VADAGA ANANYO RAO created YARN-10591:
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             Summary: Allow USERLIMIT_FIRST as only valid configuration when 
FairOrdering is used
                 Key: YARN-10591
                 URL: https://issues.apache.org/jira/browse/YARN-10591
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: capacity scheduler
            Reporter: VADAGA ANANYO RAO
            Assignee: VADAGA ANANYO RAO


When FairOrderingPolicy is being used in CapacityScheduler, we should only 
allow for USERLIMIT_FIRST.

The alternate option to USERLIMIT_FIRST is PRIORITY_FIRST. However, application 
priorities create anti-patterns with fairness. So we should not allow for 
PRIORITY_FIRST to be set.

This Jira is to add validation check to ensure only USERLIMIT_FIRST is set if 
FairOrderingPolicy is being used.

cc: [~sunilg] [~leftnoteasy] [~epayne]

 



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