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https://issues.apache.org/jira/browse/YARN-3223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14329275#comment-14329275
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Junping Du commented on YARN-3223:
----------------------------------

Hi [~varun_saxena], I am glad if you can work on this JIRA. :) My 
recommendation here just you can check some sub-tasks under YARN-291 which is 
related to the work here.

> Resource update during NM graceful decommission
> -----------------------------------------------
>
>                 Key: YARN-3223
>                 URL: https://issues.apache.org/jira/browse/YARN-3223
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Junping Du
>            Assignee: Varun Saxena
>
> During NM graceful decommission, we should handle resource update properly, 
> include: make RMNode keep track of old resource for possible rollback, keep 
> available resource to 0 and used resource get updated when
> container finished.



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