yaooqinn commented on PR #43746:
URL: https://github.com/apache/spark/pull/43746#issuecomment-1807458331

   > In this scenario, will the Spark App never fail as before?
   
   @LuciferYang. It depends, but I would never use the `never`. 
   
   -  Ratio>=1, the behavior is AS-IS
   -  Ratio<1, for this preempt scenario, it allows the app to survive if it 
has a sufficient number of resources, which changes depending on proactive DRA, 
passive eviction of resource managers, or runtime failures. 


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