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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4385) FairScheduler.maxTasksToAssign() should check for fairscheduler.assignmultiple.maps < TaskTracker.availableSlots
Date Thu, 28 Jun 2012 20:36:44 GMT
Karthik Kambatla created MAPREDUCE-4385:
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             Summary: 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


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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