Resolution:
TIBCO Rendezvous does not support clusters, the reason being the TIBCO Rendezvous daemon obtains interface information only at start-up, and therefore it will not operate correctly in an environment where the interface binding may change dynamically.

However, TIBCO Rendezvous CAN be used in a clustered environment:

In order to use TIBCO Rendezvous in a clustered environment, start rvd on each of the hosts making up the cluster.  Since TIBCO applications communicate with their rvd using a socket, when an application dies on one host and is brought back up on another host, the new instantiation of the application will bind with the rvd on the new host and start publishing/subscribing again.

Therefore, you will need to have rvd already running on each host in the cluster.  During failover the application restarting on the new host will connect to the existing rvd on that new host.