[jira] Updated: (ZOOKEEPER-484) Clients get SESSION MOVED exception when switching from follower to a leader.

["Patrick Hunt (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-484?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Patrick Hunt updated ZOOKEEPER-484:
-----------------------------------

      Component/s: server
    Fix Version/s: 3.3.0

> Clients get SESSION MOVED exception when switching from follower to a leader.
> -----------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-484
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-484
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.2.0
>            Reporter: Mahadev konar
>            Assignee: Mahadev konar
>            Priority: Blocker
>             Fix For: 3.2.1, 3.3.0
>
>
> 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.

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