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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-4385) FairScheduler.maxTasksToAssign() should check for fairscheduler.assignmultiple.maps < TaskTracker.availableSlots
Date Fri, 29 Jun 2012 20:49:45 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Karthik Kambatla updated MAPREDUCE-4385:
----------------------------------------

    Status: Patch Available  (was: Open)
    
> FairScheduler.maxTasksToAssign() should check for fairscheduler.assignmultiple.maps <
TaskTracker.availableSlots
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4385
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4385
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 1.0.3
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: MR-4385.patch
>
>
> FairScheduler.maxTasksToAssign() can potentially return a value greater than the available
slots. Currently, we rely on canAssignMaps()/canAssignReduces() to reject such requests.
> These additional calls can be avoided by check against the available slots in maxTasksToAssign().

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