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From "Daniel Templeton (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-7397) Reduce lock contention in FairScheduler#getAppWeight()
Date Tue, 14 Nov 2017 06:46:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-7397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daniel Templeton updated YARN-7397:
-----------------------------------
    Fix Version/s: 3.0.0

> 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: 3.0.0, 3.1.0
>
>         Attachments: YARN-7397.001.patch, YARN-7397.branch-3.0.001.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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