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MAPREDUCE-4089. Hung Tasks never time out. (Robert Evans via tgraves) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1308531 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Thomas Graves 2012-04-02 20:20:41 +00:00
parent 354025b6e7
commit bb74427da2
5 changed files with 142 additions and 35 deletions
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4
hadoop-mapreduce-project/CHANGES.txt
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@ -211,7 +211,9 @@ Release 0.23.3 - UNRELEASED
BUG FIXES
MAPREDUCE-4092. commitJob Exception does not fail job (Jon Eagles via
bobby)
bobby)
MAPREDUCE-4089. Hung Tasks never time out. (Robert Evans via tgraves)
Release 0.23.2 - UNRELEASED

14
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapred/TaskAttemptListenerImpl.java
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@ -175,7 +175,7 @@ public class TaskAttemptListenerImpl extends CompositeService
org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID =
TypeConverter.toYarn(taskAttemptID);
taskHeartbeatHandler.receivedPing(attemptID);
taskHeartbeatHandler.progressing(attemptID);
Job job = context.getJob(attemptID.getTaskId().getJobId());
Task task = job.getTask(attemptID.getTaskId());
@ -203,7 +203,7 @@ public class TaskAttemptListenerImpl extends CompositeService
org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID =
TypeConverter.toYarn(taskAttemptID);
taskHeartbeatHandler.receivedPing(attemptID);
taskHeartbeatHandler.progressing(attemptID);
//Ignorable TaskStatus? - since a task will send a LastStatusUpdate
context.getEventHandler().handle(
new TaskAttemptEvent(attemptID,
@ -217,7 +217,7 @@ public class TaskAttemptListenerImpl extends CompositeService
org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID =
TypeConverter.toYarn(taskAttemptID);
taskHeartbeatHandler.receivedPing(attemptID);
taskHeartbeatHandler.progressing(attemptID);
context.getEventHandler().handle(
new TaskAttemptEvent(attemptID, TaskAttemptEventType.TA_DONE));
@ -270,7 +270,7 @@ public class TaskAttemptListenerImpl extends CompositeService
context.getJob(attemptID.getTaskId().getJobId()).getTaskAttemptCompletionEvents(
fromEventId, maxEvents);
taskHeartbeatHandler.receivedPing(attemptID);
taskHeartbeatHandler.progressing(attemptID);
// filter the events to return only map completion events in old format
List<TaskCompletionEvent> mapEvents = new ArrayList<TaskCompletionEvent>();
@ -287,7 +287,7 @@ public class TaskAttemptListenerImpl extends CompositeService
@Override
public boolean ping(TaskAttemptID taskAttemptID) throws IOException {
LOG.info("Ping from " + taskAttemptID.toString());
taskHeartbeatHandler.receivedPing(TypeConverter.toYarn(taskAttemptID));
taskHeartbeatHandler.pinged(TypeConverter.toYarn(taskAttemptID));
return true;
}
@ -299,7 +299,7 @@ public class TaskAttemptListenerImpl extends CompositeService
org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID =
TypeConverter.toYarn(taskAttemptID);
taskHeartbeatHandler.receivedPing(attemptID);
taskHeartbeatHandler.progressing(attemptID);
// This is mainly used for cases where we want to propagate exception traces
// of tasks that fail.
@ -317,7 +317,7 @@ public class TaskAttemptListenerImpl extends CompositeService
LOG.info("Status update from " + taskAttemptID.toString());
org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId yarnAttemptID =
TypeConverter.toYarn(taskAttemptID);
taskHeartbeatHandler.receivedPing(yarnAttemptID);
taskHeartbeatHandler.progressing(yarnAttemptID);
TaskAttemptStatus taskAttemptStatus =
new TaskAttemptStatus();
taskAttemptStatus.id = yarnAttemptID;

88
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/TaskHeartbeatHandler.java
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@ -44,9 +44,36 @@ import org.apache.hadoop.yarn.service.AbstractService;
*/
@SuppressWarnings({"unchecked", "rawtypes"})
public class TaskHeartbeatHandler extends AbstractService {
private static class ReportTime {
private long lastPing;
private long lastProgress;
public ReportTime(long time) {
setLastProgress(time);
}
public synchronized void setLastPing(long time) {
lastPing = time;
}
public synchronized void setLastProgress(long time) {
lastProgress = time;
lastPing = time;
}
public synchronized long getLastPing() {
return lastPing;
}
public synchronized long getLastProgress() {
return lastProgress;
}
}
private static final Log LOG = LogFactory.getLog(TaskHeartbeatHandler.class);
private static final int PING_TIMEOUT = 5 * 60 * 1000;
//thread which runs periodically to see the last time since a heartbeat is
//received from a task.
private Thread lostTaskCheckerThread;
@ -56,8 +83,8 @@ public class TaskHeartbeatHandler extends AbstractService {
private final EventHandler eventHandler;
private final Clock clock;
private ConcurrentMap<TaskAttemptId, Long> runningAttempts;
private ConcurrentMap<TaskAttemptId, ReportTime> runningAttempts;
public TaskHeartbeatHandler(EventHandler eventHandler, Clock clock,
int numThreads) {
@ -65,7 +92,7 @@ public class TaskHeartbeatHandler extends AbstractService {
this.eventHandler = eventHandler;
this.clock = clock;
runningAttempts =
new ConcurrentHashMap<TaskAttemptId, Long>(16, 0.75f, numThreads);
new ConcurrentHashMap<TaskAttemptId, ReportTime>(16, 0.75f, numThreads);
}
@Override
@ -91,14 +118,26 @@ public class TaskHeartbeatHandler extends AbstractService {
super.stop();
}
public void receivedPing(TaskAttemptId attemptID) {
public void progressing(TaskAttemptId attemptID) {
//only put for the registered attempts
//TODO throw an exception if the task isn't registered.
runningAttempts.replace(attemptID, clock.getTime());
ReportTime time = runningAttempts.get(attemptID);
if(time != null) {
time.setLastProgress(clock.getTime());
}
}
public void pinged(TaskAttemptId attemptID) {
//only put for the registered attempts
//TODO throw an exception if the task isn't registered.
ReportTime time = runningAttempts.get(attemptID);
if(time != null) {
time.setLastPing(clock.getTime());
}
}
public void register(TaskAttemptId attemptID) {
runningAttempts.put(attemptID, clock.getTime());
runningAttempts.put(attemptID, new ReportTime(clock.getTime()));
}
public void unregister(TaskAttemptId attemptID) {
@ -110,30 +149,27 @@ public class TaskHeartbeatHandler extends AbstractService {
@Override
public void run() {
while (!stopped && !Thread.currentThread().isInterrupted()) {
Iterator<Map.Entry<TaskAttemptId, Long>> iterator =
Iterator<Map.Entry<TaskAttemptId, ReportTime>> iterator =
runningAttempts.entrySet().iterator();
// avoid calculating current time everytime in loop
long currentTime = clock.getTime();
while (iterator.hasNext()) {
Map.Entry<TaskAttemptId, Long> entry = iterator.next();
if (currentTime > entry.getValue() + taskTimeOut) {
//In case the iterator isn't picking up the latest.
// Extra lookup outside of the iterator - but only if the task
// is considered to be timed out.
Long taskTime = runningAttempts.get(entry.getKey());
if (taskTime != null && currentTime > taskTime + taskTimeOut) {
// task is lost, remove from the list and raise lost event
iterator.remove();
eventHandler.handle(new TaskAttemptDiagnosticsUpdateEvent(entry
.getKey(), "AttemptID:" + entry.getKey().toString()
+ " Timed out after " + taskTimeOut / 1000 + " secs"));
eventHandler.handle(new TaskAttemptEvent(entry.getKey(),
TaskAttemptEventType.TA_TIMED_OUT));
}
Map.Entry<TaskAttemptId, ReportTime> entry = iterator.next();
boolean taskTimedOut = (taskTimeOut > 0) &&
(currentTime > (entry.getValue().getLastProgress() + taskTimeOut));
boolean pingTimedOut =
(currentTime > (entry.getValue().getLastPing() + PING_TIMEOUT));
if(taskTimedOut || pingTimedOut) {
// task is lost, remove from the list and raise lost event
iterator.remove();
eventHandler.handle(new TaskAttemptDiagnosticsUpdateEvent(entry
.getKey(), "AttemptID:" + entry.getKey().toString()
+ " Timed out after " + taskTimeOut / 1000 + " secs"));
eventHandler.handle(new TaskAttemptEvent(entry.getKey(),
TaskAttemptEventType.TA_TIMED_OUT));
}
}
try {

69
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestTaskHeartbeatHandler.java Normal file
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@ -0,0 +1,69 @@
/**
* 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.v2.app;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.v2.api.records.JobId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
import org.apache.hadoop.mapreduce.v2.util.MRBuilderUtils;
import org.apache.hadoop.yarn.Clock;
import org.apache.hadoop.yarn.SystemClock;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.event.Event;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.util.BuilderUtils;
import org.junit.Test;
import static org.mockito.Mockito.*;
public class TestTaskHeartbeatHandler {
@SuppressWarnings({ "rawtypes", "unchecked" })
@Test
public void testTimeout() throws InterruptedException {
EventHandler mockHandler = mock(EventHandler.class);
Clock clock = new SystemClock();
TaskHeartbeatHandler hb = new TaskHeartbeatHandler(mockHandler, clock, 1);
Configuration conf = new Configuration();
conf.setInt(MRJobConfig.TASK_TIMEOUT, 10); //10 ms
conf.setInt(MRJobConfig.TASK_TIMEOUT_CHECK_INTERVAL_MS, 10); //10 ms
hb.init(conf);
hb.start();
try {
ApplicationId appId = BuilderUtils.newApplicationId(0l, 5);
JobId jobId = MRBuilderUtils.newJobId(appId, 4);
TaskId tid = MRBuilderUtils.newTaskId(jobId, 3, TaskType.MAP);
TaskAttemptId taid = MRBuilderUtils.newTaskAttemptId(tid, 2);
hb.register(taid);
Thread.sleep(100);
//Events only happen when the task is canceled
verify(mockHandler, times(2)).handle(any(Event.class));
} finally {
hb.stop();
}
}
}

2
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
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@ -351,7 +351,7 @@
<value>600000</value>
<description>The number of milliseconds before a task will be
terminated if it neither reads an input, writes an output, nor
updates its status string.
updates its status string. A value of 0 disables the timeout.
</description>
</property>