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Mate Szalay-Beko commented on ZOOKEEPER-2164: --------------------------------------------- OK, sure. I just pushed the PR [https://github.com/apache/zookeeper/pull/1254] [~suhas.dantkale], can you take a look? > fast leader election keeps failing > ---------------------------------- > > Key: ZOOKEEPER-2164 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2164 > Project: ZooKeeper > Issue Type: Bug > Components: leaderElection > Affects Versions: 3.4.5 > Reporter: Michi Mutsuzaki > Assignee: Mate Szalay-Beko > Priority: Major > Labels: pull-request-available > Fix For: 3.7.0, 3.5.8 > > Time Spent: 10m > Remaining Estimate: 0h > > I have a 3-node cluster with sids 1, 2 and 3. Originally 2 is the leader. > When I shut down 2, 1 and 3 keep going back to leader election. Here is what > seems to be happening. > - Both 1 and 3 elect 3 as the leader. > - 1 receives votes from 3 and itself, and starts trying to connect to 3 as a > follower. > - 3 doesn't receive votes for 5 seconds because connectOne() to 2 doesn't > timeout for 5 seconds: > https://github.com/apache/zookeeper/blob/41c9fcb3ca09cd3d05e59fe47f08ecf0b85532c8/src/java/main/org/apache/zookeeper/server/quorum/QuorumCnxManager.java#L346 > - By the time 3 receives votes, 1 has given up trying to connect to 3: > https://github.com/apache/zookeeper/blob/41c9fcb3ca09cd3d05e59fe47f08ecf0b85532c8/src/java/main/org/apache/zookeeper/server/quorum/Learner.java#L247 > I'm using 3.4.5, but it looks like this part of the code hasn't changed for a > while, so I'm guessing later versions have the same issue. -- This message was sent by Atlassian Jira (v8.3.4#803005)