If one runs with the jdk5 java.rmi.server.ignoreStubClasses dynamic stub override to force the server to generate stubs for exported objects, the JRMPInvoker fails to start with the following exception:

[starksm@succubus bin]$ run.sh -D-Djava.rmi.server.ignoreStubClasses=true
=========================================================================

...

11:55:52,477 WARN [ServiceController] Problem starting service jboss:service=invoker,type=jrmp
java.lang.ClassCastException: $Proxy13
at org.jboss.invocation.jrmp.server.JRMPInvoker.exportCI(JRMPInvoker.java:437)
at org.jboss.invocation.jrmp.server.JRMPInvoker.startService(JRMPInvoker.java:359)
at org.jboss.invocation.jrmp.server.JRMPInvoker$1.startService(JRMPInvoker.java:136)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:274)

The reason is that the code creating the remote object is explictly casting the export result to a RemoteStub:

protected void exportCI() throws Exception

{ this.invokerStub = (RemoteStub) UnicastRemoteObject.exportObject (this, rmiPort, clientSocketFactory, serverSocketFactory); }

even though the public contract for this stub only requires a Serializable instance. The type of the invokerStub should just be relaxed to Serializable.