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Posted to issues@zookeeper.apache.org by "Enrico Olivelli (Jira)" <ji...@apache.org> on 2020/02/11 10:50:00 UTC

[jira] [Commented] (ZOOKEEPER-3720) Rolling upgrade failure due to invalid protocol version

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-3720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17034334#comment-17034334 ] 

Enrico Olivelli commented on ZOOKEEPER-3720:
--------------------------------------------

I would like to see 3.6 servers to be able to accept incoming connections from 3.5 peers.


> 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
>            Priority: Major
>             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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