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/*
* 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.executor
import java.nio.ByteBuffer
import java.util.concurrent.CountDownLatch
import scala.collection.mutable.HashMap
import org.mockito.Matchers._
import org.mockito.Mockito.{mock, when}
import org.mockito.invocation.InvocationOnMock
import org.mockito.stubbing.Answer
import org.apache.spark._
import org.apache.spark.TaskState.TaskState
import org.apache.spark.memory.MemoryManager
import org.apache.spark.metrics.MetricsSystem
import org.apache.spark.rpc.RpcEnv
import org.apache.spark.scheduler.{FakeTask, Task}
import org.apache.spark.serializer.JavaSerializer
class ExecutorSuite extends SparkFunSuite {
test("SPARK-15963: Catch `TaskKilledException` correctly in Executor.TaskRunner") {
// mock some objects to make Executor.launchTask() happy
val conf = new SparkConf
val serializer = new JavaSerializer(conf)
val mockEnv = mock(classOf[SparkEnv])
val mockRpcEnv = mock(classOf[RpcEnv])
val mockMetricsSystem = mock(classOf[MetricsSystem])
val mockMemoryManager = mock(classOf[MemoryManager])
when(mockEnv.conf).thenReturn(conf)
when(mockEnv.serializer).thenReturn(serializer)
when(mockEnv.rpcEnv).thenReturn(mockRpcEnv)
when(mockEnv.metricsSystem).thenReturn(mockMetricsSystem)
when(mockEnv.memoryManager).thenReturn(mockMemoryManager)
when(mockEnv.closureSerializer).thenReturn(serializer)
val serializedTask =
Task.serializeWithDependencies(
new FakeTask(0, 0),
HashMap[String, Long](),
HashMap[String, Long](),
serializer.newInstance())
// we use latches to force the program to run in this order:
// +-----------------------------+---------------------------------------+
// | main test thread | worker thread |
// +-----------------------------+---------------------------------------+
// | executor.launchTask() | |
// | | TaskRunner.run() begins |
// | | ... |
// | | execBackend.statusUpdate // 1st time |
// | executor.killAllTasks(true) | |
// | | ... |
// | | task = ser.deserialize |
// | | ... |
// | | execBackend.statusUpdate // 2nd time |
// | | ... |
// | | TaskRunner.run() ends |
// | check results | |
// +-----------------------------+---------------------------------------+
val executorSuiteHelper = new ExecutorSuiteHelper
val mockExecutorBackend = mock(classOf[ExecutorBackend])
when(mockExecutorBackend.statusUpdate(any(), any(), any()))
.thenAnswer(new Answer[Unit] {
var firstTime = true
override def answer(invocationOnMock: InvocationOnMock): Unit = {
if (firstTime) {
executorSuiteHelper.latch1.countDown()
// here between latch1 and latch2, executor.killAllTasks() is called
executorSuiteHelper.latch2.await()
firstTime = false
}
else {
// save the returned `taskState` and `testFailedReason` into `executorSuiteHelper`
val taskState = invocationOnMock.getArguments()(1).asInstanceOf[TaskState]
executorSuiteHelper.taskState = taskState
val taskEndReason = invocationOnMock.getArguments()(2).asInstanceOf[ByteBuffer]
executorSuiteHelper.testFailedReason
= serializer.newInstance().deserialize(taskEndReason)
// let the main test thread check `taskState` and `testFailedReason`
executorSuiteHelper.latch3.countDown()
}
}
})
var executor: Executor = null
try {
executor = new Executor("id", "localhost", mockEnv, userClassPath = Nil, isLocal = true)
// the task will be launched in a dedicated worker thread
executor.launchTask(mockExecutorBackend, 0, 0, "", serializedTask)
executorSuiteHelper.latch1.await()
// we know the task will be started, but not yet deserialized, because of the latches we
// use in mockExecutorBackend.
executor.killAllTasks(true)
executorSuiteHelper.latch2.countDown()
executorSuiteHelper.latch3.await()
// `testFailedReason` should be `TaskKilled`; `taskState` should be `KILLED`
assert(executorSuiteHelper.testFailedReason === TaskKilled)
assert(executorSuiteHelper.taskState === TaskState.KILLED)
}
finally {
if (executor != null) {
executor.stop()
}
}
}
}
// Helps to test("SPARK-15963")
private class ExecutorSuiteHelper {
val latch1 = new CountDownLatch(1)
val latch2 = new CountDownLatch(1)
val latch3 = new CountDownLatch(1)
@volatile var taskState: TaskState = _
@volatile var testFailedReason: TaskFailedReason = _
}
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