to see if it's empty. Eliminating the dups reduces the
> overhead to 2%.
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