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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