Starting the Subscriber and Publisher Clients

Start the subscribers, as described in Starting the Subscriber Clients. Note that you cannot start user1 as a subscriber because user1 has permission to publish, but not to subscribe. As a result, you receive an exception message including the statement:

   Operation not permitted.

User2 should start as a subscriber in the same manner as before.

You can now start user1 as the publisher and send messages to user2, as described in Starting the Publisher Client and Sending Messages.