Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/5636#discussion_r36250719
--- Diff:
core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala ---
@@ -473,6 +473,299 @@ 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, reduceParts: Int):
Seq[(Success.type, MapStatus)] = {
+ stageAttempt.tasks.zipWithIndex.map { case (task, idx) =>
+ (Success, makeMapStatus("host" + ('A' + idx).toChar, reduceParts))
+ }.toSeq
+ }
+
+ def setupStageAbortTest(sc: SparkContext) {
+ sc.listenerBus.addListener(new EndListener())
+ ended = false
+ jobResult = null
+ }
+
+ // 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
+ }
+ }
+
+ // Helper functions to extract commonly used code in Fetch Failure test
cases
+ /**
+ * Common code to get the next stage attempt, confirm it's the one we
expect, and complete it
+ * succesfullly.
+ *
+ * @param stageId - The current stageId
+ * @param attemptIdx - The current attempt count
+ * @param numPartitions - The number of partitions in the next stage
+ */
+ def completeNextShuffleMapSuccesfully(stageId: Int, attemptIdx: Int,
numPartitions: Int): Unit = {
+ val stageAttempt = taskSets.last
+ checkStageId(stageId, attemptIdx, stageAttempt)
+ complete(stageAttempt, makeCompletions(stageAttempt, numPartitions))
+ }
+
+ /**
+ * Common code to get the next stage attempt, confirm it's the one we
expect, and complete it
+ * with an intermediate FetchFailure.
+ *
+ * @param stageId - The current stageId
+ * @param attemptIdx - The current attempt count
+ * @param shuffleId - The shuffleId of the stage with a fetch failure
+ */
+ def completeNextShuffleMapWithFailureAndSuccess(stageId: Int,
+ attemptIdx: Int,
+ shuffleId: Int,
+ numPartitions: Int): Unit = {
+ val stageAttempt = taskSets.last
+ checkStageId(stageId, attemptIdx, stageAttempt)
+
+ val stageSuccesses = stageAttempt.tasks.tail.map { _ => (Success,
makeMapStatus("hostB",
+ numPartitions))}
+ complete(stageAttempt,
+ Seq((FetchFailed(makeBlockManagerId("hostA"), shuffleId, 0, 0,
"ignored"), null))
+ ++ stageSuccesses
+ )
+ }
+
+ /**
+ * Common code to get the next stage attempt, confirm it's the one we
expect, and complete it
+ * with all FetchFailure.
+ *
+ * @param stageId - The current stageId
+ * @param attemptIdx - The current attempt count
+ * @param shuffleId - The shuffleId of the stage with a fetch failure
+ */
+ def completeNextShuffleMapWithFetchFailure(stageId: Int,
+ attemptIdx: Int,
+ shuffleId: Int): Unit = {
+ val stageAttempt = taskSets.last
+ checkStageId(stageId, attemptIdx, stageAttempt)
+
+ complete(stageAttempt, stageAttempt.tasks.zipWithIndex.map{ case
(task, idx) =>
+ (FetchFailed(makeBlockManagerId("hostA"), shuffleId, 0, idx,
"ignored"), null)
+ }.toSeq)
+ }
+
+ /**
+ * Common code to get the next stage attempt, confirm it's the one we
expect, and complete it
+ * with a success where we return 42.
+ *
+ * @param stageId - The current stageId
+ * @param attemptIdx - The current attempt count
+ */
+ def completeNextShuffleMapWithSuccess_42 (stageId: Int, attemptIdx:
Int): Unit = {
--- End diff --
Actually, in this case we're not completing a shufflemap stage, we're
completing a result stage. Maybe we should even add
`assert(scheduler.stageIdToStage(stageId).isInstanceOf[ResultStage])` to double
check & help make any errors in the test setup clear.
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