RabbitMQ Cluster Node Missing

While starting RabbitMQ cluster start one node first and wait for it to be up and running (Use “ae status” command to check if RabbitMQ is started). Once one node is started you can start all other nodes at same time.

This is to avoid race condition among RabbitMQ node. Please check following link for more details.

https://www.rabbitmq.com/cluster-formation.html#initial-formation-race-condition

If you have already started the nodes. Then stop all the running nodes except one and on the server where RabbitMQ is stopped delete “nodes_running_at_shutdown” file at location “<<RPA Image>>\ data\Messaging\db\<<CLUSTER_NAME>>@<<MACHINE NAME>>-mnesia” and then restart RabbitMQ.