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https://issues.apache.org/jira/browse/YARN-1367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14045311#comment-14045311
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Jian He commented on YARN-1367:
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agree, given the flag will be got rid of in the future, it's better to just use 
the flag now than adding a new field.

> After restart NM should resync with the RM without killing containers
> ---------------------------------------------------------------------
>
>                 Key: YARN-1367
>                 URL: https://issues.apache.org/jira/browse/YARN-1367
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Bikas Saha
>            Assignee: Anubhav Dhoot
>         Attachments: YARN-1367.001.patch, YARN-1367.002.patch, 
> YARN-1367.prototype.patch
>
>
> After RM restart, the RM sends a resync response to NMs that heartbeat to it. 
>  Upon receiving the resync response, the NM kills all containers and 
> re-registers with the RM. The NM should be changed to not kill the container 
> and instead inform the RM about all currently running containers including 
> their allocations etc. After the re-register, the NM should send all pending 
> container completions to the RM as usual.



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