If I understand the API documentation of the interfaces you mention (StubDelegate), it is not necessary to implement them. They seem to be available in case you want to override the behaviour of the "Util" and "Stub" classes. I guess JacOrb is happy with the default implentation of those classes and they have no need to implement the interfaces.
Joined: Jul 24, 2005
When a corbar client(jacorb) visits Jacorb server with default RMI implementation in JDK, a exception has been thrown as below: