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Posted to mapreduce-dev@hadoop.apache.org by "Scott Chen (JIRA)" <ji...@apache.org> on 2010/05/06 04:06:47 UTC

[jira] Created: (MAPREDUCE-1756) FairScheduler may assign tasks over the TaskTracker limit

FairScheduler may assign tasks over the TaskTracker limit
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                 Key: MAPREDUCE-1756
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1756
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/fair-share
    Affects Versions: 0.22.0
            Reporter: Scott Chen
            Assignee: Scott Chen
             Fix For: 0.22.0


FairScheduler may assign tasks over the TaskTracker limit.
The over assigned task will wait on the TaskTracker in the state of UNASSIGNED causing a higher latency.

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[jira] Resolved: (MAPREDUCE-1756) FairScheduler may assign tasks over the TaskTracker limit

Posted by "Scott Chen (JIRA)" <ji...@apache.org>.

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Scott Chen resolved MAPREDUCE-1756.
-----------------------------------

    Resolution: Invalid

Sorry, I made a mistake.
CapBasedLoadManager.canAssign{Map,Reduce}() will prevent this from happening.
The problem is not valid.

> FairScheduler may assign tasks over the TaskTracker limit
> ---------------------------------------------------------
>
>                 Key: MAPREDUCE-1756
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1756
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: contrib/fair-share
>    Affects Versions: 0.22.0
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>             Fix For: 0.22.0
>
>
> FairScheduler may assign tasks over the TaskTracker limit.
> The over assigned task will wait on the TaskTracker in the state of UNASSIGNED causing a higher latency.

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