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partial fix for AMQ2149|http://issues.apache.org/activemq/browse/AMQ-2149 , contention when usage limit reached can lead to out or order mesage dispatch 

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@755715 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Gary Tully 2009-03-18 19:49:39 +00:00
parent a1cccb9ed9
commit 08aecbee6e
6 changed files with 256 additions and 34 deletions
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51
activemq-core/src/main/java/org/apache/activemq/broker/region/Queue.java
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@ -70,6 +70,8 @@ import org.apache.activemq.thread.Task;
import org.apache.activemq.thread.TaskRunner;
import org.apache.activemq.thread.TaskRunnerFactory;
import org.apache.activemq.transaction.Synchronization;
import org.apache.activemq.usage.Usage;
import org.apache.activemq.usage.UsageListener;
import org.apache.activemq.util.BrokerSupport;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@ -81,7 +83,7 @@ import org.apache.commons.logging.LogFactory;
*
* @version $Revision: 1.28 $
*/
public class Queue extends BaseDestination implements Task {
public class Queue extends BaseDestination implements Task, UsageListener {
protected static final Log LOG = LogFactory.getLog(Queue.class);
protected TaskRunnerFactory taskFactory;
protected TaskRunner taskRunner;
@ -133,6 +135,16 @@ public class Queue extends BaseDestination implements Task {
}
}
// make the queue easily visible in the debugger from its task runner threads
final class QueueThread extends Thread {
final Queue queue;
public QueueThread(Runnable runnable, String name,
Queue queue) {
super(runnable, name);
this.queue = queue;
}
}
public void initialize() throws Exception {
if (this.messages == null) {
if (destination.isTemporary() || broker == null || store == null) {
@ -153,9 +165,10 @@ public class Queue extends BaseDestination implements Task {
if (isOptimizedDispatch()) {
this.taskRunner = taskFactory.createTaskRunner(this, "TempQueue: " + destination.getPhysicalName());
}else {
final Queue queue = this;
this.executor = Executors.newSingleThreadExecutor(new ThreadFactory() {
public Thread newThread(Runnable runnable) {
Thread thread = new Thread(runnable, "QueueThread:"+destination);
Thread thread = new QueueThread(runnable, "QueueThread:"+destination, queue);
thread.setDaemon(true);
thread.setPriority(Thread.NORM_PRIORITY);
return thread;
@ -565,6 +578,7 @@ public class Queue extends BaseDestination implements Task {
if (memoryUsage != null) {
memoryUsage.start();
}
systemUsage.getMemoryUsage().addUsageListener(this);
messages.start();
doPageIn(false);
}
@ -579,6 +593,8 @@ public class Queue extends BaseDestination implements Task {
if (messages != null) {
messages.stop();
}
systemUsage.getMemoryUsage().removeUsageListener(this);
if (memoryUsage != null) {
memoryUsage.stop();
}
@ -1000,6 +1016,15 @@ public class Queue extends BaseDestination implements Task {
public boolean iterate() {
boolean pageInMoreMessages = false;
synchronized(iteratingMutex) {
// do early to allow dispatch of these waiting messages
synchronized(messagesWaitingForSpace) {
while (!messagesWaitingForSpace.isEmpty() && !memoryUsage.isFull()) {
Runnable op = messagesWaitingForSpace.removeFirst();
op.run();
}
}
BrowserDispatch rd;
while ((rd = getNextBrowserDispatch()) != null) {
pageInMoreMessages = true;
@ -1078,13 +1103,7 @@ public class Queue extends BaseDestination implements Task {
LOG.error("Failed to page in more queue messages ", e);
}
}
synchronized(messagesWaitingForSpace) {
while (!messagesWaitingForSpace.isEmpty() && !memoryUsage.isFull()) {
Runnable op = messagesWaitingForSpace.removeFirst();
op.run();
}
}
return false;
return !messagesWaitingForSpace.isEmpty();
}
}
@ -1520,4 +1539,18 @@ public class Queue extends BaseDestination implements Task {
}
return sub;
}
public void onUsageChanged(Usage usage, int oldPercentUsage, int newPercentUsage) {
if (oldPercentUsage > newPercentUsage) {
synchronized(messagesWaitingForSpace) {
if (!messagesWaitingForSpace.isEmpty() && !memoryUsage.isFull()) {
try {
this.taskRunner.wakeup();
} catch (InterruptedException e) {
LOG.warn(getName() + " failed to wakeup task runner on usageChange: " + e);
}
}
}
}
}
}

23
activemq-core/src/main/java/org/apache/activemq/broker/region/cursors/AbstractStoreCursor.java
View File

@ -25,8 +25,6 @@ import org.apache.activemq.broker.region.MessageReference;
import org.apache.activemq.command.Message;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.store.MessageRecoveryListener;
import org.apache.activemq.usage.Usage;
import org.apache.activemq.usage.UsageListener;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@ -34,7 +32,7 @@ import org.apache.commons.logging.LogFactory;
* Store based cursor
*
*/
public abstract class AbstractStoreCursor extends AbstractPendingMessageCursor implements MessageRecoveryListener, UsageListener {
public abstract class AbstractStoreCursor extends AbstractPendingMessageCursor implements MessageRecoveryListener {
private static final Log LOG = LogFactory.getLog(AbstractStoreCursor.class);
protected final Destination regionDestination;
private final LinkedHashMap<MessageId,Message> batchList = new LinkedHashMap<MessageId,Message> ();
@ -60,11 +58,9 @@ public abstract class AbstractStoreCursor extends AbstractPendingMessageCursor i
cacheEnabled=true;
}
}
getSystemUsage().getMemoryUsage().addUsageListener(this);
}
public final synchronized void stop() throws Exception {
getSystemUsage().getMemoryUsage().removeUsageListener(this);
resetBatch();
super.stop();
gc();
@ -160,9 +156,11 @@ public abstract class AbstractStoreCursor extends AbstractPendingMessageCursor i
if (cacheEnabled) {
cacheEnabled=false;
// sync with store on disabling the cache
if (lastCachedId != null) {
setBatch(lastCachedId);
}
}
}
size++;
}
@ -190,20 +188,6 @@ public abstract class AbstractStoreCursor extends AbstractPendingMessageCursor i
batchList.remove(node.getMessageId());
}
public final synchronized void onUsageChanged(Usage usage, int oldPercentUsage,
int newPercentUsage) {
if (oldPercentUsage > newPercentUsage && oldPercentUsage >= memoryUsageHighWaterMark) {
storeHasMessages = true;
try {
fillBatch();
} catch (Exception e) {
LOG.error("Failed to fill batch ", e);
}
}
}
public final synchronized void clear() {
gc();
}
@ -229,7 +213,6 @@ public abstract class AbstractStoreCursor extends AbstractPendingMessageCursor i
resetBatch();
this.batchResetNeeded = false;
}
if( this.batchList.isEmpty() && (this.storeHasMessages ||this.size >0)) {
this.storeHasMessages = false;
try {

9
activemq-core/src/main/java/org/apache/activemq/store/kahadaptor/KahaReferenceStore.java
View File

@ -32,7 +32,8 @@ import org.apache.activemq.kaha.StoreEntry;
import org.apache.activemq.store.MessageRecoveryListener;
import org.apache.activemq.store.ReferenceStore;
import org.apache.activemq.store.AbstractMessageStore;
import org.apache.activemq.usage.MemoryUsage;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author rajdavies
@ -40,6 +41,7 @@ import org.apache.activemq.usage.MemoryUsage;
*/
public class KahaReferenceStore extends AbstractMessageStore implements ReferenceStore {
private static final Log LOG = LogFactory.getLog(KahaReferenceStore.class);
protected final MapContainer<MessageId, ReferenceRecord> messageContainer;
protected KahaReferenceStoreAdapter adapter;
private StoreEntry batchEntry;
@ -120,6 +122,11 @@ public class KahaReferenceStore extends AbstractMessageStore implements Referenc
if ( recoverReference(listener, msg)) {
count++;
lastBatchId = msg.getMessageId();
} else {
if (LOG.isDebugEnabled()) {
LOG.debug(destination.getQualifiedName() + " did not recover:" + msg.getMessageId());
}
break;
}
} else {
lastBatchId = null;

199
activemq-core/src/test/java/org/apache/activemq/bugs/AMQ2149Test.java Normal file
View File

@ -0,0 +1,199 @@
/**
* 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.activemq.bugs;
import java.util.Vector;
import junit.framework.TestCase;
import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.usage.MemoryUsage;
import org.apache.activemq.usage.SystemUsage;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class AMQ2149Test extends TestCase {
private static final Log log = LogFactory.getLog(AMQ2149Test.class);
private String BROKER_URL;
private final String SEQ_NUM_PROPERTY = "seqNum";
final int MESSAGE_LENGTH_BYTES = 75000;
final int MAX_TO_SEND = 2000;
final long SLEEP_BETWEEN_SEND_MS = 5;
final int NUM_SENDERS_AND_RECEIVERS = 10;
BrokerService broker;
Vector<Throwable> exceptions = new Vector<Throwable>();
public void setUp() throws Exception {
broker = new BrokerService();
broker.addConnector("tcp://localhost:0");
broker.deleteAllMessages();
SystemUsage usage = new SystemUsage();
MemoryUsage memoryUsage = new MemoryUsage();
memoryUsage.setLimit(2048 * 7 * NUM_SENDERS_AND_RECEIVERS);
usage.setMemoryUsage(memoryUsage);
broker.setSystemUsage(usage);
broker.start();
BROKER_URL = "failover:("
+ broker.getTransportConnectors().get(0).getUri()
+")?maxReconnectDelay=1000&useExponentialBackOff=false";
}
public void tearDown() throws Exception {
broker.stop();
}
private String buildLongString() {
final StringBuilder stringBuilder = new StringBuilder(
MESSAGE_LENGTH_BYTES);
for (int i = 0; i < MESSAGE_LENGTH_BYTES; ++i) {
stringBuilder.append((int) (Math.random() * 10));
}
return stringBuilder.toString();
}
private class Receiver implements MessageListener {
private final String queueName;
private final Connection connection;
private final Session session;
private final MessageConsumer messageConsumer;
private volatile long nextExpectedSeqNum = 0;
public Receiver(String queueName) throws JMSException {
this.queueName = queueName;
connection = new ActiveMQConnectionFactory(BROKER_URL)
.createConnection();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
messageConsumer = session.createConsumer(new ActiveMQQueue(
queueName));
messageConsumer.setMessageListener(this);
connection.start();
}
public void onMessage(Message message) {
try {
final long seqNum = message.getLongProperty(SEQ_NUM_PROPERTY);
if ((seqNum % 100) == 0) {
log.info(queueName + " received " + seqNum);
}
if (seqNum != nextExpectedSeqNum) {
log.warn(queueName + " received " + seqNum + " expected "
+ nextExpectedSeqNum);
fail(queueName + " received " + seqNum + " expected "
+ nextExpectedSeqNum);
}
++nextExpectedSeqNum;
} catch (Throwable e) {
log.error(queueName + " onMessage error", e);
exceptions.add(e);
}
}
}
private class Sender implements Runnable {
private final String queueName;
private final Connection connection;
private final Session session;
private final MessageProducer messageProducer;
private volatile long nextSequenceNumber = 0;
public Sender(String queueName) throws JMSException {
this.queueName = queueName;
connection = new ActiveMQConnectionFactory(BROKER_URL)
.createConnection();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
messageProducer = session.createProducer(new ActiveMQQueue(
queueName));
messageProducer.setDeliveryMode(DeliveryMode.PERSISTENT);
connection.start();
}
public void run() {
final String longString = buildLongString();
while (nextSequenceNumber <= MAX_TO_SEND) {
try {
final Message message = session
.createTextMessage(longString);
message.setLongProperty(SEQ_NUM_PROPERTY,
nextSequenceNumber);
++nextSequenceNumber;
messageProducer.send(message);
} catch (Exception e) {
log.error(queueName + " send error", e);
exceptions.add(e);
}
try {
Thread.sleep(SLEEP_BETWEEN_SEND_MS);
} catch (InterruptedException e) {
log.warn(queueName + " sleep interrupted", e);
}
}
}
}
public void testOutOfOrderWithMemeUsageLimit() throws Exception {
Vector<Thread> threads = new Vector<Thread>();
for (int i = 0; i < NUM_SENDERS_AND_RECEIVERS; ++i) {
final String queueName = "test.queue." + i;
new Receiver(queueName);
Thread thread = new Thread(new Sender(queueName));
thread.start();
threads.add(thread);
}
final long expiry = System.currentTimeMillis() + 1000 * 60 * 5;
while(!threads.isEmpty() && exceptions.isEmpty() && System.currentTimeMillis() < expiry) {
Thread sendThread = threads.firstElement();
sendThread.join(1000*10);
if (!sendThread.isAlive()) {
threads.remove(sendThread);
}
}
assertTrue("No timeout waiting for senders to complete", System.currentTimeMillis() < expiry);
assertTrue("No exceptions", exceptions.isEmpty());
}
}

2
activemq-core/src/test/resources/org/apache/activemq/broker/ft/master.xml
View File

@ -18,7 +18,7 @@
<beans>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"/>
<broker brokerName="master" persistent="false" useJmx="false" deleteAllMessagesOnStartup="true" xmlns="http://activemq.apache.org/schema/core">
<broker brokerName="master" useJmx="false" deleteAllMessagesOnStartup="true" xmlns="http://activemq.apache.org/schema/core">
<transportConnectors>
<transportConnector uri="tcp://localhost:62001"/>
</transportConnectors>

2
activemq-core/src/test/resources/org/apache/activemq/broker/ft/slave.xml
View File

@ -18,7 +18,7 @@
<beans>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"/>
<broker brokerName="slave" useJmx="false" masterConnectorURI="tcp://localhost:62001" xmlns="http://activemq.apache.org/schema/core">
<broker brokerName="slave" deleteAllMessagesOnStartup="true" useJmx="false" masterConnectorURI="tcp://localhost:62001" xmlns="http://activemq.apache.org/schema/core">
<transportConnectors>
<transportConnector uri="tcp://localhost:62002"/>
</transportConnectors>