Hello everyone :) I hope I'm right here with a question about the org.apache.activemq:artemis-jms-client:2.20.0 I'm fairly new to that.
I need to subscribe to an already existing multicast-queue (I have a service-migration that should take over the subscription of an already subscribed service which will then get shut down) and I tried that using the FQQN like this: //PREPARATIONS: create a multicast-queue named queueNameThatAlreadyExists under the address TESTADRESS ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory("tcp://127.0.0.1:61616"); cf.setClientID("clientID"); Connection connection = cf.createConnection(); connection.start(); Session session = connection.createSession(); Topic topic = session.createTopic("TESTADRESS::queueNameThatAlreadyExists"); session.createDurableSubscriber(topic, "subscriptionName", null, false); This unfortunately triggers the following exception: Exception in thread "main" javax.jms.InvalidDestinationException: AMQ229019: Queue queueNameThatAlreadyExists already exists on address TESTADRESS at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:549) at org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl.sendBlocking(ChannelImpl.java:443) at org.apache.activemq.artemis.core.protocol.core.impl.ActiveMQSessionContext.createQueue(ActiveMQSessionContext.java:821) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.internalCreateQueue(ClientSessionImpl.java:2054) at org.apache.activemq.artemis.core.client.impl.ClientSessionImpl.createQueue(ClientSessionImpl.java:307) at org.apache.activemq.artemis.jms.client.ActiveMQSession.createQueue(ActiveMQSession.java:1274) at org.apache.activemq.artemis.jms.client.ActiveMQSession.createConsumer(ActiveMQSession.java:878) at org.apache.activemq.artemis.jms.client.ActiveMQSession.createDurableSubscriber(ActiveMQSession.java:598) at Main.main(Main.java:18) Caused by: ActiveMQQueueExistsException[errorType=QUEUE_EXISTS message=AMQ229019: Queue queueNameThatAlreadyExists already exists on address TESTADRESS] ... 9 more I debugged it a little and it seems like in here: https://github.com/apache/activemq-artemis/blob/main/artemis-jms-client/src/main/java/org/apache/activemq/artemis/jms/client/ActiveMQSession.java I think starting from Line 872 lies the reason: the existence of the multicast queue gets checked with a queueQuery using a queuename of pattern clientID.subscriptionName, which of course does not exist and subsequently tries to create a queue with the queueName taken from the FQQN ... which does exist ... I think that shouldn't happen. I've found no solutions on the internet and on the mailing list, do you have any ideas ? Would a bug ticket be justified here ? Thanks a lot for your help :D