ActiveMQ 5.2 is not officially supported by Hyperic HQ 4.1.x, based on the documentation. As such, it is not auto discovered. It appears that support has been added to the 4.2 release of Hyperic (http://jira.hyperic.com/browse/HHQ-3091). Until then, is there a way to coerce Hyperic into monitoring AcitveMQ 5.2?