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https://issues.apache.org/jira/browse/ZOOKEEPER-3842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mate Szalay-Beko updated ZOOKEEPER-3842:
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Fix Version/s: 3.7.0
> Rolling scale up of zookeeper cluster does not work with reconfigEnabled=false
> ------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-3842
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3842
> Project: ZooKeeper
> Issue Type: Bug
> Components: quorum, server
> Affects Versions: 3.6.1, 3.5.8
> Reporter: kaushik srinivas
> Assignee: Mate Szalay-Beko
> Priority: Blocker
> Labels: features
> Fix For: 3.7.0, 3.6.2, 3.5.9
>
>
> With
> *reconfigEnabled = false (not explicitly setting, relying on the default
> value).*
>
> Install 3 zookeeper servers with 3 zk information in all the 3 zookeeper
> quorum servers.
>
> Do a rolling scale up of cluster from 3 to 5 with below steps.
>
> 1. Install 4th zookeeper with servers list of 1,2,3,4,5
> 2. Install 5th zookeeper with servers list of 1,2,3,4,5
> 3. Do a rolling restart of servers 1 2 & 3 with servers list of 1,2,3,4,5.
>
> Result/Behavior: quorum is lost.
>
> With this https://issues.apache.org/jira/browse/ZOOKEEPER-2819
> description points at a PR [https://github.com/apache/zookeeper/pull/292]
> which should have this issue of rolling restart fixed without dynamic
> reconfiguration feature enabled.
>
> We still see quorum loss issues without dynamic reconfig feature enabled.
>
>
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