[GitHub] [spark] bsidhom opened a new pull request #24462: [SPARK-26268][CORE] Do not resubmit tasks when executors are lost

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bsidhom opened a new pull request #24462: [SPARK-26268][CORE] Do not resubmit tasks when executors are lost
URL: https://github.com/apache/spark/pull/24462
 
 
   The DAGScheduler assumes that shuffle data is lost if an executor is lost and the Spark external shuffle service is not enabled. However, external shuffle managers other than the default external shuffle service can store shuffle data outside of the Spark cluster itself. In this case, completed map taks are not rerun even if the corresponding executors are lost.
   
   The new `spark.shuffle.external.enabled` property allows this new external shuffle behavior to be toggled (independently off the built-in Spark external shuffle service).

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