[jira] [Created] (SPARK-26886) Proper termination of external processes launched by the worker

["luzengxiang (JIRA)" <ji...@apache.org>]

luzengxiang created SPARK-26886:
-----------------------------------

             Summary: Proper termination of external processes launched by the worker
                 Key: SPARK-26886
                 URL: https://issues.apache.org/jira/browse/SPARK-26886
             Project: Spark
          Issue Type: New JIRA Project
          Components: Spark Core
    Affects Versions: 2.4.0
            Reporter: luzengxiang


When Embedding Deeplearning Framework in spark, spark worker has to launch external process(eg. MPI task) in some cases. 

 {quote}
val nothing = inputData.barrier().mapPartitions{ _ =>

      val barrierTask = BarrierTaskContext.get()

        //save data to disk

       barrierTask.barrier()

       //launch external process, eg MPI Task + TensorFlow
}
{quote}

This Jira is talk about properly terminating external processes launched by spark worker, when spark task is killed or interrupt.



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