Jordan Zimmerman created ZOOKEEPER-2476:
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Summary: Not possible to upgrade via reconfig a
Participant+Observer cluster to a Participant+Participant cluster
Key: ZOOKEEPER-2476
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2476
Project: ZooKeeper
Issue Type: Bug
Components: quorum, server
Affects Versions: 3.5.1
Reporter: Jordan Zimmerman
Assignee: Alexander Shraer
Priority: Critical
Contrary to the documentation, it is not possible to upgrade via reconfig a
Participant+Observer cluster to a Participant+Participant cluster.
KeeperException.NewConfigNoQuorum is thrown instead.
PrepRequestProcessor should recognize this special case and let it pass. Test
will be enclosed shortly. I'll work on a fix as well, but I imagine that
[~shralex] will want to look at it.
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