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https://issues.apache.org/jira/browse/ARTEMIS-1670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16358443#comment-16358443
]
ASF subversion and git services commented on ARTEMIS-1670:
----------------------------------------------------------
Commit 3e212c09db04e22c76d443bede5ac00a2c86ba6a in activemq-artemis's branch
refs/heads/1.x from Lin Gao
[ https://git-wip-us.apache.org/repos/asf?p=activemq-artemis.git;h=3e212c0 ]
[ARTEMIS-1670] NPE was found in when dropping durable subscriptions from a topic
> NPE was found in when dropping durable subscriptions from a topic
> -----------------------------------------------------------------
>
> Key: ARTEMIS-1670
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1670
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: Broker
> Affects Versions: 1.5.5
> Reporter: Lin Gao
> Priority: Major
> Fix For: 1.5.6
>
>
> In WildFly, set up a topic by executing following CLI:
> {code:java}
> /subsystem=messaging-activemq/server=default:write-attribute(name=security-enabled,value=false)
> :reload
> /subsystem=messaging-activemq/server=default/jms-topic=testTopic:add(entries=[java:/jms/topic/testTopic,
> java:jboss/exported/jms/topic/testTopic])
> {code}
> Then create a durable subscriber on it using the following test code:
>
> {code:java}
> public static void main(String[] args) throws Exception {
> Connection connection = null;
> Context namingContext = null;
> try {
> final Properties env = new Properties();
> env.put(Context.INITIAL_CONTEXT_FACTORY,
> "org.wildfly.naming.client.WildFlyInitialContextFactory");
> env.put(Context.PROVIDER_URL,
> System.getProperty(Context.PROVIDER_URL, "http-remoting://127.0.0.1:8080"));
> namingContext = new InitialContext(env);
> Topic topic = (Topic)
> namingContext.lookup("/jms/topic/testTopic");
> ConnectionFactory connectionFactory = (ConnectionFactory)
> namingContext.lookup("jms/RemoteConnectionFactory");
> connection = connectionFactory.createConnection();
> connection.setClientID("durable-client");
> connection.start();
> Session session = connection.createSession(false,
> Session.AUTO_ACKNOWLEDGE);
> MessageProducer messageProducer = session.createProducer(topic);
> TopicSubscriber subscriber =
> session.createDurableSubscriber(topic, "subscriber-1");
> TextMessage message1 = session.createTextMessage("This is a text
> message 1");
> messageProducer.send(message1);
> System.out.println("Sent message: " + message1.getText());
> TextMessage messageReceived = (TextMessage) subscriber.receive();
> System.out.println("Received message: " +
> messageReceived.getText());
> try {
> Thread.sleep(20000); // wait 20 seconds before
> un-subscribe
> } catch (InterruptedException e) {
> e.printStackTrace();
> }
> subscriber.close();
> session.unsubscribe("subscriber-1");
> } finally {
> if (connection != null) {
> connection.close();
> }
> if (namingContext != null) {
> namingContext.close();
> }
> }
> }
> {code}
>
> The code above will sleep 20 seconds before un-subscribe, try to execute the
> following WildFly CLI within 20 seconds:
> {code:java}
> /subsystem=messaging-activemq/server=default/jms-topic=testTopic:drop-durable-subscription(client-id=durable-client,
> subscription-name=subscriber-1)
> {code}
>
> The WildFly CLI succeeded, but there is a NPE in the server log:
> {code:java}
> 09:10:42,340 ERROR [org.apache.activemq.artemis.core.server] (Thread-3
> (ActiveMQ-server-org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl$3@7ba46694))
> AMQ224065: Failed to remove auto-created queue
> testSubscriberClientIdjmsTopicOperations.testSubscriber:
> java.lang.NullPointerException
> at
> org.apache.activemq.artemis.jms.server.impl.JMSServerManagerImpl$JMSQueueDeleter.delete(JMSServerManagerImpl.java:1669)
> [artemis-jms-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.core.server.impl.AutoCreatedQueueManagerImpl$1.run(AutoCreatedQueueManagerImpl.java:36)
> [artemis-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.utils.ReferenceCounterUtil.decrement(ReferenceCounterUtil.java:54)
> [artemis-commons-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.core.server.impl.AutoCreatedQueueManagerImpl.decrement(AutoCreatedQueueManagerImpl.java:58)
> [artemis-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.core.server.impl.QueueImpl.removeConsumer(QueueImpl.java:786)
> [artemis-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.removeItself(ServerConsumerImpl.java:496)
> [artemis-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.close(ServerConsumerImpl.java:443)
> [artemis-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.core.server.impl.ServerSessionImpl.closeConsumer(ServerSessionImpl.java:1174)
> [artemis-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.core.protocol.core.ServerSessionPacketHandler.internalHandlePacket(ServerSessionPacketHandler.java:445)
> [artemis-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.core.protocol.core.ServerSessionPacketHandler.lambda$handlePacket$0(ServerSessionPacketHandler.java:211)
> [artemis-server-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> org.apache.activemq.artemis.utils.OrderedExecutorFactory$OrderedExecutor$ExecutorTask.run(OrderedExecutorFactory.java:122)
> [artemis-commons-1.5.5.008-redhat-1.jar:1.5.5.008-redhat-1]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> [rt.jar:1.8.0_151]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> [rt.jar:1.8.0_151]
> at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_151]
> {code}
> Despite this error, *subscription is removed* and listing of all
> subscriptions is now empty. Operation works as expected, however there is an
> Error logged on server side.
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