Comment 17 for bug 1664025

> However, I would expect the follower units to have been started normally, and not be part of the unit cgroup - so only the lead unit should see this effect.

Right. A quick workaround for this issue is rebooting the leader unit after cluster gets up and running with multiple units so mysqld will be spawned outside of the process tree of juju unit daemon.

I saw this issue at a customer site as one of three mysqld gets down suddenly on agent upgrade.