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https://issues.apache.org/jira/browse/MAPREDUCE-4385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karthik Kambatla updated MAPREDUCE-4385:
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Attachment: MR-4385.patch
Added TestFairScheduler.testMaxTasksToAssign()
> 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, 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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