Wangda Tan created YARN-2920:

             Summary: CapacityScheduler should be notified when labels on nodes 
                 Key: YARN-2920
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Wangda Tan
            Assignee: Wangda Tan

Currently, labels on nodes changes will only be handled by RMNodeLabelsManager, 
but that is not enough upon labels on nodes changes:
- Scheduler should be able to do take actions to running containers. (Like 
- Used / available capacity in scheduler should be updated for future planning.

We need add a new event to pass such updates to scheduler

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