kaushik srinivas created ZOOKEEPER-3842:
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Summary: 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: 3.5.7
Reporter: kaushik srinivas
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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