Github user enixon commented on the issue:
https://github.com/apache/zookeeper/pull/545
@anmolnar quick question - my understanding of secure client connections
is that the QuorumPeer maintains two ports simultaneously so that clients can
be slowly migrated from one to the other. This patch means only connections to
one of those ports is visible from the ZooKeeperServer so what happens to
connections on the other port? Are they still made and just not registered?---
