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From "Ahmed Radwan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-73) nodemanager should cleanup running containers when it starts
Date Thu, 04 Oct 2012 17:39:47 GMT

    [ https://issues.apache.org/jira/browse/YARN-73?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13469538#comment-13469538
] 

Ahmed Radwan commented on YARN-73:
----------------------------------

The objective here is to only cover the cleanup during startup? If so, then this issue should
be a subtask of YARN-72, as it covers cleaning up containers before shutdown and also during
startup.
                
> nodemanager should cleanup running containers when it starts
> ------------------------------------------------------------
>
>                 Key: YARN-73
>                 URL: https://issues.apache.org/jira/browse/YARN-73
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 0.23.3
>            Reporter: Thomas Graves
>
> Currently the nodemanager doesn't cleanup running containers when it gets restarted.
This can cause containers to get lost and stick around forever. We've seen this happen multiple
times when the RM is restarted. When the RM is brought back up, it doesn't know about what
was running on the cluster, it tells the NMs to reboot and when the NM reboots it loses what
it had running. If there are any containers that are behaving badly there is no one left that
knows about them to kill them.
> We should kill any running containers when the nodemanager is being started.  Note that
when the NM is being brought up it needs to somehow figure out what containers were running
and be sure it doesn't kill anything it shouldn't.
> Note, we should also try to kill any running containers when the node manager is shutting
down (jira 4213 was filed for this).
> This might change a bit when RM restart is implemented if tasks can actually survive
across RM/NM being rebooted, but that can be addressed at that point.

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