Hudson commented on ZOOKEEPER-790:

Integrated in ZooKeeper-trunk #884 (See 
    ZOOKEEPER-790. Last processed zxid set prematurely while establishing 
leadership (fpj via breed)

> Last processed zxid set prematurely while establishing leadership
> -----------------------------------------------------------------
>                 Key: ZOOKEEPER-790
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-790
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: quorum
>    Affects Versions: 3.3.1
>            Reporter: Flavio Paiva Junqueira
>            Assignee: Flavio Paiva Junqueira
>            Priority: Blocker
>             Fix For: 3.3.2, 3.4.0
>         Attachments: ZOOKEEPER-790-3.3.patch, ZOOKEEPER-790-3.3.patch, 
> ZOOKEEPER-790.patch, ZOOKEEPER-790.patch, ZOOKEEPER-790.patch, 
> ZOOKEEPER-790.patch, ZOOKEEPER-790.patch, ZOOKEEPER-790.travis.log.bz2
> The leader code is setting the last processed zxid to the first of the new 
> epoch even before connecting to a quorum of followers. Because the leader 
> code sets this value before connecting to a quorum of followers 
> (Leader.java:281) and the follower code throws an IOException 
> (Follower.java:73) if the leader epoch is smaller, we have that when the 
> false leader drops leadership and becomes a follower, it finds a smaller 
> epoch and kills itself.

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