ZooKeeper
  1. ZooKeeper
  2. ZOOKEEPER-484

Clients get SESSION MOVED exception when switching from follower to a leader.

    Details

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

      Description

      When a client is connected to follower and get disconnected and connects to a leader it gets SESSION MOVED excpetion. This is beacuse of a bug in the new feature of ZOOKEEPER-417 that we added in 3.2. All the releases before 3.2 DO NOT have this problem. The fix is to make sure the ownership of a connection gets changed when a session moves from follower to the leader. The workaround to it in 3.2.0 would be to swithc off connection from clients to the leader. take a look at leaderServers java property in http://hadoop.apache.org/zookeeper/docs/r3.2.0/zookeeperAdmin.html.

      1. ZOOKEEPER-484-3.2.patch
        9 kB
        Mahadev konar
      2. ZOOKEEPER-484.patch
        10 kB
        Mahadev konar
      3. sessionTest.patch
        2 kB
        Benjamin Reed

        Activity

          People

          • Assignee:
            Mahadev konar
            Reporter:
            Mahadev konar
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            Dates

            • Created:
              Updated:
              Resolved:

              Development