​Recently, carried out a test to to find the behavior of clients when a client is partitioned from the ensemble.
Here I used a ensemble of 3 zookeeper servers called A, B and C. And quorum was set up like below. A - Follower B - Leader C - Follower​ A <---> B <---> C \____________/ And 3 clients are connected to ensemble like below. C1 is connected A C2 is connected B C3 is connected C. I used iptables to remove the network link between B and C. command used: iptables -I INPUT -s 123.123.45.123 -j DROP After removing the link connections looks like below. A <----> B C \____________/ Simply there is no way to communicate from B to C and vice versa. Here What I noticed is that the client connected to Zookeeper Server "C", could not connect to the ensemble resulting a session expiration timeout. For this experiment I used tickTime of 3000ms and client session expiration timeout of 45000ms. And tested with different combinations also. Can someone please explain what is the root cause for this behavior?
