ZooKeeper
  1. ZooKeeper
  2. ZOOKEEPER-498

Unending Leader Elections : WAN configuration

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Critical Critical
    • Resolution: Fixed
    • Affects Version/s: 3.2.0
    • Fix Version/s: 3.2.1, 3.3.0
    • Component/s: leaderElection
    • Labels:
      None
    • Environment:
    • Hadoop Flags:
      Reviewed

      Description

      In a WAN configuration, ZooKeeper is endlessly electing, terminating, and re-electing a ZooKeeper leader. The WAN configuration involves two groups, a central DC group of ZK servers that have a voting weight = 1, and a group of servers in remote pods with a voting weight of 0.

      What we expect to see is leaders elected only in the DC, and the pods to contain only followers. What we are seeing is a continuous cycling of leaders. We have seen this consistently with 3.2.0, 3.2.0 + recommended patches (473, 479, 481, 491), and now release 3.2.1.

      1. dc-zook-logs-01.tar.gz
        80 kB
        Todd Greenwood-Geer
      2. pod-zook-logs-01.tar.gz
        109 kB
        Todd Greenwood-Geer
      3. zk498-test.tar.gz
        1.29 MB
        Patrick Hunt
      4. zoo.cfg
        1 kB
        Todd Greenwood-Geer
      5. ZOOKEEPER-498.patch
        30 kB
        Flavio Junqueira
      6. ZOOKEEPER-498.patch
        30 kB
        Flavio Junqueira
      7. ZOOKEEPER-498.patch
        10 kB
        Flavio Junqueira
      8. ZOOKEEPER-498.patch
        4 kB
        Flavio Junqueira
      9. ZOOKEEPER-498-3.2.patch
        30 kB
        Flavio Junqueira

        Activity

          People

          • Assignee:
            Flavio Junqueira
            Reporter:
            Todd Greenwood-Geer
          • Votes:
            0 Vote for this issue
            Watchers:
            0 Start watching this issue

            Dates

            • Created:
              Updated:
              Resolved:

              Development