https://issues.apache.org/jira/browse/AMQ-6059

Ensure that a message sent to the store for the DLQ is rewritten so that
its updated values are written to prevent exirpation loops and loss of
reollback cause etc.

activemq-broker/src/main/java/org/apache/activemq/util/BrokerSupport.java

@@ -56,6 +56,7 @@ public final class BrokerSupport {
         message.setTransactionId(null);
         message.setMemoryUsage(null);
         message.setRedeliveryCounter(0);
+        message.getMessageId().setDataLocator(null);
         boolean originalFlowControl = context.isProducerFlowControl();
         try {
             context.setProducerFlowControl(false);

activemq-unit-tests/src/test/java/org/apache/activemq/bugs/AMQ6059Test.java

@@ -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 static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.util.Enumeration;
+import java.util.concurrent.TimeUnit;
+
+import javax.jms.Connection;
+import javax.jms.DeliveryMode;
+import javax.jms.Destination;
+import javax.jms.JMSException;
+import javax.jms.Message;
+import javax.jms.MessageProducer;
+import javax.jms.Queue;
+import javax.jms.QueueBrowser;
+import javax.jms.Session;
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+
+import org.apache.activemq.ActiveMQConnectionFactory;
+import org.apache.activemq.broker.BrokerService;
+import org.apache.activemq.broker.jmx.QueueViewMBean;
+import org.apache.activemq.broker.region.policy.PolicyEntry;
+import org.apache.activemq.broker.region.policy.PolicyMap;
+import org.apache.activemq.broker.region.policy.SharedDeadLetterStrategy;
+import org.apache.activemq.command.ActiveMQQueue;
+import org.apache.activemq.leveldb.LevelDBStore;
+import org.apache.activemq.util.IOHelper;
+import org.apache.activemq.util.Wait;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Once the wire format is completed we can test against real persistence storage.
+ */
+public class AMQ6059Test {
+
+    private static final Logger LOG = LoggerFactory.getLogger(AMQ6059Test.class);
+
+    private BrokerService broker;
+
+    @Before
+    public void setUp() throws Exception {
+        broker = createBroker();
+        broker.start();
+        broker.waitUntilStarted();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        if (broker != null) {
+            broker.stop();
+            broker.waitUntilStopped();
+        }
+    }
+
+    @Test
+    public void testDLQRecovery() throws Exception {
+
+        sendMessage(new ActiveMQQueue("leveldbQueue"));
+        TimeUnit.SECONDS.sleep(3);
+
+        LOG.info("### Check for expired message moving to DLQ.");
+
+        Queue dlqQueue = (Queue) createDlqDestination();
+        verifyIsDlq(dlqQueue);
+
+        final QueueViewMBean queueViewMBean = getProxyToQueue(dlqQueue.getQueueName());
+
+        assertTrue("The message expired", Wait.waitFor(new Wait.Condition() {
+            @Override
+            public boolean isSatisified() throws Exception {
+                LOG.info("DLQ stats: Enqueues {}, Dispatches {}, Expired {}, Inflight {}",
+                    new Object[] { queueViewMBean.getEnqueueCount(),
+                                   queueViewMBean.getDispatchCount(),
+                                   queueViewMBean.getExpiredCount(),
+                                   queueViewMBean.getInFlightCount()});
+                return queueViewMBean.getEnqueueCount() == 1;
+            }
+        }));
+
+        verifyMessageIsRecovered(dlqQueue);
+        restartBroker(broker);
+        verifyMessageIsRecovered(dlqQueue);
+    }
+
+    protected BrokerService createBroker() throws Exception {
+        return createBrokerWithDLQ(true);
+    }
+
+    private BrokerService createBrokerWithDLQ(boolean purge) throws Exception {
+        BrokerService broker = new BrokerService();
+
+        File directory = new File("target/activemq-data/leveldb");
+        if (purge) {
+            IOHelper.deleteChildren(directory);
+        }
+
+        LevelDBStore levelDBStore = new LevelDBStore();
+        levelDBStore.setDirectory(directory);
+        if (purge) {
+            levelDBStore.deleteAllMessages();
+        }
+
+        PolicyMap pMap = new PolicyMap();
+
+        SharedDeadLetterStrategy sharedDLQStrategy = new SharedDeadLetterStrategy();
+        sharedDLQStrategy.setProcessNonPersistent(true);
+        sharedDLQStrategy.setProcessExpired(true);
+        sharedDLQStrategy.setDeadLetterQueue(new ActiveMQQueue("ActiveMQ.DLQ"));
+        sharedDLQStrategy.setExpiration(10000);
+
+        PolicyEntry defaultPolicy = new PolicyEntry();
+        defaultPolicy.setDeadLetterStrategy(sharedDLQStrategy);
+        defaultPolicy.setExpireMessagesPeriod(2000);
+        defaultPolicy.setUseCache(false);
+
+        pMap.put(new ActiveMQQueue(">"), defaultPolicy);
+        broker.setDestinationPolicy(pMap);
+        broker.setPersistenceAdapter(levelDBStore);
+        if (purge) {
+            broker.setDeleteAllMessagesOnStartup(true);
+        }
+
+        return broker;
+    }
+
+    private void restartBroker(BrokerService broker) throws Exception {
+        broker.stop();
+        broker.waitUntilStopped();
+        broker = createBrokerWithDLQ(false);
+        broker.start();
+        broker.waitUntilStarted();
+    }
+
+    private void verifyMessageIsRecovered(final Queue dlqQueue) throws Exception, JMSException {
+        Connection connection = createConnection();
+        connection.start();
+        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
+        QueueBrowser browser = session.createBrowser(dlqQueue);
+        Enumeration<?> elements = browser.getEnumeration();
+        assertTrue(elements.hasMoreElements());
+        Message browsed = (Message) elements.nextElement();
+        assertNotNull("Recover message after broker restarts", browsed);
+    }
+
+    private void sendMessage(Destination destination) throws Exception {
+        Connection connection = createConnection();
+        connection.start();
+        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
+        MessageProducer producer = session.createProducer(destination);
+        producer.send(destination, session.createTextMessage("DLQ message"), DeliveryMode.PERSISTENT, 4, 1000);
+        connection.stop();
+        LOG.info("### Send message that will expire.");
+    }
+
+    private Connection createConnection() throws Exception {
+        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(broker.getVmConnectorURI());
+        return factory.createConnection();
+    }
+
+    private Destination createDlqDestination() {
+        return new ActiveMQQueue("ActiveMQ.DLQ");
+    }
+
+    private void verifyIsDlq(Queue dlqQ) throws Exception {
+        final QueueViewMBean queueViewMBean = getProxyToQueue(dlqQ.getQueueName());
+        assertTrue("is dlq", queueViewMBean.isDLQ());
+    }
+
+    private QueueViewMBean getProxyToQueue(String name) throws MalformedObjectNameException, JMSException {
+        ObjectName queueViewMBeanName = new ObjectName(
+            "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=Queue,destinationName=" + name);
+        QueueViewMBean proxy = (QueueViewMBean) broker.getManagementContext().newProxyInstance(
+            queueViewMBeanName, QueueViewMBean.class, true);
+        return proxy;
+    }
+}