/**
* 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.hadoop.mapred;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import junit.framework.TestCase;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.mapred.FakeObjectUtilities.FakeJobHistory;
import org.apache.hadoop.mapred.JobInProgress.KillInterruptedException;
import org.apache.hadoop.mapred.JobStatusChangeEvent.EventType;
import org.apache.hadoop.mapreduce.Cluster.JobTrackerStatus;
import org.apache.hadoop.mapreduce.server.jobtracker.JTConfig;
public class TestParallelInitialization extends TestCase {
private static int jobCounter;
private static final int NUM_JOBS = 3;
IntWritable numJobsCompleted = new IntWritable();
static void resetCounters() {
jobCounter = 0;
}
class FakeJobInProgress extends JobInProgress {
public FakeJobInProgress(JobConf jobConf,
FakeTaskTrackerManager taskTrackerManager,
JobTracker jt) throws IOException {
super(new JobID("test", ++jobCounter), jobConf, jt);
this.startTime = System.currentTimeMillis();
this.status = new JobStatus(getJobID(), 0f, 0f, JobStatus.PREP,
jobConf.getUser(),
jobConf.getJobName(), "", "");
this.status.setJobPriority(JobPriority.NORMAL);
this.status.setStartTime(startTime);
this.jobHistory = new FakeJobHistory();
}
@Override
public synchronized void initTasks() throws IOException {
try {
int jobNumber = this.getJobID().getId();
synchronized (numJobsCompleted) {
while (numJobsCompleted.get() != (NUM_JOBS - jobNumber)) {
numJobsCompleted.wait();
}
numJobsCompleted.set(numJobsCompleted.get() + 1);
numJobsCompleted.notifyAll();
LOG.info("JobNumber " + jobNumber + " succeeded");
}
} catch (InterruptedException ie) {};
this.status.setRunState(JobStatus.SUCCEEDED);
}
@Override
synchronized void fail() {
this.status.setRunState(JobStatus.FAILED);
}
}
static class FakeTaskTrackerManager implements TaskTrackerManager {
int maps = 0;
int reduces = 0;
int maxMapTasksPerTracker = 2;
int maxReduceTasksPerTracker = 2;
List<JobInProgressListener> listeners =
new ArrayList<JobInProgressListener>();
QueueManager queueManager;
private Map<String, TaskTrackerStatus> trackers =
new HashMap<String, TaskTrackerStatus>();
public FakeTaskTrackerManager() {
JobConf conf = new JobConf();
queueManager = new QueueManager(conf);
trackers.put("tt1", new TaskTrackerStatus("tt1", "tt1.host", 1,
new ArrayList<TaskStatus>(), 0,
maxMapTasksPerTracker, maxReduceTasksPerTracker));
}
public ClusterStatus getClusterStatus() {
int numTrackers = trackers.size();
return new ClusterStatus(numTrackers, 0,
10 * 60 * 1000,
maps, reduces,
numTrackers * maxMapTasksPerTracker,
numTrackers * maxReduceTasksPerTracker,
JobTrackerStatus.RUNNING);
}
public int getNumberOfUniqueHosts() {
return 0;
}
public Collection<TaskTrackerStatus> taskTrackers() {
return trackers.values();
}
public void addJobInProgressListener(JobInProgressListener listener) {
listeners.add(listener);
}
public void removeJobInProgressListener(JobInProgressListener listener) {
listeners.remove(listener);
}
public QueueManager getQueueManager() {
return queueManager;
}
public int getNextHeartbeatInterval() {
return JTConfig.JT_HEARTBEAT_INTERVAL_MIN_DEFAULT;
}
public void killJob(JobID jobid) {
return;
}
public JobInProgress getJob(JobID jobid) {
return null;
}
public boolean killTask(TaskAttemptID attemptId, boolean shouldFail) {
return true;
}
public void initJob(JobInProgress job) {
try {
JobStatus prevStatus = (JobStatus)job.getStatus().clone();
job.initTasks();
if (job.isJobEmpty()) {
completeEmptyJob(job);
} else if (!job.isSetupCleanupRequired()) {
job.completeSetup();
}
JobStatus newStatus = (JobStatus)job.getStatus().clone();
if (prevStatus.getRunState() != newStatus.getRunState()) {
JobStatusChangeEvent event =
new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus,
newStatus);
for (JobInProgressListener listener : listeners) {
listener.jobUpdated(event);
}
}
} catch (KillInterruptedException kie) {
killJob(job.getJobID());
} catch (IOException ioe) {
failJob(job);
}
}
private synchronized void completeEmptyJob(JobInProgress job) {
job.completeEmptyJob();
}
public synchronized void failJob(JobInProgress job) {
JobStatus prevStatus = (JobStatus)job.getStatus().clone();
job.fail();
JobStatus newStatus = (JobStatus)job.getStatus().clone();
if (prevStatus.getRunState() != newStatus.getRunState()) {
JobStatusChangeEvent event =
new JobStatusChangeEvent(job, EventType.RUN_STATE_CHANGED, prevStatus,
newStatus);
for (JobInProgressListener listener : listeners) {
listener.jobUpdated(event);
}
}
}
// Test methods
public void submitJob(JobInProgress job) throws IOException {
for (JobInProgressListener listener : listeners) {
listener.jobAdded(job);
}
}
}
protected JobConf jobConf;
protected TaskScheduler scheduler;
private FakeTaskTrackerManager taskTrackerManager;
@Override
protected void setUp() throws Exception {
resetCounters();
jobConf = new JobConf();
taskTrackerManager = new FakeTaskTrackerManager();
scheduler = createTaskScheduler();
scheduler.setConf(jobConf);
scheduler.setTaskTrackerManager(taskTrackerManager);
scheduler.start();
}
@Override
protected void tearDown() throws Exception {
if (scheduler != null) {
scheduler.terminate();
}
}
protected TaskScheduler createTaskScheduler() {
return new JobQueueTaskScheduler();
}
public void testParallelInitJobs() throws IOException {
FakeJobInProgress[] jobs = new FakeJobInProgress[NUM_JOBS];
// Submit NUM_JOBS jobs in order. The init code will ensure
// that the jobs get inited in descending order of Job ids
// i.e. highest job id first and the smallest last.
// If we were not doing parallel init, the first submitted job
// will be inited first and that will hang
for (int i = 0; i < NUM_JOBS; i++) {
jobs[i] = new FakeJobInProgress(jobConf, taskTrackerManager,
UtilsForTests.getJobTracker());
jobs[i].getStatus().setRunState(JobStatus.PREP);
taskTrackerManager.submitJob(jobs[i]);
}
try {
Thread.sleep(1000);
} catch (InterruptedException ie) {}
for (int i = 0; i < NUM_JOBS; i++) {
assertTrue(jobs[i].getStatus().getRunState() == JobStatus.SUCCEEDED);
}
}
}