amq.gen-* verified
A node's private queue
The anonymous queue each node binds to the cluster exchange to receive announcements.
In detail
Easy to mistake for leftover rubbish when reading a queue list: an amq.gen-… name with one consumer and no messages. It is the node's own ear on the cluster, recreated with a new name on every restart. Practical use: its presence means the engine has a live connection to the cluster exchange. Its absence on a node that should be clustered is a real finding.