I’ve question regarding “Paxos Principal node”. Under the info Header in the link below, there is a sentence goes that: “You will also notice that one node name is always green, this node is the node expected to be the Paxos Principal node.”. I couldn’t find any more info about “Paxos Principal node”, could someone explain it in details? do we have a specific node like the name node in hadoop? How is it relate to Paxos protocols?