Comment 1 for bug 1573030

My current working theory is that when the joining nodes attempt to join the first node and form a cluster, they are all doing it at exactly the same time. This is possibly causing a race where they attempt to sync from each other, but because they have not synced from the master yet they have database mnesia inconsistencies and the join fails (it shouldn't hang, but you know, rabbitmq).

Probably need a separate play for the primary node, then a separate play for joiners set to use serial so they join one at a time. Or something else that makes them join one at a time (you can't just serialise one task apparently).

Will update more if I confirm this theory