diff options
Diffstat (limited to 'core/src/test')
| -rw-r--r-- | core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala | 25 | ||||
| -rw-r--r-- | core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala | 213 |
2 files changed, 230 insertions, 8 deletions
diff --git a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala index eb116213f6..9d0c127369 100644 --- a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala +++ b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala @@ -208,7 +208,7 @@ class DAGSchedulerSuite extends FunSuiteLike with BeforeAndAfter with LocalSpar assert(taskSet.tasks.size >= results.size) for ((result, i) <- results.zipWithIndex) { if (i < taskSet.tasks.size) { - runEvent(CompletionEvent(taskSet.tasks(i), result._1, result._2, null, null, null)) + runEvent(CompletionEvent(taskSet.tasks(i), result._1, result._2, null, createFakeTaskInfo(), null)) } } } @@ -219,7 +219,7 @@ class DAGSchedulerSuite extends FunSuiteLike with BeforeAndAfter with LocalSpar for ((result, i) <- results.zipWithIndex) { if (i < taskSet.tasks.size) { runEvent(CompletionEvent(taskSet.tasks(i), result._1, result._2, - Map[Long, Any]((accumId, 1)), null, null)) + Map[Long, Any]((accumId, 1)), createFakeTaskInfo(), null)) } } } @@ -476,7 +476,7 @@ class DAGSchedulerSuite extends FunSuiteLike with BeforeAndAfter with LocalSpar FetchFailed(makeBlockManagerId("hostA"), shuffleId, 0, 0, "ignored"), null, Map[Long, Any](), - null, + createFakeTaskInfo(), null)) assert(sc.listenerBus.waitUntilEmpty(WAIT_TIMEOUT_MILLIS)) assert(sparkListener.failedStages.contains(1)) @@ -487,7 +487,7 @@ class DAGSchedulerSuite extends FunSuiteLike with BeforeAndAfter with LocalSpar FetchFailed(makeBlockManagerId("hostA"), shuffleId, 1, 1, "ignored"), null, Map[Long, Any](), - null, + createFakeTaskInfo(), null)) // The SparkListener should not receive redundant failure events. assert(sc.listenerBus.waitUntilEmpty(WAIT_TIMEOUT_MILLIS)) @@ -507,14 +507,14 @@ class DAGSchedulerSuite extends FunSuiteLike with BeforeAndAfter with LocalSpar assert(newEpoch > oldEpoch) val taskSet = taskSets(0) // should be ignored for being too old - runEvent(CompletionEvent(taskSet.tasks(0), Success, makeMapStatus("hostA", 1), null, null, null)) + runEvent(CompletionEvent(taskSet.tasks(0), Success, makeMapStatus("hostA", 1), null, createFakeTaskInfo(), null)) // should work because it's a non-failed host - runEvent(CompletionEvent(taskSet.tasks(0), Success, makeMapStatus("hostB", 1), null, null, null)) + runEvent(CompletionEvent(taskSet.tasks(0), Success, makeMapStatus("hostB", 1), null, createFakeTaskInfo(), null)) // should be ignored for being too old - runEvent(CompletionEvent(taskSet.tasks(0), Success, makeMapStatus("hostA", 1), null, null, null)) + runEvent(CompletionEvent(taskSet.tasks(0), Success, makeMapStatus("hostA", 1), null, createFakeTaskInfo(), null)) // should work because it's a new epoch taskSet.tasks(1).epoch = newEpoch - runEvent(CompletionEvent(taskSet.tasks(1), Success, makeMapStatus("hostA", 1), null, null, null)) + runEvent(CompletionEvent(taskSet.tasks(1), Success, makeMapStatus("hostA", 1), null, createFakeTaskInfo(), null)) assert(mapOutputTracker.getServerStatuses(shuffleId, 0).map(_._1) === Array(makeBlockManagerId("hostB"), makeBlockManagerId("hostA"))) complete(taskSets(1), Seq((Success, 42), (Success, 43))) @@ -766,5 +766,14 @@ class DAGSchedulerSuite extends FunSuiteLike with BeforeAndAfter with LocalSpar assert(scheduler.shuffleToMapStage.isEmpty) assert(scheduler.waitingStages.isEmpty) } + + // Nothing in this test should break if the task info's fields are null, but + // OutputCommitCoordinator requires the task info itself to not be null. + private def createFakeTaskInfo(): TaskInfo = { + val info = new TaskInfo(0, 0, 0, 0L, "", "", TaskLocality.ANY, false) + info.finishTime = 1 // to prevent spurious errors in JobProgressListener + info + } + } diff --git a/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala new file mode 100644 index 0000000000..3cc860caa1 --- /dev/null +++ b/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala @@ -0,0 +1,213 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.scheduler + +import java.io.File +import java.util.concurrent.TimeoutException + +import org.mockito.Matchers +import org.mockito.Mockito._ +import org.mockito.invocation.InvocationOnMock +import org.mockito.stubbing.Answer +import org.scalatest.{BeforeAndAfter, FunSuite} + +import org.apache.hadoop.mapred.{TaskAttemptID, JobConf, TaskAttemptContext, OutputCommitter} + +import org.apache.spark._ +import org.apache.spark.rdd.{RDD, FakeOutputCommitter} +import org.apache.spark.util.Utils + +import scala.concurrent.Await +import scala.concurrent.duration._ +import scala.language.postfixOps + +/** + * Unit tests for the output commit coordination functionality. + * + * The unit test makes both the original task and the speculated task + * attempt to commit, where committing is emulated by creating a + * directory. If both tasks create directories then the end result is + * a failure. + * + * Note that there are some aspects of this test that are less than ideal. + * In particular, the test mocks the speculation-dequeuing logic to always + * dequeue a task and consider it as speculated. Immediately after initially + * submitting the tasks and calling reviveOffers(), reviveOffers() is invoked + * again to pick up the speculated task. This may be hacking the original + * behavior in too much of an unrealistic fashion. + * + * Also, the validation is done by checking the number of files in a directory. + * Ideally, an accumulator would be used for this, where we could increment + * the accumulator in the output committer's commitTask() call. If the call to + * commitTask() was called twice erroneously then the test would ideally fail because + * the accumulator would be incremented twice. + * + * The problem with this test implementation is that when both a speculated task and + * its original counterpart complete, only one of the accumulator's increments is + * captured. This results in a paradox where if the OutputCommitCoordinator logic + * was not in SparkHadoopWriter, the tests would still pass because only one of the + * increments would be captured even though the commit in both tasks was executed + * erroneously. + */ +class OutputCommitCoordinatorSuite extends FunSuite with BeforeAndAfter { + + var outputCommitCoordinator: OutputCommitCoordinator = null + var tempDir: File = null + var sc: SparkContext = null + + before { + tempDir = Utils.createTempDir() + val conf = new SparkConf() + .setMaster("local[4]") + .setAppName(classOf[OutputCommitCoordinatorSuite].getSimpleName) + .set("spark.speculation", "true") + sc = new SparkContext(conf) { + override private[spark] def createSparkEnv( + conf: SparkConf, + isLocal: Boolean, + listenerBus: LiveListenerBus): SparkEnv = { + outputCommitCoordinator = spy(new OutputCommitCoordinator(conf)) + // Use Mockito.spy() to maintain the default infrastructure everywhere else. + // This mocking allows us to control the coordinator responses in test cases. + SparkEnv.createDriverEnv(conf, isLocal, listenerBus, Some(outputCommitCoordinator)) + } + } + // Use Mockito.spy() to maintain the default infrastructure everywhere else + val mockTaskScheduler = spy(sc.taskScheduler.asInstanceOf[TaskSchedulerImpl]) + + doAnswer(new Answer[Unit]() { + override def answer(invoke: InvocationOnMock): Unit = { + // Submit the tasks, then force the task scheduler to dequeue the + // speculated task + invoke.callRealMethod() + mockTaskScheduler.backend.reviveOffers() + } + }).when(mockTaskScheduler).submitTasks(Matchers.any()) + + doAnswer(new Answer[TaskSetManager]() { + override def answer(invoke: InvocationOnMock): TaskSetManager = { + val taskSet = invoke.getArguments()(0).asInstanceOf[TaskSet] + new TaskSetManager(mockTaskScheduler, taskSet, 4) { + var hasDequeuedSpeculatedTask = false + override def dequeueSpeculativeTask( + execId: String, + host: String, + locality: TaskLocality.Value): Option[(Int, TaskLocality.Value)] = { + if (!hasDequeuedSpeculatedTask) { + hasDequeuedSpeculatedTask = true + Some(0, TaskLocality.PROCESS_LOCAL) + } else { + None + } + } + } + } + }).when(mockTaskScheduler).createTaskSetManager(Matchers.any(), Matchers.any()) + + sc.taskScheduler = mockTaskScheduler + val dagSchedulerWithMockTaskScheduler = new DAGScheduler(sc, mockTaskScheduler) + sc.taskScheduler.setDAGScheduler(dagSchedulerWithMockTaskScheduler) + sc.dagScheduler = dagSchedulerWithMockTaskScheduler + } + + after { + sc.stop() + tempDir.delete() + outputCommitCoordinator = null + } + + test("Only one of two duplicate commit tasks should commit") { + val rdd = sc.parallelize(Seq(1), 1) + sc.runJob(rdd, OutputCommitFunctions(tempDir.getAbsolutePath).commitSuccessfully _, + 0 until rdd.partitions.size, allowLocal = false) + assert(tempDir.list().size === 1) + } + + test("If commit fails, if task is retried it should not be locked, and will succeed.") { + val rdd = sc.parallelize(Seq(1), 1) + sc.runJob(rdd, OutputCommitFunctions(tempDir.getAbsolutePath).failFirstCommitAttempt _, + 0 until rdd.partitions.size, allowLocal = false) + assert(tempDir.list().size === 1) + } + + test("Job should not complete if all commits are denied") { + // Create a mock OutputCommitCoordinator that denies all attempts to commit + doReturn(false).when(outputCommitCoordinator).handleAskPermissionToCommit( + Matchers.any(), Matchers.any(), Matchers.any()) + val rdd: RDD[Int] = sc.parallelize(Seq(1), 1) + def resultHandler(x: Int, y: Unit): Unit = {} + val futureAction: SimpleFutureAction[Unit] = sc.submitJob[Int, Unit, Unit](rdd, + OutputCommitFunctions(tempDir.getAbsolutePath).commitSuccessfully, + 0 until rdd.partitions.size, resultHandler, 0) + // It's an error if the job completes successfully even though no committer was authorized, + // so throw an exception if the job was allowed to complete. + intercept[TimeoutException] { + Await.result(futureAction, 5 seconds) + } + assert(tempDir.list().size === 0) + } +} + +/** + * Class with methods that can be passed to runJob to test commits with a mock committer. + */ +private case class OutputCommitFunctions(tempDirPath: String) { + + // Mock output committer that simulates a successful commit (after commit is authorized) + private def successfulOutputCommitter = new FakeOutputCommitter { + override def commitTask(context: TaskAttemptContext): Unit = { + Utils.createDirectory(tempDirPath) + } + } + + // Mock output committer that simulates a failed commit (after commit is authorized) + private def failingOutputCommitter = new FakeOutputCommitter { + override def commitTask(taskAttemptContext: TaskAttemptContext) { + throw new RuntimeException + } + } + + def commitSuccessfully(iter: Iterator[Int]): Unit = { + val ctx = TaskContext.get() + runCommitWithProvidedCommitter(ctx, iter, successfulOutputCommitter) + } + + def failFirstCommitAttempt(iter: Iterator[Int]): Unit = { + val ctx = TaskContext.get() + runCommitWithProvidedCommitter(ctx, iter, + if (ctx.attemptNumber == 0) failingOutputCommitter else successfulOutputCommitter) + } + + private def runCommitWithProvidedCommitter( + ctx: TaskContext, + iter: Iterator[Int], + outputCommitter: OutputCommitter): Unit = { + def jobConf = new JobConf { + override def getOutputCommitter(): OutputCommitter = outputCommitter + } + val sparkHadoopWriter = new SparkHadoopWriter(jobConf) { + override def newTaskAttemptContext( + conf: JobConf, + attemptId: TaskAttemptID): TaskAttemptContext = { + mock(classOf[TaskAttemptContext]) + } + } + sparkHadoopWriter.setup(ctx.stageId, ctx.partitionId, ctx.attemptNumber) + sparkHadoopWriter.commit() + } +} |