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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-3487) CapacityScheduler scheduler lock obtained unnecessarily when calling getQueue
Date Wed, 05 Aug 2015 17:46:05 GMT

     [ https://issues.apache.org/jira/browse/YARN-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wangda Tan updated YARN-3487:
-----------------------------
    Labels:   (was: 2.6.1-candidate)

> CapacityScheduler scheduler lock obtained unnecessarily when calling getQueue
> -----------------------------------------------------------------------------
>
>                 Key: YARN-3487
>                 URL: https://issues.apache.org/jira/browse/YARN-3487
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Critical
>             Fix For: 2.7.1
>
>         Attachments: YARN-3487.001.patch, YARN-3487.002.patch, YARN-3487.003.patch
>
>
> Recently saw a significant slowdown of applications on a large cluster, and we noticed
there were a large number of blocked threads on the RM.  Most of the blocked threads were
waiting for the CapacityScheduler lock while calling getQueueInfo.



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