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Raul Gutierrez Segales commented on ZOOKEEPER-1732: --------------------------------------------------- What's wrong with the round values? i.e.: the two new servers have IGNOREVALUE (sounds correct right?) and the older followers have the current round value (i.e.: 0x6). I thought the problem would be here: {noformat} * @see https://issues.apache.org/jira/browse/ZOOKEEPER-1732 */ outofelection.put(n.sid, new Vote(n.leader, IGNOREVALUE, IGNOREVALUE, n.peerEpoch, n.state)); if (termPredicate(outofelection, new Vote(n.leader, IGNOREVALUE, IGNOREVALUE, n.peerEpoch, n.state)) && checkLeader(outofelection, n.leader, IGNOREVALUE)) { {noformat} IGNOREVALUE doesn't work here, because we are talking to un-patched cluster members. Sorry if I am completely misleading you :) That's as far as I got with my analysis today. > ZooKeeper server unable to join established ensemble > ---------------------------------------------------- > > Key: ZOOKEEPER-1732 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1732 > Project: ZooKeeper > Issue Type: Bug > Components: leaderElection > Affects Versions: 3.4.5 > Environment: Windows 7, Java 1.7 > Reporter: Germán Blanco > Assignee: Germán Blanco > Priority: Blocker > Fix For: 3.4.6, 3.5.0 > > Attachments: CREATE_INCONSISTENCIES_patch.txt, zklog.tar.gz, > ZOOKEEPER-1732-3.4.patch, ZOOKEEPER-1732-3.4.patch, ZOOKEEPER-1732-3.4.patch, > ZOOKEEPER-1732-3.4.patch, ZOOKEEPER-1732-b3.4.patch, > ZOOKEEPER-1732-b3.4.patch, ZOOKEEPER-1732.patch, ZOOKEEPER-1732.patch, > ZOOKEEPER-1732.patch, ZOOKEEPER-1732.patch, ZOOKEEPER-1732.patch > > > I have a test in which I do a rolling restart of three ZooKeeper servers and > it was failing from time to time. > I ran the tests in a loop until the failure came out and it seems that at > some point one of the servers is unable to join the enssemble formed by the > other two. -- This message was sent by Atlassian JIRA (v6.1#6144)