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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3298) User-limit should be enforced in CapacityScheduler
Date Thu, 05 Mar 2015 22:51:38 GMT
Wangda Tan created YARN-3298:
--------------------------------

             Summary: User-limit should be enforced in CapacityScheduler
                 Key: YARN-3298
                 URL: https://issues.apache.org/jira/browse/YARN-3298
             Project: Hadoop YARN
          Issue Type: Bug
          Components: capacityscheduler, yarn
            Reporter: Wangda Tan
            Assignee: Wangda Tan


User-limit is not treat as a hard-limit for now, it will not consider required-resource (resource
of being-allocated resource request). And also, when user's used resource equals to user-limit,
it will still continue. This will generate jitter issues when we have YARN-2069 (preemption
policy kills a container under an user, and scheduler allocate a container under the same
user soon after).

The expected behavior should be as same as queue's capacity:
Only when user.usage + required <= user-limit, queue will continue to allocate container.



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