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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-65) Reduce RM app memory footprint once app has completed
Date Tue, 25 Apr 2017 17:55:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-65?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15983346#comment-15983346
] 

Naganarasimha G R commented on YARN-65:
---------------------------------------

Thanks for the clarification [~jlowe], may be i got confused because of your earlier comment
mentioning 
{code}
when an application completes, replace the RMAppImpl object with something like a RMCompletedAppImpl
that in turn has references to RMCompletedAppAttemptImpl rather than RMAppAttemptImpl. 
{code}

But anyway as we are in same page we can take this forward now.

> Reduce RM app memory footprint once app has completed
> -----------------------------------------------------
>
>                 Key: YARN-65
>                 URL: https://issues.apache.org/jira/browse/YARN-65
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 0.23.3
>            Reporter: Jason Lowe
>            Assignee: Naganarasimha G R
>
> The ResourceManager holds onto a configurable number of completed applications (yarn.resource.max-completed-applications,
defaults to 10000), and the memory footprint of these completed applications can be significant.
 For example, the {{submissionContext}} in RMAppImpl contains references to protocolbuffer
objects and other items that probably aren't necessary to keep around once the application
has completed.  We could significantly reduce the memory footprint of the RM by releasing
objects that are no longer necessary once an application completes.



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