The Java Client API Guide provides examples of how to create a connectionFactory instance using multiple RabbitMQ nodes in a cluster. The connectionFactory will establish a connection with the first host in the list which is available.
This functionality has not been used in the ConsumeAMQP or PublishAMQP processors.
It would be convenient to be able to provide a comma-delimitted list in the Host Name Processor property.
EDIT: I have implemented the ticket by using an additional property for the comma-delimited list of hosts in order to not break backward compatibility.