On 5/26/2017 9:48 AM, Jordan Zimmerman wrote: > In ZK 3.4.x if you have configuration differences amongst your instances you > are susceptible to a split brain. See this email thread, "Rolling Config > Change Considered Harmful": > > http://zookeeper-user.578899.n2.nabble.com/Rolling-config-change-considered-harmful-td7578761.html > > <http://zookeeper-user.578899.n2.nabble.com/Rolling-config-change-considered-harmful-td7578761.html> > > In ZK 3.5.x I'm not even sure it would work.
Thank you for your reply. I don't fully understand everything being discussed in that thread, but it sounds like bad things could happen once connectivity is restored. If DC1 and DC2 were both operational from a client perspective, but unable to communicate with each other, I think the potential for bad things would be even higher, because there could be confusion about which Solr servers are leaders, as well as which ZK server is the leader. Thanks, Shawn
