I tried deleting the contents of the <JBOSS>/server/all/data folder and the problem seems to be disappeared.
Is that acceptable? I know by deleting the journals I have lost all the yet to be delivered messages, it's fine with my current situation, but I am not sure if there is a better way.
When a durable subscription is created on a topic that subscription is saved in the HornetQ journal (in the "bindings" section specifically) so that the subscription survives a server crash/restart. That is why it stays around even if you change the name of the topic. As for why you're getting that specific message I can't say exactly. What is "DefaultMessageListenerContainer"? What is it doing and why is it doing it when it receives that message?