I could reproduce the problem. Following situation: Producer(Client) Consumer(Server) NetworkConnector
I shutdown the consumer and the producer get messages further. If I start the connection between producer and consumer again then at first I see the following exception in activemq log: Async error occurred: java.lang.IllegalArgumentException: The subscription does not exist: ID:n11-1681-1159779699684-5:1:1:1 and then some of the messages which deliver to the consumer stuck in queue. -- View this message in context: http://activemq.2283324.n4.nabble.com/Messages-stuck-in-queue-tp3244342p3447220.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.