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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5620) Core changes in NodeManager to support re-initialization of Containers with new launchContext
Date Tue, 13 Sep 2016 09:05:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-5620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15486721#comment-15486721

Jian He commented on YARN-5620:

[~asuresh], found a couple more issues while looking at the other patch:
- not sure if I missed something, Looks like the ReInitializationContext#resourceSet is never
initialized with the pending resources ?
- Also, the symlinks for the upgraded resources are not overridden correctly.
we probably need to change this to be a map of (symlink -> localizedPath) so that the same
symlink can be overwritten to point to the new resource.  If this involves a chain of caller
changes, it can be done separately. 
  private Map<Path, List<String>> localizedResources =
      new ConcurrentHashMap<>();

> Core changes in NodeManager to support re-initialization of Containers with new launchContext
> ---------------------------------------------------------------------------------------------
>                 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, YARN-5620.004.patch,
YARN-5620.005.patch, YARN-5620.006.patch, YARN-5620.007.patch, YARN-5620.008.patch, YARN-5620.009.patch,
YARN-5620.010.patch, YARN-5620.011.patch, YARN-5620.012.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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