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Posted to mapreduce-dev@hadoop.apache.org by "Arun C Murthy (Resolved) (JIRA)" <ji...@apache.org> on 2012/01/06 06:33:40 UTC

[jira] [Resolved] (MAPREDUCE-3631) Corner case in headroom calculation

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy resolved MAPREDUCE-3631.
--------------------------------------

    Resolution: Duplicate

Fixed via MAPREDUCE-3126.
                
> Corner case in headroom calculation
> -----------------------------------
>
>                 Key: MAPREDUCE-3631
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3631
>             Project: Hadoop Map/Reduce
>          Issue Type: Task
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Amol Kekre
>             Fix For: 0.23.1
>
>
> When there is a single queue and a large job fills up the whole cluster, a lost NM can lead to wrong headroom when all
> slots are taken up by reduces since at that point headroom isn't recomputed.

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