Comment 4 for bug 1488166

So, secure in the knowledge that it *can* happen, I'm still looking; but there's nothing to indicate where the missing link is; so, if you ever come across it again, please:

  * set logging config to contain `juju.worker.leadership=DEBUG;juju.state.leadership=TRACE;state.lease=TRACE` in addition to whatever else you usually use
  * let it run for 60s or so to capture whatever's happening to begin with
  * bounce the affected unit agent, see if the unit gets elected (will happen within a few seconds or not at all)
  * bounce the state server, see if the unit gets elected (similarly)

...and post the logs for the state server and the unit agent to the bug.