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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 Wed, 02 Aug 2017 00:14:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-65?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16110021#comment-16110021
] 

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

Thanks [~manirajv06@gmail.com], for the latest patch.
Few nits :
# environment,Commands, LocalResources,ServiceData : for all these fields it would be better
to get the reference and clear rather than creating a new object.
# Encapsulating these modifications into a method is better for readability and reuse in future
# Please add some test cases for the same.

> 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, YARN-65.003.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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