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From "Nathan Roberts (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (MAPREDUCE-6697) Concurrent task limits should only be applied when necessary
Date Mon, 16 May 2016 20:00:14 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6697?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nathan Roberts reassigned MAPREDUCE-6697:
-----------------------------------------

    Assignee: Nathan Roberts

> Concurrent task limits should only be applied when necessary
> ------------------------------------------------------------
>
>                 Key: MAPREDUCE-6697
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6697
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.7.0
>            Reporter: Jason Lowe
>            Assignee: Nathan Roberts
>
> The concurrent task limit feature should only adjust the ANY portion of the AM heartbeat
ask when a limit is truly necessary, otherwise extraneous containers could be allocated by
the RM to the AM adding some overhead to both.  Specifying a concurrent task limit that is
beyond the total number of tasks in the job should be the same as asking for no limit.



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