This bug is back again in cs:xenial/rabbitmq-server-54.

2016-10-22 12:32:49 INFO juju-log Changing perms of path /var/lib/rabbitmq
2016-10-22 12:32:49 INFO juju-log getting local nodename for ip address: 10.42.129.252
2016-10-22 12:32:49 INFO juju-log local nodename: eth3
2016-10-22 12:32:49 INFO juju-log configuring nodename
2016-10-22 12:32:50 INFO juju-log forcing nodename=eth3
2016-10-22 12:32:50 INFO juju-log Stopping rabbitmq-server.
2016-10-22 12:32:50 INFO juju-log Updating /etc/rabbitmq/rabbitmq-env.conf, RABBITMQ_NODENAME=rabbit@eth3
2016-10-22 12:32:50 INFO juju-log Starting rabbitmq-server.
2016-10-22 12:32:50 INFO config-changed Job for rabbitmq-server.service failed because the control process exited with error code. See "systemctl status rabbitmq-server.service" and "journalctl -xe" for details.
2016-10-22 12:32:50 INFO juju-log getting local nodename for ip address: 10.42.129.252
2016-10-22 12:32:50 INFO juju-log local nodename: eth3
2016-10-22 12:32:50 DEBUG juju-log Waiting for rabbitmq app to start: /<email address hidden>
2016-10-22 12:32:50 DEBUG juju-log Running ['timeout', '180', '/usr/sbin/rabbitmqctl', 'wait', '/<email address hidden>']
2016-10-22 12:32:51 INFO config-changed Waiting for rabbit@eth3 ...
2016-10-22 12:32:51 INFO config-changed pid is 11926 ...
2016-10-22 12:32:51 INFO config-changed Error: process_not_running
2016-10-22 12:32:51 INFO config-changed Error: unable to connect to node rabbit@eth3: nodedown
2016-10-22 12:32:51 INFO config-changed
2016-10-22 12:32:51 INFO config-changed DIAGNOSTICS
2016-10-22 12:32:51 INFO config-changed ===========
2016-10-22 12:32:51 INFO config-changed
2016-10-22 12:32:51 INFO config-changed attempted to contact: [rabbit@eth3]
2016-10-22 12:32:51 INFO config-changed
2016-10-22 12:32:51 INFO config-changed rabbit@eth3:
2016-10-22 12:32:51 INFO config-changed   * unable to connect to epmd (port 4369) on eth3: nxdomain (non-existing domain)
2016-10-22 12:32:51 INFO config-changed
2016-10-22 12:32:51 INFO config-changed
2016-10-22 12:32:51 INFO config-changed current node details:
2016-10-22 12:32:51 INFO config-changed - node name: 'rabbitmq-cli-12279@juju-ebcca1-0-lxd-2'
2016-10-22 12:32:51 INFO config-changed - home dir: /var/lib/rabbitmq
2016-10-22 12:32:51 INFO config-changed - cookie hash: kpajU/F+sdPkKp79KbzF2A==
2016-10-22 12:32:51 INFO config-changed
2016-10-22 12:32:51 INFO config-changed Traceback (most recent call last):
2016-10-22 12:32:51 INFO config-changed   File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/config-changed", line 765, in <module>
2016-10-22 12:32:51 INFO config-changed     hooks.execute(sys.argv)
2016-10-22 12:32:51 INFO config-changed   File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/charmhelpers/core/hookenv.py", line 715, in execute
2016-10-22 12:32:51 INFO config-changed     self._hooks[hook_name]()
2016-10-22 12:32:51 INFO config-changed   File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/rabbit_utils.py", line 764, in wrapped_f
2016-10-22 12:32:51 INFO config-changed     f(*args, **kwargs)
2016-10-22 12:32:51 INFO config-changed   File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/charmhelpers/contrib/hardening/harden.py", line 79, in _harden_inner2
2016-10-22 12:32:51 INFO config-changed     return f(*args, **kwargs)
2016-10-22 12:32:51 INFO config-changed   File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/config-changed", line 693, in config_changed
2016-10-22 12:32:51 INFO config-changed     configure_nodename()
2016-10-22 12:32:51 INFO config-changed   File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/config-changed", line 145, in configure_nodename
2016-10-22 12:32:51 INFO config-changed     rabbit.wait_app()
2016-10-22 12:32:51 INFO config-changed   File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/rabbit_utils.py", line 353, in wait_app
2016-10-22 12:32:51 INFO config-changed     raise ex
2016-10-22 12:32:51 INFO config-changed subprocess.CalledProcessError: Command '['timeout', '180', '/usr/sbin/rabbitmqctl', 'wait', '/<email address hidden>']' returned non-zero exit status 2
2016-10-22 12:32:51 ERROR juju.worker.uniter.operation runhook.go:107 hook "config-changed" failed: exit status 1