Supervisor restart ends in an inactive actor: messages sent to dead letter

I think I have figured this out. Once the only peer-node goes down, I have in effect a split pair of clusters when a seed goes up again. The questions then are:

  1. Detecting when the cluster split
  2. Rejoining the clusters

Has anyone had to deal with such issues? If so, is their any literature or example about this?

EDIT:

Found this: Nodes not rejoining after cluster spilt
TIA