Github user jerryshao commented on the pull request: https://github.com/apache/spark/pull/7786#issuecomment-163069474 @steveloughran , by default Yarn will preempt the container 15 seconds after the warning. Yarn RM gives the warning to AM depends on the cluster usage at that time, it will be changed time to time, once the preemption list is changed, this executor could be rescheduled again. Also it could not be said that this preempted container will definitely be reclaimed by Yarn, Yarn will change the decision time to time, so using the old decision to release the containers may not be a good idea.
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