Move of mbeans related to RMI Classloading out of conf/jboss-service.xml and into deploy/ has broken things. HttpRMIClassLoading (aka jboss:service=WebService) needs to start before any other services export an RMI object or create a MarshalledObject. If it doesn't, some static initializers in the JDK java.rmi implementation will not see the correct values. So add dependencies.
Ones I'm aware of are RemoteNamingBean, UnifiedInvoker(HA), JRMPInvoker(HA).