Github user lvfangmin commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/588#discussion_r207604429
--- Diff:
src/java/main/org/apache/zookeeper/server/quorum/FastLeaderElection.java ---
@@ -86,6 +86,7 @@
QuorumCnxManager manager;
+ private SyncedLearnerTracker leadingVoteSet;
--- End diff --
It is used to pass into the Leader after the Leader instance is constructed.---
