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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2015/03/10 04:12:39 UTC

[jira] [Updated] (MAPREDUCE-2266) JvmManager sleeps between SIGTERM and SIGKILL while holding many TT locks

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer updated MAPREDUCE-2266:
----------------------------------------
    Fix Version/s:     (was: 0.22.1)

> JvmManager sleeps between SIGTERM and SIGKILL while holding many TT locks
> -------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2266
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2266
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: task-controller, tasktracker
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>
> Between sending a task SIGTERM and SIGKILL, the JvmManager will sleep for sleepTimeBeforeSigKill millis. But in many call heirarchies this is done while holding important locks like the TT lock and the JvmManagerForType lock. With the default 5 second sleep, this prevents other tasks from getting scheduled and reduces scheduling throughput.



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