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From "Xianyin Xin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4198) CapacityScheduler locking / synchronization improvements
Date Wed, 16 Dec 2015 09:17:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059730#comment-15059730

Xianyin Xin commented on YARN-4198:

Hi [~curino], does this improvement only considers the locking / synchronization that has
relation with ReservationSystem? What's the relationship of this jira with YARN-3091 and the

> CapacityScheduler locking / synchronization improvements
> --------------------------------------------------------
>                 Key: YARN-4198
>                 URL: https://issues.apache.org/jira/browse/YARN-4198
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Carlo Curino
>            Assignee: Alexey Tumanov
> In the context of YARN-4193 (which stresses the RM/CS performance) we found several performance
problems with  in the locking/synchronization of the CapacityScheduler, as well as inconsistencies
that do not normally surface (incorrect locking-order of queues protected by CS locks etc).
This JIRA proposes several refactoring that improve this.

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