Github user jinxing64 commented on a diff in the pull request: https://github.com/apache/spark/pull/16620#discussion_r100953546 --- Diff: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala --- @@ -2161,6 +2161,58 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with Timeou } } + test("[SPARK-19263] DAGScheduler should not submit multiple active tasksets," + + " even with late completions from earlier stage attempts") { + val rddA = new MyRDD(sc, 2, Nil) + val shuffleDepA = new ShuffleDependency(rddA, new HashPartitioner(2)) + val shuffleIdA = shuffleDepA.shuffleId + + val rddB = new MyRDD(sc, 2, List(shuffleDepA), tracker = mapOutputTracker) + val shuffleDepB = new ShuffleDependency(rddB, new HashPartitioner(2)) + + val rddC = new MyRDD(sc, 2, List(shuffleDepB), tracker = mapOutputTracker) + + submit(rddC, Array(0, 1)) + + assert(taskSets(0).stageId === 0 && taskSets(0).stageAttemptId === 0) + complete(taskSets(0), Seq( + (Success, makeMapStatus("hostA", 2)), + (Success, makeMapStatus("hostA", 2)))) + + // Fetch failed on hostA. + runEvent(makeCompletionEvent( + taskSets(1).tasks(0), + FetchFailed(makeBlockManagerId("hostA"), shuffleIdA, 0, 0, + "Fetch failure of task: stageId=1, stageAttempt=0, partitionId=0"), + null)) + + scheduler.resubmitFailedStages() + + assert(taskSets(2).stageId === 0 && taskSets(2).stageAttemptId === 1) + complete(taskSets(2), Seq( + (Success, makeMapStatus("hostB", 2)), + (Success, makeMapStatus("hostB", 2)))) + + // Task succeeds on a failed executor. The success is bogus. + runEvent(makeCompletionEvent( + taskSets(1).tasks(1), Success, makeMapStatus("hostA", 2))) + + assert(taskSets(3).stageId === 1 && taskSets(2).stageAttemptId === 1) + runEvent(makeCompletionEvent( + taskSets(3).tasks(0), Success, makeMapStatus("hostB", 2))) + + // There should be no new attempt of stage submitted. + assert(taskSets.size === 4) --- End diff -- Yes, I think so : )
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