[jira] [Created] (YARN-5342) Improve non-exclusive node partition resource allocation in Capacity Scheduler

["Wangda Tan (JIRA)" <ji...@apache.org>]

Wangda Tan created YARN-5342:
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             Summary: Improve non-exclusive node partition resource allocation in Capacity Scheduler
                 Key: YARN-5342
                 URL: https://issues.apache.org/jira/browse/YARN-5342
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Wangda Tan
            Assignee: Wangda Tan


In the previous implementation, one non-exclusive container allocation is possible when the missed-opportunity >= #cluster-nodes. And missed-opportunity will be reset when container allocated to any node.

This will slow down the frequency of container allocation on non-exclusive node partition: *When a non-exclusive partition=x has idle resource, we can only allocate one container for this app in every X=nodemanagers.heartbeat-interval secs for the whole cluster.*

In this JIRA, I propose a fix to reset missed-opporunity only if we have >0 pending resource for the non-exclusive partition OR we get allocation from the default partition.



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