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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4599) Set OOM control for memory cgroups
Date Wed, 01 Mar 2017 01:53:45 GMT

    [ https://issues.apache.org/jira/browse/YARN-4599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15889309#comment-15889309
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Miklos Szegedi commented on YARN-4599:
--------------------------------------

Thank you for the patch [~sandflee]. This would be useful for many users.
I have a few questions.
1. CGroupsElasticMemoryResourceHandlerImpl copies lots of code from CGroupsMemoryResourceHandlerImpl.
Have you considered inheritance to reduce redundancy?
2. Is it better to use JNI as in the current patch, or implement the event logic in Linux
Container Executor?
3. Could you please rebase it? It does not build anymore.

> Set OOM control for memory cgroups
> ----------------------------------
>
>                 Key: YARN-4599
>                 URL: https://issues.apache.org/jira/browse/YARN-4599
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.9.0
>            Reporter: Karthik Kambatla
>            Assignee: sandflee
>              Labels: oct16-medium
>         Attachments: yarn-4599-not-so-useful.patch, YARN-4599.sandflee.patch
>
>
> YARN-1856 adds memory cgroups enforcing support. We should also explicitly set OOM control
so that containers are not killed as soon as they go over their usage. Today, one could set
the swappiness to control this, but clusters with swap turned off exist.



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