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From "Jun Gong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4382) Container hierarchy in cgroup may remain for ever after the container have be terminated
Date Fri, 27 Nov 2015 09:31:11 GMT

    [ https://issues.apache.org/jira/browse/YARN-4382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15029670#comment-15029670
] 

Jun Gong commented on YARN-4382:
--------------------------------

Sorry for late reply. I am working on it, will attach a patch later.

> Container hierarchy in cgroup may remain for ever after the container have be terminated
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-4382
>                 URL: https://issues.apache.org/jira/browse/YARN-4382
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.5.2
>            Reporter: lachisis
>            Assignee: Jun Gong
>
> If we use LinuxContainerExecutor to executor the containers, this question may happens.
> In the common case, when a container run, a corresponding hierarchy will be created in
cgroup dir. And when the container terminate, the hierarchy  will be delete in some seconds(this
time can be configured by yarn.nodemanager.linux-container-executor.cgroups.delete-delay-ms).
> In the code, I find that, CgroupsLCEResource send a signal to kill container process
asynchronously, and in the same time, it will try to delete the container hierarchy  in configured
"delete-delay-ms" times. 
> But if the container process be killed for seconds which large than "delete-delay-ms"
time, the  container hierarchy  will remain for ever.
>   



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