wangzhongwei created YARN-11560:
-----------------------------------

             Summary: fix NPE bug when multi-node enabled with schedule 
asynchronously
                 Key: YARN-11560
                 URL: https://issues.apache.org/jira/browse/YARN-11560
             Project: Hadoop YARN
          Issue Type: Bug
          Components: capacity scheduler, capacityscheduler
    Affects Versions: 3.3.3
            Reporter: wangzhongwei


NPE exception may happend when commit thread calling  
allocateFromReservedContainer with param reservedContainer ,while the container 
may be unreserved by the judgment thread in tryCommit->apply  function 



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