AQ Client Acknowledge not working

 

Hi I noticed some strange behaviour with Oracle AQ and the Client_Acknowledge on the session (using standard JMS API's) I created the session as follows Session session = connection.createQueueSession(false, Session.CLIENT_ACKNOWLEDGE); And in my listener I am acknowledging the message as follows if (session.getAcknowledgeMode() == Session.CLIENT_ACKNOWLEDGE) { message.acknowledge(); } But, when I restart my server, the messages still exist on the queue. Is there anything that needs to be setup on the queue itself to enable Client_Acknowledge? I tried the same code with Auto_ACknowledge and it works as expected Any help getting Client_Acknowledge working is greatly appreciated