RabbitMQ is a messaging broker—an intermediary for messaging. It gives your applications a common platform to send and receive messages, and your messages a safe place to live until they are received.
Make sure you have taken care of the fact that short names are also included in the /etc/hosts file as shown in the following code:
<ip address1> <hostname1> <shortname1> <ip address2> <hostname2> <shortname2>
Note
Short names in /etc/hosts are mandatory because in a RabbitMQ cluster, the internode communication happens using these short names.
For example, we have two machines in our cluster with the following mentioned IPs and hostnames; this information is used by the RabbitMQ daemons while starting the cluster:
10.191.206.83 rmq-flc-1.mydomain.net rmq-flc-1 10.73.10.63 rmq-flc-2.mydomain.net rmq-flc-2
If the short names are not set, you will see this error: System NOT...