java.rmi.server.UnicastRemoteObject.exportObject(Remote) method has a different
behavior in JDK 1.1.6 than in previous JDKs. If method is called more than once
JDK 1.1.6 triggers an exception, this was not happending before. The method is been called to get a reference to the actual Stub, there is not other way in the
JDK API to get a reference to the Stub than calling this method (this method is
first called in the UnicastRemoteObject constructor, making impossible to get
a reference to the Stub).