Karthik Kambatla created YARN-5829:
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             Summary: FS preemption should reserve a node before considering 
containers on it for preemption
                 Key: YARN-5829
                 URL: https://issues.apache.org/jira/browse/YARN-5829
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: fairscheduler
            Reporter: Karthik Kambatla


FS preemption evaluates nodes for preemption, and subsequently preempts 
identified containers. If this node is not reserved for a specific application, 
any other application could be allocated resources on this node. 

Reserving the node for the starved application before preempting containers 
would help avoid this.



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