[jira] [Created] (YARN-5128) Investigate potential race condition in the scheuduler nodeUpdate() method

["Ray Chiang (JIRA)" <ji...@apache.org>]

Ray Chiang created YARN-5128:
--------------------------------

             Summary: Investigate potential race condition in the scheuduler nodeUpdate() method
                 Key: YARN-5128
                 URL: https://issues.apache.org/jira/browse/YARN-5128
             Project: Hadoop YARN
          Issue Type: Task
            Reporter: Ray Chiang


This section of code exists in the various schedulers in the method nodeUpdate():

{code}
    // If the node is decommissioning, send an update to have the total
    // resource equal to the used resource, so no available resource to
    // schedule.
    // TODO: Fix possible race-condition when request comes in before
    // update is propagated
    if (nm.getState() == NodeState.DECOMMISSIONING) {
      this.rmContext
          .getDispatcher()
          .getEventHandler()
          .handle(
              new RMNodeResourceUpdateEvent(nm.getNodeID(), ResourceOption
                  .newInstance(getSchedulerNode(nm.getNodeID())
                      .getAllocatedResource(), 0)));
    }
{code}

Investigate the TODO section.



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