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Posted to issues@activemq.apache.org by "Lin Gao (JIRA)" <ji...@apache.org> on 2018/02/09 06:23:00 UTC
[jira] [Created] (ARTEMIS-1670) NPE was found in when dropping
durable subscriptions from a topic
Lin Gao created ARTEMIS-1670:
--------------------------------
Summary: 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
In WildFly, set up a topic by executing following CLI:
{code:java}
/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/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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