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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1030) Reduce tasks are getting starved in capacity scheduler
Date Fri, 25 Sep 2009 16:24:16 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759608#action_12759608
] 

Arun C Murthy commented on MAPREDUCE-1030:
------------------------------------------

Nit: With this change CapacityTaskScheduler.assignTasks returns an empty List when assignMultipleTasks
is true and cannot find any task (map or reduce) to schedule... however, it returns null if
assignMultipleTasks is false and cannot find a map or reduce to schedule. 

> Reduce tasks are getting starved in capacity scheduler
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-1030
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1030
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: contrib/capacity-sched
>    Affects Versions: 0.21.0
>            Reporter: rahul k singh
>            Assignee: rahul k singh
>            Priority: Blocker
>             Fix For: 0.21.0
>
>         Attachments: MAPREDUCE-1030-1.patch, MAPREDUCE-1030-2.patch.txt
>
>
> reduce tasks are getting starved in capacity scheduler. 

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