Weiwei Yang created YARN-8127:

             Summary: Resource leak when async scheduling is enabled
                 Key: YARN-8127
                 URL: https://issues.apache.org/jira/browse/YARN-8127
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Weiwei Yang

Brief steps to reproduce
 # Enable async scheduling, 5 threads
 # Submit a lot of jobs trying to exhaust cluster resource
 # After a while, observed NM allocatedĀ resourceĀ is more than resource 
requested by allocated containers

Looks like the commit phase is not sync handling reserved containers, causing 
some proposal incorrectly accepted, subsequently resource was deducted multiple 
times for a container.

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