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https://issues.apache.org/jira/browse/YARN-7397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16223635#comment-16223635
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Hudson commented on YARN-7397:
------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #13156 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/13156/])
YARN-7397. Reduce lock contention in FairScheduler#getAppWeight() (templedf:
rev e62bbbca7adafa0e050212e99c41c95a844700ff)
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FairScheduler.java
> Reduce lock contention in FairScheduler#getAppWeight()
> ------------------------------------------------------
>
> Key: YARN-7397
> URL: https://issues.apache.org/jira/browse/YARN-7397
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Affects Versions: 3.1.0
> Reporter: Daniel Templeton
> Assignee: Daniel Templeton
> Fix For: 3.1.0
>
> Attachments: YARN-7397.001.patch
>
>
> In profiling the fair scheduler, a large amount of time is spent waiting to
> get the lock in {{FairScheduler.getAppWeight()}}, when the lock isn't
> actually needed. This patch reduces the scope of the lock to eliminate that
> contention.
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