Comment 7 for bug 1787110

In fact on Xenial the default setup as one can check via:
$ rabbitmqctl add_user full_access secret
Creating user "full_access"
$ rabbitmqctl set_user_tags full_access administrator
Setting tags for user "full_access" to [administrator]
# web browse to <IP>:15672 then and we will find 1 socket on the xenial install used, but 0 on the other releases

But there is no connection open (as usually you'd close the connection to free up socket descriptors).

Checking a remote server that has zero sockets for now has other issues (timeouts).
But since we know the same bug is in all lets fix Xenial as well, even if it is harder to recreate there.