Thank you for your prompt I set the useJMX=true, the warning message disappears.
and i dont know why... -- View this message in context: http://activemq.2283324.n4.nabble.com/Using-Broker-clusters-javax-management-InstanceAlreadyExistsException-xx-tp4698127p4698547.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.