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From "Billie Rinaldi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-1922) Process group remains alive after container process is killed externally
Date Sat, 01 Nov 2014 18:14:34 GMT

     [ https://issues.apache.org/jira/browse/YARN-1922?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Billie Rinaldi updated YARN-1922:
---------------------------------
    Attachment: YARN-1922.4.patch

Updated patch.  We're worried about this causing problems for applications like Slider whose
containers create a bunch of child processes.  It would be great if we could get this fix
into 1.6.

> 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
>         Attachments: YARN-1922.1.patch, YARN-1922.2.patch, YARN-1922.3.patch, YARN-1922.4.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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