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https://issues.apache.org/jira/browse/ZOOKEEPER-1805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13811263#comment-13811263
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Flavio Junqueira commented on ZOOKEEPER-1805:
---------------------------------------------
Thanks, guys.
bq. Only a very mild suggestion, if you wish you could remove the changes
introduced by ZOOKEEPER-1732 in Leader.java, Learner.java and QuorumPeer.java.
I don't understand this comment. The change here simply detects that there is a
mix of messages with and without don't care values, which must correspond to a
rolling upgrade, so it ignores the corresponding fields and simply verifies
that the epoch is greater. If this is right, then the changes of ZOOKEEPER-1732
are still required when everyone is sending don't care values. Am I missing
anything?
> "Don't care" value in ZooKeeper election breaks rolling upgrades
> ----------------------------------------------------------------
>
> Key: ZOOKEEPER-1805
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1805
> Project: ZooKeeper
> Issue Type: Bug
> Reporter: Flavio Junqueira
> Assignee: Flavio Junqueira
> Priority: Blocker
> Fix For: 3.4.6, 3.5.0
>
> Attachments: ZOOKEEPER-1805-b3.4.patch, ZOOKEEPER-1805.patch,
> ZOOKEEPER-1805.patch, ZOOKEEPER-1805.patch, ZOOKEEPER-1805.patch,
> ZOOKEEPER-1805.patch, ZOOKEEPER-1805.patch, ZOOKEEPER-1805.patch
>
>
> This is an issue that has been originally reported in ZOOKEEPER-1732.
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