If I want to add observers to zookeeper cluster, why is it required to have observers in the Quorum participant's configuration list ? We can start observers without having them in the participant's configuration list and leader still forwards them transactions. If I am not wrong, when a follower / observer joins the quorum, leader communicates to it about its leadership and follower/ observer makes sure that majority is following the leader. That makes it necessary to have all the participants in observers configuration list. But is it really required for a) participants to know about observers ? b) observers to know about other observers ?
