/**
* 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.mapreduce.jobhistory;
import static junit.framework.Assert.assertFalse;
import static junit.framework.Assert.assertTrue;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import java.io.File;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileContext;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.Counters;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.TaskID;
import org.apache.hadoop.mapreduce.TaskType;
import org.apache.hadoop.mapreduce.TypeConverter;
import org.apache.hadoop.mapreduce.v2.api.records.JobId;
import org.apache.hadoop.mapreduce.v2.app.AppContext;
import org.apache.hadoop.mapreduce.v2.app.job.Job;
import org.apache.hadoop.mapreduce.v2.util.MRBuilderUtils;
import org.apache.hadoop.yarn.YarnException;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.util.BuilderUtils;
import org.junit.Test;
import org.mockito.Mockito;
import org.mockito.verification.VerificationMode;
public class TestJobHistoryEventHandler {
private static final Log LOG = LogFactory
.getLog(TestJobHistoryEventHandler.class);
@Test
public void testFirstFlushOnCompletionEvent() throws Exception {
TestParams t = new TestParams();
Configuration conf = new Configuration();
conf.set(MRJobConfig.MR_AM_STAGING_DIR, t.workDir);
conf.setLong(MRJobConfig.MR_AM_HISTORY_COMPLETE_EVENT_FLUSH_TIMEOUT_MS,
60 * 1000l);
conf.setInt(MRJobConfig.MR_AM_HISTORY_JOB_COMPLETE_UNFLUSHED_MULTIPLIER, 10);
conf.setInt(MRJobConfig.MR_AM_HISTORY_MAX_UNFLUSHED_COMPLETE_EVENTS, 10);
conf.setInt(
MRJobConfig.MR_AM_HISTORY_USE_BATCHED_FLUSH_QUEUE_SIZE_THRESHOLD, 200);
JHEvenHandlerForTest realJheh =
new JHEvenHandlerForTest(t.mockAppContext, 0);
JHEvenHandlerForTest jheh = spy(realJheh);
jheh.init(conf);
EventWriter mockWriter = null;
try {
jheh.start();
handleEvent(jheh, new JobHistoryEvent(t.jobId, new AMStartedEvent(
t.appAttemptId, 200, t.containerId, "nmhost", 3000, 4000)));
mockWriter = jheh.getEventWriter();
verify(mockWriter).write(any(HistoryEvent.class));
for (int i = 0; i < 100; i++) {
queueEvent(jheh, new JobHistoryEvent(t.jobId, new TaskStartedEvent(
t.taskID, 0, TaskType.MAP, "")));
}
handleNextNEvents(jheh, 100);
verify(mockWriter, times(0)).flush();
// First completion event, but min-queue-size for batching flushes is 10
handleEvent(jheh, new JobHistoryEvent(t.jobId, new TaskFinishedEvent(
t.taskID, null, 0, TaskType.MAP, "", null)));
verify(mockWriter).flush();
} finally {
jheh.stop();
verify(mockWriter).close();
}
}
@Test
public void testMaxUnflushedCompletionEvents() throws Exception {
TestParams t = new TestParams();
Configuration conf = new Configuration();
conf.set(MRJobConfig.MR_AM_STAGING_DIR, t.workDir);
conf.setLong(MRJobConfig.MR_AM_HISTORY_COMPLETE_EVENT_FLUSH_TIMEOUT_MS,
60 * 1000l);
conf.setInt(MRJobConfig.MR_AM_HISTORY_JOB_COMPLETE_UNFLUSHED_MULTIPLIER, 10);
conf.setInt(MRJobConfig.MR_AM_HISTORY_MAX_UNFLUSHED_COMPLETE_EVENTS, 10);
conf.setInt(
MRJobConfig.MR_AM_HISTORY_USE_BATCHED_FLUSH_QUEUE_SIZE_THRESHOLD, 5);
JHEvenHandlerForTest realJheh =
new JHEvenHandlerForTest(t.mockAppContext, 0);
JHEvenHandlerForTest jheh = spy(realJheh);
jheh.init(conf);
EventWriter mockWriter = null;
try {
jheh.start();
handleEvent(jheh, new JobHistoryEvent(t.jobId, new AMStartedEvent(
t.appAttemptId, 200, t.containerId, "nmhost", 3000, 4000)));
mockWriter = jheh.getEventWriter();
verify(mockWriter).write(any(HistoryEvent.class));
for (int i = 0 ; i < 100 ; i++) {
queueEvent(jheh, new JobHistoryEvent(t.jobId, new TaskFinishedEvent(
t.taskID, null, 0, TaskType.MAP, "", null)));
}
handleNextNEvents(jheh, 9);
verify(mockWriter, times(0)).flush();
handleNextNEvents(jheh, 1);
verify(mockWriter).flush();
handleNextNEvents(jheh, 50);
verify(mockWriter, times(6)).flush();
} finally {
jheh.stop();
verify(mockWriter).close();
}
}
@Test
public void testUnflushedTimer() throws Exception {
TestParams t = new TestParams();
Configuration conf = new Configuration();
conf.set(MRJobConfig.MR_AM_STAGING_DIR, t.workDir);
conf.setLong(MRJobConfig.MR_AM_HISTORY_COMPLETE_EVENT_FLUSH_TIMEOUT_MS,
2 * 1000l); //2 seconds.
conf.setInt(MRJobConfig.MR_AM_HISTORY_JOB_COMPLETE_UNFLUSHED_MULTIPLIER, 10);
conf.setInt(MRJobConfig.MR_AM_HISTORY_MAX_UNFLUSHED_COMPLETE_EVENTS, 100);
conf.setInt(
MRJobConfig.MR_AM_HISTORY_USE_BATCHED_FLUSH_QUEUE_SIZE_THRESHOLD, 5);
JHEvenHandlerForTest realJheh =
new JHEvenHandlerForTest(t.mockAppContext, 0);
JHEvenHandlerForTest jheh = spy(realJheh);
jheh.init(conf);
EventWriter mockWriter = null;
try {
jheh.start();
handleEvent(jheh, new JobHistoryEvent(t.jobId, new AMStartedEvent(
t.appAttemptId, 200, t.containerId, "nmhost", 3000, 4000)));
mockWriter = jheh.getEventWriter();
verify(mockWriter).write(any(HistoryEvent.class));
for (int i = 0 ; i < 100 ; i++) {
queueEvent(jheh, new JobHistoryEvent(t.jobId, new TaskFinishedEvent(
t.taskID, null, 0, TaskType.MAP, "", null)));
}
handleNextNEvents(jheh, 9);
verify(mockWriter, times(0)).flush();
Thread.sleep(2 * 4 * 1000l); // 4 seconds should be enough. Just be safe.
verify(mockWriter).flush();
} finally {
jheh.stop();
verify(mockWriter).close();
}
}
@Test
public void testBatchedFlushJobEndMultiplier() throws Exception {
TestParams t = new TestParams();
Configuration conf = new Configuration();
conf.set(MRJobConfig.MR_AM_STAGING_DIR, t.workDir);
conf.setLong(MRJobConfig.MR_AM_HISTORY_COMPLETE_EVENT_FLUSH_TIMEOUT_MS,
60 * 1000l); //2 seconds.
conf.setInt(MRJobConfig.MR_AM_HISTORY_JOB_COMPLETE_UNFLUSHED_MULTIPLIER, 3);
conf.setInt(MRJobConfig.MR_AM_HISTORY_MAX_UNFLUSHED_COMPLETE_EVENTS, 10);
conf.setInt(
MRJobConfig.MR_AM_HISTORY_USE_BATCHED_FLUSH_QUEUE_SIZE_THRESHOLD, 0);
JHEvenHandlerForTest realJheh =
new JHEvenHandlerForTest(t.mockAppContext, 0);
JHEvenHandlerForTest jheh = spy(realJheh);
jheh.init(conf);
EventWriter mockWriter = null;
try {
jheh.start();
handleEvent(jheh, new JobHistoryEvent(t.jobId, new AMStartedEvent(
t.appAttemptId, 200, t.containerId, "nmhost", 3000, 4000)));
mockWriter = jheh.getEventWriter();
verify(mockWriter).write(any(HistoryEvent.class));
for (int i = 0 ; i < 100 ; i++) {
queueEvent(jheh, new JobHistoryEvent(t.jobId, new TaskFinishedEvent(
t.taskID, null, 0, TaskType.MAP, "", null)));
}
queueEvent(jheh, new JobHistoryEvent(t.jobId, new JobFinishedEvent(
TypeConverter.fromYarn(t.jobId), 0, 10, 10, 0, 0, null, null, new Counters())));
handleNextNEvents(jheh, 29);
verify(mockWriter, times(0)).flush();
handleNextNEvents(jheh, 72);
verify(mockWriter, times(4)).flush(); //3 * 30 + 1 for JobFinished
} finally {
jheh.stop();
verify(mockWriter).close();
}
}
private void queueEvent(JHEvenHandlerForTest jheh, JobHistoryEvent event) {
jheh.handle(event);
}
private void handleEvent(JHEvenHandlerForTest jheh, JobHistoryEvent event)
throws InterruptedException {
jheh.handle(event);
jheh.handleEvent(jheh.eventQueue.take());
}
private void handleNextNEvents(JHEvenHandlerForTest jheh, int numEvents)
throws InterruptedException {
for (int i = 0; i < numEvents; i++) {
jheh.handleEvent(jheh.eventQueue.take());
}
}
private String setupTestWorkDir() {
File testWorkDir = new File("target", this.getClass().getCanonicalName());
try {
FileContext.getLocalFSFileContext().delete(
new Path(testWorkDir.getAbsolutePath()), true);
return testWorkDir.getAbsolutePath();
} catch (Exception e) {
LOG.warn("Could not cleanup", e);
throw new YarnException("could not cleanup test dir", e);
}
}
private AppContext mockAppContext(JobId jobId) {
AppContext mockContext = mock(AppContext.class);
Job mockJob = mock(Job.class);
when(mockJob.getTotalMaps()).thenReturn(10);
when(mockJob.getTotalReduces()).thenReturn(10);
when(mockJob.getName()).thenReturn("mockjob");
when(mockContext.getJob(jobId)).thenReturn(mockJob);
return mockContext;
}
private class TestParams {
String workDir = setupTestWorkDir();
ApplicationId appId = BuilderUtils.newApplicationId(200, 1);
ApplicationAttemptId appAttemptId =
BuilderUtils.newApplicationAttemptId(appId, 1);
ContainerId containerId = BuilderUtils.newContainerId(appAttemptId, 1);
TaskID taskID = TaskID.forName("task_200707121733_0003_m_000005");
JobId jobId = MRBuilderUtils.newJobId(appId, 1);
AppContext mockAppContext = mockAppContext(jobId);
}
private JobHistoryEvent getEventToEnqueue(JobId jobId) {
JobHistoryEvent toReturn = Mockito.mock(JobHistoryEvent.class);
HistoryEvent he = Mockito.mock(HistoryEvent.class);
Mockito.when(he.getEventType()).thenReturn(EventType.JOB_STATUS_CHANGED);
Mockito.when(toReturn.getHistoryEvent()).thenReturn(he);
Mockito.when(toReturn.getJobID()).thenReturn(jobId);
return toReturn;
}
@Test
/**
* Tests that in case of SIGTERM, the JHEH stops without processing its event
* queue (because we must stop quickly lest we get SIGKILLed) and processes
* a JobUnsuccessfulEvent for jobs which were still running (so that they may
* show up in the JobHistoryServer)
*/
public void testSigTermedFunctionality() throws IOException {
AppContext mockedContext = Mockito.mock(AppContext.class);
JHEventHandlerForSigtermTest jheh =
new JHEventHandlerForSigtermTest(mockedContext, 0);
JobId jobId = Mockito.mock(JobId.class);
jheh.addToFileMap(jobId);
//Submit 4 events and check that they're handled in the absence of a signal
final int numEvents = 4;
JobHistoryEvent events[] = new JobHistoryEvent[numEvents];
for(int i=0; i < numEvents; ++i) {
events[i] = getEventToEnqueue(jobId);
jheh.handle(events[i]);
}
jheh.stop();
//Make sure events were handled
assertTrue("handleEvent should've been called only 4 times but was "
+ jheh.eventsHandled, jheh.eventsHandled == 4);
//Create a new jheh because the last stop closed the eventWriter etc.
jheh = new JHEventHandlerForSigtermTest(mockedContext, 0);
// Make constructor of JobUnsuccessfulCompletionEvent pass
Job job = Mockito.mock(Job.class);
Mockito.when(mockedContext.getJob(jobId)).thenReturn(job);
// Make TypeConverter(JobID) pass
ApplicationId mockAppId = Mockito.mock(ApplicationId.class);
Mockito.when(mockAppId.getClusterTimestamp()).thenReturn(1000l);
Mockito.when(jobId.getAppId()).thenReturn(mockAppId);
jheh.addToFileMap(jobId);
jheh.setSignalled(true);
for(int i=0; i < numEvents; ++i) {
events[i] = getEventToEnqueue(jobId);
jheh.handle(events[i]);
}
jheh.stop();
//Make sure events were handled, 4 + 1 finish event
assertTrue("handleEvent should've been called only 5 times but was "
+ jheh.eventsHandled, jheh.eventsHandled == 5);
assertTrue("Last event handled wasn't JobUnsuccessfulCompletionEvent",
jheh.lastEventHandled.getHistoryEvent()
instanceof JobUnsuccessfulCompletionEvent);
}
}
class JHEvenHandlerForTest extends JobHistoryEventHandler {
private EventWriter eventWriter;
volatile int handleEventCompleteCalls = 0;
volatile int handleEventStartedCalls = 0;
public JHEvenHandlerForTest(AppContext context, int startCount) {
super(context, startCount);
}
@Override
public void start() {
}
@Override
protected EventWriter createEventWriter(Path historyFilePath)
throws IOException {
this.eventWriter = mock(EventWriter.class);
return this.eventWriter;
}
@Override
protected void closeEventWriter(JobId jobId) {
}
public EventWriter getEventWriter() {
return this.eventWriter;
}
}
/**
* Class to help with testSigTermedFunctionality
*/
class JHEventHandlerForSigtermTest extends JobHistoryEventHandler {
private MetaInfo metaInfo;
public JHEventHandlerForSigtermTest(AppContext context, int startCount) {
super(context, startCount);
}
public void addToFileMap(JobId jobId) {
metaInfo = Mockito.mock(MetaInfo.class);
Mockito.when(metaInfo.isWriterActive()).thenReturn(true);
fileMap.put(jobId, metaInfo);
}
JobHistoryEvent lastEventHandled;
int eventsHandled = 0;
@Override
protected void handleEvent(JobHistoryEvent event) {
this.lastEventHandled = event;
this.eventsHandled++;
}
}