[
https://issues.apache.org/jira/browse/YARN-41?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14548130#comment-14548130
]
Jason Lowe commented on YARN-41:
--------------------------------
Looking at the table above, I'm wondering about the case where we are doing a
graceful shutdown, recovery is enabled, but we are not running under
supervision. When we are shutting down without supervision the NM will
normally kill active containers, so in that sense I think we should also
unregister. I'm not sure there's a point to avoiding the unregister if no
containers will survive the NM shutdown. The NM only avoids killing containers
on shutdown if the NM supports recovery and it has been told it is being
supervised (i.e.: it is likely the NM will be restarted shortly after the
shutdown completes). In the other cases it kills containers on shutdown to
avoid a situation where containers are running uncontrolled on a node due to
the NM being unavailable for a prolonged duration.
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
