Issue: ======= As per the rabbitmq is started in nodec2 and nodec3 at the same time, which caused two different clusters. NODEC2 LOGS =========== root@nodec2(controller):/# cat /var/log/rabbitmq/rabbit\@nodec2.log =INFO REPORT==== 19-Sep-2017::12:41:10 === Starting RabbitMQ 3.5.7 on Erlang 18.3 Copyright (C) 2007-2015 Pivotal Software, Inc. Licensed under the MPL. See http://www.rabbitmq.com/ =INFO REPORT==== 19-Sep-2017::12:41:10 === node : rabbit@nodec2 home dir : /var/lib/rabbitmq config file(s) : /etc/rabbitmq/rabbitmq.config cookie hash : tBHK3P2Wa419qrcxZV75DQ== log : /