Mate Szalay-Beko created ZOOKEEPER-3720:
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Summary: Rolling upgrade failure due to invalid protocol version
Key: ZOOKEEPER-3720
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3720
Project: ZooKeeper
Issue Type: Improvement
Affects Versions: 3.6.0, 3.7.0
Reporter: Mate Szalay-Beko
Assignee: Mate Szalay-Beko
Fix For: 3.6.0, 3.7.0, 3.6.1
During the rolling upgrade of a 3.5.6 cluster to 3.6.0, the peers are not able
to talk to each other due to different protocol version in the QuorumCnxManager
introduced by ZOOKEEPER-3188.
We need to fix the rolling upgrade between 3.5.6 and 3.6.0 in a way that the
quorum is always up an healthy.
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