Another way you could eliminate this problem (without turning off JMX) is to change your log4j configuration to set the logging level to ERROR for org.apache.activemq.network.MBeanBridgeDestination. You run the risk of not seeing errors in MBean creation due to other reasons, but in practice the odds of that are unlikely so there's really not much of a cost, and I think that's better than disabling JMX entirely. Just remember to set it back once you upgrade to a version where the bug is fixed.
Tim On Wed, Jan 13, 2016 at 9:22 PM, Tim Bain <tb...@alumni.duke.edu> wrote: > I'd definitely expect that turning off JMX would eliminate the problem, > since the issue happens when creating the objects JMX uses. I'm skeptical > that scheduler support would cause this problem if JMX support is disabled, > and skeptical that turning it off would eliminate the problem if JMX is > enabled, so basically I expect that useJmx is the only setting you need to > change, not both of them. > > However, running without JMX support makes it much harder to diagnose > issues in your broker if you experience them, so I'm not sure I'd choose to > turn off JMX support rather that just live with a noisy log file; log lines > that you know aren't a problem are easy to filter our or ignore, and I'd > rather have JMX available if something starts not working, but it's your > choice. > > Either way, I'd plan to upgrade to 5.14.0 when it's released, at which > point you should definitely re-enable JMX support. > > Tim > > On Wed, Jan 13, 2016 at 6:25 PM, softwbc <soft...@163.com> wrote: > >> I try the default configuration for ActiveMQ. >> Now,I fount that the following two parameters could cause this problem: >> useJmx="true" schedulerSupport="true" >> When this configuration is removed,no warn has occurred. So far. >> >> but, Previously I tried to change to false. >> >> Thanks for your help. >> >> >> >> -- >> View this message in context: >> http://activemq.2283324.n4.nabble.com/Using-Broker-clusters-javax-management-InstanceAlreadyExistsException-xx-tp4698127p4705974.html >> Sent from the ActiveMQ - User mailing list archive at Nabble.com. >> > >
