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https://issues.apache.org/jira/browse/YARN-41?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14542139#comment-14542139
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Junping Du commented on YARN-41:
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bq. I think avoiding the unregister during shutdown if the NM is under
supervision (i.e.: we know it will be restarted momentarily) is fine.
How about the case when NM is under supervision while work preserving is
disabled? Sorry for forgetting to bring this out in YARN-2331, but this sounds
like should be the same behavior with node with disabling work preserving and
not in supervision (at least for feature of NM restart work preserving). So we
should check two configurations together, only skip unregister in case both
configuration are true. Isn't it?
> The RM should handle the graceful shutdown of the NM.
> -----------------------------------------------------
>
> Key: YARN-41
> URL: https://issues.apache.org/jira/browse/YARN-41
> Project: Hadoop YARN
> Issue Type: New Feature
> Components: nodemanager, resourcemanager
> Reporter: Ravi Teja Ch N V
> Assignee: Devaraj K
> Labels: BB2015-05-TBR
> Attachments: MAPREDUCE-3494.1.patch, MAPREDUCE-3494.2.patch,
> MAPREDUCE-3494.patch, YARN-41-1.patch, YARN-41-2.patch, YARN-41-3.patch,
> YARN-41-4.patch, YARN-41.patch
>
>
> Instead of waiting for the NM expiry, RM should remove and handle the NM,
> which is shutdown gracefully.
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