Objects activated on CORBABean rootPOA cannot have methods invoked.

It is possible to retrieve a CORBABean-defined ORB instance by using lookup on "java:comp/ORB". If the rootPOA of that ORB instance is used to activate an object, it's not possible to call any methods on that object because the ServerTransactionInterceptor will not find a TransactionPolicy defined on the rootPOa and throw an exception. This interceptor just needs to ignore the request in this situation.