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https://issues.apache.org/jira/browse/ZOOKEEPER-1805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flavio Junqueira updated ZOOKEEPER-1805:
----------------------------------------

    Attachment: ZOOKEEPER-1805.patch

Here is a new patch after some thinking and feedback from German. It ignores 
the epoch in the comparison when the votes come from servers that are not 
looking, but I have done now in a way that we don't need to define a don't care 
value any longer. I'm not entirely happy with the test case, though.

> "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, 
> 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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