Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/4055#discussion_r33075440
--- Diff:
core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala ---
@@ -598,6 +598,59 @@ class DAGSchedulerSuite
assertDataStructuresEmpty()
}
+ test("run with ShuffleMapStage retry") {
+ val firstRDD = new MyRDD(sc, 3, Nil)
+ val firstShuffleDep = new ShuffleDependency(firstRDD, null)
+ val firstShuffleId = firstShuffleDep.shuffleId
+ val shuffleMapRdd = new MyRDD(sc, 3, List(firstShuffleDep))
+ val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+ val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
+ submit(reduceRdd, Array(0))
+
+ complete(taskSets(0), Seq(
+ (Success, makeMapStatus("hostB", shuffleMapRdd.partitions.size)),
+ (Success, makeMapStatus("hostB", shuffleMapRdd.partitions.size)),
+ (Success, makeMapStatus("hostA", shuffleMapRdd.partitions.size))
+ ))
+
+ complete(taskSets(1), Seq(
+ (Success, makeMapStatus("hostA", reduceRdd.partitions.size)),
+ (Success, makeMapStatus("hostB", reduceRdd.partitions.size))
+ ))
+ runEvent(ExecutorLost("exec-hostA"))
+ // Resubmit already succcessd in hostA task
+ runEvent(CompletionEvent(taskSets(1).tasks(0), Resubmitted,
+ null, null, createFakeTaskInfo(), null))
+
+ // Cause mapOutTracker remove hostA outputs for taskset(0).
+ // Task that resubmitted will fetch matadata failed.
+ runEvent(CompletionEvent(taskSets(1).tasks(0),
+ FetchFailed(null, firstShuffleId, 2, 0, "Fetch failed"),
+ null, null, createFakeTaskInfo(), null))
+
+ // FetchFailed cause resubmit failed Stages.
+ scheduler.resubmitFailedStages()
+
+ runEvent(CompletionEvent(taskSets(0).tasks(2), Success,
+ makeMapStatus("hostC", shuffleMapRdd.partitions.size), null,
createFakeTaskInfo(), null))
--- End diff --
If this is for the resubmit of stage 0, then I think you really want
`taskSets(2).tasks(0)`. In fact to be really sure its the right event, you
could do something like
```scala
val stage0Resubmit = taskSets(2)
assert(stage0Resubmit.stageId == 0)
assert(stage0Resubmit.attempt === 1)
val task = stage0Resubmit.tasks(0)
assert(task.partitionId === 2)
runEvent(CompletionEvent(task, Success,
makeMapStatus("hostC", shuffleMapRdd.partitions.size), null,
createFakeTaskInfo(), null))
```
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