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https://issues.apache.org/jira/browse/YARN-38?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karthik Kambatla resolved YARN-38.
----------------------------------
    Resolution: Won't Fix

Now that we have work-preserving RM/NM restarts, rolling restarts/upgrades 
shouldn't require draining apps from the RM.

YARN-914 addresses draining jobs when a node is decommissioned.

> Add an option to drain the ResourceManager of all apps for upgrades
> -------------------------------------------------------------------
>
>                 Key: YARN-38
>                 URL: https://issues.apache.org/jira/browse/YARN-38
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Arun C Murthy
>            Assignee: Arun C Murthy
>
> MAPREDUCE-4575 for YARN.



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