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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5620) Core changes in NodeManager to support for upgrade and rollback of Containers
Date Wed, 07 Sep 2016 22:28:22 GMT

    [ https://issues.apache.org/jira/browse/YARN-5620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15471981#comment-15471981
] 

Wangda Tan commented on YARN-5620:
----------------------------------

[~asuresh],

In YARN-5221 we have merged update container resource and execution type. I think it's better
to merge the API in NM side as well. We have updated NM for container resizing in YARN-1643/YARN-1449,
and there's on pending ticket for updating cgroups: YARN-4166.

I would suggest to have:
- A unified API in AM-NM protocol to update container
- A unified implementation inside to update container manager / CGroups. 

To avoid making API/Implementation fragmented.

Thoughts?

> Core changes in NodeManager to support for upgrade and rollback of Containers
> -----------------------------------------------------------------------------
>
>                 Key: YARN-5620
>                 URL: https://issues.apache.org/jira/browse/YARN-5620
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>         Attachments: YARN-5620.001.patch, YARN-5620.002.patch, YARN-5620.003.patch
>
>
> JIRA proposes to modify the ContainerManager (and other core classes) to support upgrade
of a running container with a new {{ContainerLaunchContext}} as well as the ability to rollback
the upgrade if the container is not able to restart using the new launch Context. 



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