[GitHub] [spark] WeichenXu123 edited a comment on issue #25235: [WIP][SPARK-28483][Core] Fix canceling a spark job using barrier mode but barrier tasks do not exit

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WeichenXu123 edited a comment on issue #25235: [WIP][SPARK-28483][Core] Fix canceling a spark job using barrier mode but barrier tasks do not exit
URL: https://github.com/apache/spark/pull/25235#issuecomment-514520895
 
 
   The reason I do not use `thread.interrupt` to cancel the thread is:
   * In spark framework, when `Task.kill(interruptThread: Boolean, reason: String)` being called, the `interruptThread` flag is sometimes `false` which do not allow us to interrupt the task thread.
   * Even if we can interrupt the task thread, the scala `Future`(RPC requesting in `barrier()`) is running in a backgroud thread, we cannot get the backgroud thread handler so that still cannot interrupt it.
   

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