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From "Manikandan R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-65) Reduce RM app memory footprint once app has completed
Date Mon, 31 Jul 2017 05:28:01 GMT

    [ https://issues.apache.org/jira/browse/YARN-65?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16106817#comment-16106817
] 

Manikandan R commented on YARN-65:
----------------------------------

Thanks [~naganarasimha_gr@apache.org] for review and suggestions.

1, 2:  Yes, this explains the test cases failures mentioned in my previous comment. At that
time, I thought it was not because of AddApplicationToSchedulerTransition class. Now, got
an understanding about this flow.

3: Taken care.

Attached patch for review.

> 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: Manikandan R
>         Attachments: YARN-65.001.patch, YARN-65.002.patch
>
>
> 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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