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Posted to yarn-issues@hadoop.apache.org by "Szilard Nemeth (JIRA)" <ji...@apache.org> on 2018/11/04 22:51:00 UTC

[jira] [Assigned] (YARN-7583) Reduce overhead of container reacquisition

     [ https://issues.apache.org/jira/browse/YARN-7583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Szilard Nemeth reassigned YARN-7583:
------------------------------------

    Assignee: Szilard Nemeth

> Reduce overhead of container reacquisition
> ------------------------------------------
>
>                 Key: YARN-7583
>                 URL: https://issues.apache.org/jira/browse/YARN-7583
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>            Reporter: Jason Lowe
>            Assignee: Szilard Nemeth
>            Priority: Major
>
> When reacquiring containers after a nodemanager restart the Linux container executor invokes the container executor to essentially kill -0 the process to check if it is alive.  It would be a lot cheaper on Linux to stat the /proc/<pid> directory which the nodemanager can do directly rather than pay for the fork-and-exec through the container executor and potential signal permission issues.



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