Re: new leader accepting create requests too early?

[Flavio Junqueira]

You're right in that node #3 declared itself leader given the sequence of notifications it received: it received one notification from node #1 saying that it was looking in the first few lines of your log excerpt and at least one from itself. However, node #3 does not have enough support (followers), so it won't exercise leadership. From the notifications, it sounds like node #1 is the one exercising leadership. -Flavio   On Mar 22, 2011, at 8:11 AM, Jeremy Stribling wrote: Thanks for the response.  I thought that the "my state" in this line, printed in node #3's log: 2672 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 215 (n.leader), 12884902548 (n.zxid), 3 (n.round), FOLLOWING (n.state), 126 (n.sid), LEADING (my state) indicated that node #3 was the leader, but I'm probably misinterpreting it (I haven't had a chance to look through the source yet to figure it out for sure).  In any case, what I think are the relevant notifications of node #1's logs look like this: 307122 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 37 (n.leader), 17179869831 (n.zxid), 1 (n.round), LOOKING (n.state), 37 (n.sid), LEADING (my state) 307142 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 37 (n.leader), 17179869831 (n.zxid), 3 (n.round), LOOKING (n.state), 37 (n.sid), LEADING (my state) 310850 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 215 (n.leader), 17179869918 (n.zxid), 4 (n.round), LOOKING (n.state), 215 (n.sid), LOOKING (my state) 310850 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 37 (n.leader), 17179869831 (n.zxid), 3 (n.round), LEADING (n.state), 37 (n.sid), LOOKING (my state) 311051 [QuorumPeer:/0.0.0.0:2888] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification time out: 400 311053 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 37 (n.leader), 17179869831 (n.zxid), 3 (n.round), LEADING (n.state), 37 (n.sid), LOOKING (my state) 311054 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 215 (n.leader), 17179869918 (n.zxid), 4 (n.round), LOOKING (n.state), 215 (n.sid), LOOKING (my state) 311454 [QuorumPeer:/0.0.0.0:2888] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification time out: 800 311456 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 37 (n.leader), 17179869831 (n.zxid), 3 (n.round), LEADING (n.state), 37 (n.sid), LOOKING (my state) 311457 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 215 (n.leader), 17179869918 (n.zxid), 4 (n.round), LOOKING (n.state), 215 (n.sid), LOOKING (my state) 312257 [QuorumPeer:/0.0.0.0:2888] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification time out: 1600 312260 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 215 (n.leader), 17179869918 (n.zxid), 4 (n.round), LOOKING (n.state), 215 (n.sid), LOOKING (my state) 312263 [WorkerReceiver Thread] INFO org.apache.zookeeper.server.quorum.FastLeaderElection  - Notification: 37 (n.leader), 17179869831 (n.zxid), 3 (n.round), LEADING (n.state), 37 (n.sid), LOOKING (my state) which, according to my earlier logic, seems to indicate that node #1 never even thought it was following node #3. Anyway, I will put the logs together and make a JIRA tomorrow if I get some time, and will follow up here with a link.  Thanks again, Jeremy flavio junqueira   research scientist   f...@yahoo-inc.com direct +34 93-183-8828   avinguda diagonal 177, 8th floor, barcelona, 08018, es phone (408) 349 3300    fax (408) 349 3301