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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-41) The RM should handle the graceful shutdown of the NM.
Date Wed, 13 May 2015 14:58:01 GMT

    [ https://issues.apache.org/jira/browse/YARN-41?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14542045#comment-14542045
] 

Junping Du commented on YARN-41:
--------------------------------

Thanks [~jlowe] for sharing this prospective. I think YARN-3212 is facing the same situation
as your last comment there. 
However, in this case, we may make things simpler if we don't care if running applications
on work preserving enabled nodes. We just simply don't do unRegister NM from RM when work-preserving
is enabled - this is not only simpler for implementation, but also simpler for user to understand
- or it will make shutdown NM daemon's behavior sounds more randomly as sometimes it get disappeared
from RM while sometimes not - this sounds the behavior is not controlled by configuration
but controlled by randomly container allocation. Thoughts?

> 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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