On 3/15/2017 6:45 PM, Walter Underwood wrote: > I have a pretty good guess what happened. I requested a Zookeeper > 3.4.6 cluster, but they built a 3.4.9 cluster.
This is the first I've heard of problems with ZK 3.4.9 on the server side. That would be the server version that I would recommend for a new install -- the list of bugfixes on each 3.4.x ZK version is quite long. Without checking each one I cannot say whether any of them would affect SolrCloud, but I'd rather be running a version with the fixes. The log messages read like it's not able to establish a TCP connection, which is a fairly low level problem. The problems I consider to be most likely are a firewall or a security layer like selinux/apparmor. I would not expect a ZK downgrade to make any difference, unless another change is made along with the downgrade. Thanks, Shawn
