Last processed zxid set prematurely while establishing leadership
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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
Fix For: 3.3.2
Attachments: ZOOKEEPER-790.patch
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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