Hi Luca,
I seen some examples from customers using "jboss.as|hornetq*jms-queue*"
That also seems to map with what I found with a web search.
Have you tried to use jconsole to view the mbean key names?
Do any other community users have HornetQ JMX experience they can share with Luca?
Thanks
Lynn
P.S.
Looks like HornetQ has been replaced with Apache ActiveMQ Artemis in JBoss EAP 7 & Wildfly 10.1
Part I. About Messaging and JBoss EAP 7 - Red Hat Customer Portal