HornetQ interceptors are not supported by the messaging subsystem.

Their attributes are handled by the XML parser but they are not set when adding the HornetQ server instance.
Moreover, passing the interceptor class name is not enough. Since they are loaded by HornetQ, its classloader must be able to access them. The interceptors must be put in a JBoss module that is declared as a transitive dependency of org.hornetq module.