Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/5636#discussion_r35719924
--- Diff:
core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala ---
@@ -473,6 +473,322 @@ class DAGSchedulerSuite
assertDataStructuresEmpty()
}
+ // Helper function to validate state when creating tests for task
failures
+ def checkStageId(stageId: Int, attempt: Int, stageAttempt: TaskSet) {
+ assert(stageAttempt.stageId === stageId)
+ assert(stageAttempt.stageAttemptId == attempt)
+ }
+
+ def makeCompletions(stageAttempt: TaskSet): Seq[(Success.type,
MapStatus)] = {
+ stageAttempt.tasks.zipWithIndex.map { case (task, idx) =>
+ (Success, makeMapStatus("host" + ('A' + idx).toChar,
stageAttempt.tasks.size))
+ }.toSeq
+ }
+
+ /**
+ * In this test we simulate a job failure where the first stage
completes successfully and
+ * the second stage fails due to a fetch failure. Multiple successive
fetch failures of a stage
+ * trigger an overall stage abort to avoid endless retries.
+ */
+ test("Multiple consecutive stage failures should lead to task being
aborted.") {
+ // Create a new Listener to confirm that the listenerBus sees the
JobEnd message
+ // when we abort the stage. This message will also be consumed by the
EventLoggingListener
+ // so this will propagate up to the user.
+ var ended = false
+ var jobResult : JobResult = null
+ class EndListener extends SparkListener {
+ override def onJobEnd(jobEnd: SparkListenerJobEnd): Unit = {
+ jobResult = jobEnd.jobResult
+ ended = true
+ }
+ }
+
+ sc.listenerBus.addListener(new EndListener())
+
+ val shuffleMapRdd = new MyRDD(sc, 2, Nil)
+ val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+ val shuffleId = shuffleDep.shuffleId
+ val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+ submit(reduceRdd, Array(0, 1))
+
+ for (attempt <- 0 until Stage.MAX_STAGE_FAILURES) {
+ // Complete all the tasks for the current attempt of stage 0
successfully
+ val stage0Attempt = taskSets.last
+
+ // Confirm that this is the next attempt for stage 0
+ checkStageId(0, attempt, stage0Attempt)
+
+ // Make each task in stage 0 success
+ val completions = makeCompletions(stage0Attempt)
--- End diff --
eg., here, the `reduceParts` arg to `makeCompletions` should be 2, since
the next stage has 2 partitions. (That matters for when this gets run on the
second attempt, b/c there will only be one task, so its not the same.)
---
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