Comment 4 for bug 1828988

I have partially reproduced this with a much smaller bundle:

series: bionic
applications:
  rabbitmq-server:
    charm: cs:rabbitmq-server-89
    num_units: 3
    options:
      min-cluster-size: 3

I only saw this error on one of the three units, making me think that this may be an issue where the units coming up take too long to see each other, so the first one to come up gives up and dies.