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Posted to yarn-dev@hadoop.apache.org by "Carlo Curino (JIRA)" <ji...@apache.org> on 2014/04/17 23:47:14 UTC

[jira] [Created] (YARN-1957) ProportionalCapacitPreemptionPolicy handling of corner cases...

Carlo Curino created YARN-1957:
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             Summary: ProportionalCapacitPreemptionPolicy handling of corner cases...
                 Key: YARN-1957
                 URL: https://issues.apache.org/jira/browse/YARN-1957
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
            Reporter: Carlo Curino
            Assignee: Carlo Curino


The current version of ProportionalCapacityPreemptionPolicy should be improved to deal with the following two scenarios:
1) when rebalancing over-capacity allocations, it potentially preempts without considering the maxCapacity constraints of a queue (i.e., preempting possibly more than strictly necessary)
2) a zero capacity queue is preempted even if there is no demand (coherent with old use of zero-capacity to disabled queues)

The proposed patch fixes both issues, and introduce few new test cases.



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