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https://issues.apache.org/jira/browse/YARN-1922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14195478#comment-14195478
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Vinod Kumar Vavilapalli commented on YARN-1922:
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Thanks for the reviews, [~vvasudev]!

> Process group remains alive after container process is killed externally
> ------------------------------------------------------------------------
>
>                 Key: YARN-1922
>                 URL: https://issues.apache.org/jira/browse/YARN-1922
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.4.0
>         Environment: CentOS 6.4
>            Reporter: Billie Rinaldi
>            Assignee: Billie Rinaldi
>             Fix For: 2.6.0
>
>         Attachments: YARN-1922.1.patch, YARN-1922.2.patch, YARN-1922.3.patch, 
> YARN-1922.4.patch, YARN-1922.5.patch, YARN-1922.6.patch
>
>
> If the main container process is killed externally, ContainerLaunch does not 
> kill the rest of the process group.  Before sending the event that results in 
> the ContainerLaunch.containerCleanup method being called, ContainerLaunch 
> sets the "completed" flag to true.  Then when cleaning up, it doesn't try to 
> read the pid file if the completed flag is true.  If it read the pid file, it 
> would proceed to send the container a kill signal.  In the case of the 
> DefaultContainerExecutor, this would kill the process group.



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