Xuan Gong created YARN-3245:

             Summary: Find a way to reserve AMContainer resource to launch 
clean-up container in CapacityScheduler
                 Key: YARN-3245
                 URL: https://issues.apache.org/jira/browse/YARN-3245
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: resourcemanager
            Reporter: Xuan Gong
            Assignee: Xuan Gong

The clean-up container will be launched after the application is 
finished/killed/failed. Cleanup container may not get resources if we negotiate 
the resource for it separately because cluster may have gotten busy after the 
final AM exit. 

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