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From "Alexey Tumanov (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (YARN-4198) CapacityScheduler locking / synchronization improvements
Date Wed, 16 Dec 2015 02:21:46 GMT

     [ https://issues.apache.org/jira/browse/YARN-4198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alexey Tumanov reassigned YARN-4198:
------------------------------------

    Assignee: Alexey Tumanov

> 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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