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Charity Majors commented on ZOOKEEPER-335: ------------------------------------------ I ran into this bug this morning, but it also seemed to put my cluster into an unusable state. The cluster stopped accepting all connections, until I restarted node one. After node one departed the cluster, nodes two and three formed a quorum and started serving again. Node one was unable to rejoin, and had this error: 2010-06-02 17:04:56,486 - FATAL [QuorumPeer:/0:0:0:0:0:0:0:0:2181:follo...@71] - Leader epoch a is less than our epoch b 2010-06-02 17:04:56,486 - WARN [QuorumPeer:/0:0:0:0:0:0:0:0:2181:follo...@82] - Exception when following the leader java.io.IOException: Error: Epoch of leader is lower until I cleared the data directory and restarted again. > zookeeper servers should commit the new leader txn to their logs. > ----------------------------------------------------------------- > > Key: ZOOKEEPER-335 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-335 > Project: Zookeeper > Issue Type: Bug > Components: server > Affects Versions: 3.1.0 > Reporter: Mahadev konar > Assignee: Mahadev konar > Priority: Blocker > Fix For: 3.4.0 > > > currently the zookeeper followers do not commit the new leader election. This > will cause problems in a failure scenarios with a follower acking to the same > leader txn id twice, which might be two different intermittent leaders and > allowing them to propose two different txn's of the same zxid. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.