Saisai Shao created SPARK-9468:
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             Summary: Avoid scheduling tasks on preemption executors
                 Key: SPARK-9468
                 URL: https://issues.apache.org/jira/browse/SPARK-9468
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core, YARN
            Reporter: Saisai Shao
            Priority: Minor


Currently Spark SchedulerBackend has no mechanism to be notified of preemption 
of executors by cluster manager, this will make SchedulerBackend keep 
scheduling tasks on the to-be-preempted executors and finally be failed. Also 
this cumulative failure will possibly lead to job failure.

So Spark SchedulerBackend should be notified and avoid scheduling tasks on 
preemption nodes to avoid unnecessary failure. 



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