Mikayla Konst created YARN-9106:
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             Summary: Add option to graceful decommission to not wait for 
applications
                 Key: YARN-9106
                 URL: https://issues.apache.org/jira/browse/YARN-9106
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: resourcemanager
            Reporter: Mikayla Konst


Add property 
yarn.resourcemanager.decommissioning-nodes-watcher.wait-for-applications.

If true (the default), the resource manager waits for all containers, as well 
as all applications associated with those containers, to finish before 
gracefully decommissioning a node.

If false, the resource manager only waits for containers, but not applications, 
to finish. For map-only jobs or other jobs in which mappers do not need to 
serve shuffle data, this allows nodes to be decommissioned as soon as their 
containers are finished as opposed to when the job is done.

Add property 
yarn.resourcemanager.decommissioning-nodes-watcher.wait-for-app-masters.

If false, during graceful decommission, when the resource manager waits for all 
containers on a node to finish, it will not wait for app master containers to 
finish. Defaults to true. This property should only be set to false if app 
master failure is recoverable.



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