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From Ruifang Ge <ruifang...@facebook.com>
Subject Zookeeper leader stop and restart question
Date Mon, 01 Nov 2010 19:09:23 GMT
Hi,

I started a 5-node zookeeper cluster, then killed the leader (leader1).  One of the other
server became the new leader(leader2).  After that, I restarted the former leader (leader1),
and it failed to be connected from zkCli.  Does anyone have some idea about this?

Leader1:

2010-10-30 07:34:08,546 [QuorumPeer:/0.0.0.0:5001]  INFO QuorumPeer:620 - LOOKING
2010-10-30 07:34:08,547 [QuorumPeer:/0.0.0.0:5001]  INFO FastLeaderElection:649 - New election.
My id =  4, Proposed zxid = 0
2010-10-30 07:34:08,550 [QuorumPeer:/0.0.0.0:5001]  INFO FastLeaderElection:689 - Notification:
3, 0, 1, 4, LOOKING, LOOKING, 3
2010-10-30 07:34:08,551 [QuorumPeer:/0.0.0.0:5001]  INFO FastLeaderElection:689 - Notification:
4, 0, 1, 4, LOOKING, LOOKING, 4
2010-10-30 07:34:08,552 [QuorumPeer:/0.0.0.0:5001]  INFO FastLeaderElection:689 - Notification:
2, 0, 1, 4, LOOKING, LOOKING, 2
2010-10-30 07:34:08,553 [QuorumPeer:/0.0.0.0:5001]  INFO FastLeaderElection:689 - Notification:
3, 0, 1, 4, LOOKING, LOOKING, 2
2010-10-30 07:34:08,553 [QuorumPeer:/0.0.0.0:5001]  INFO FastLeaderElection:689 - Notification:
4, 0, 1, 4, LOOKING, LOOKING, 3
2010-10-30 07:34:08,554 [QuorumPeer:/0.0.0.0:5001]  INFO FastLeaderElection:689 - Notification:
4, 0, 1, 4, LOOKING, LOOKING, 2
2010-10-30 07:34:08,805 [QuorumPeer:/0.0.0.0:5001]  INFO QuorumPeer:654 - LEADING

... kill it, restart it ...

2010-10-30 08:01:29,868 [main]  INFO QuorumPeerConfig:90 - Reading configuration from: /var/
zoo.cfg
2010-10-30 08:01:29,876 [main]  INFO QuorumPeerConfig:287 - Defaulting to majority quorums
...
2010-10-30 08:01:30,101 [QuorumPeer:/0.0.0.0:5001]  INFO QuorumPeer:620 - LOOKING
2010-10-30 08:01:30,120 [QuorumPeer:/0.0.0.0:5001]  INFO QuorumPeer:654 - LEADING (chosen
as leader again)

Leader2:

2010-10-30 07:34:08,531 [QuorumPeer:/0.0.0.0:5001]  INFO QuorumPeer:620 - LOOKING
2010-10-30 07:34:08,550 [QuorumPeer:/0.0.0.0:5001]  INFO QuorumPeer:642 - FOLLOWING
2010-10-30 07:58:58,064 [QuorumPeer:/0.0.0.0:5001]  INFO QuorumPeer:620 - LOOKING
2010-10-30 07:58:58,389 [QuorumPeer:/0.0.0.0:5001]  INFO QuorumPeer:654 - LEADING (becomes
the new leader)

Thanks,
Ruifang







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