SharePoint 2013 Distributed Cache Issues
Installing, configuring, and troubleshooting the finicky Distributed Cache Recently I worked on several farms where distributed cache encountered many errors and would not start in the system correctly. I want to share what I did to fix and resolve this. Issue 1: Ports Requirement: If you can, make sure the ports needed for the Distributed Cache Service (DCS) are open and working among the servers BEFORE you join a server to a farm or create the farm. Why: Because if these ports are blocked, the DCS which provisions the App Fabric Caching Service on the server, will not provision correctly and only one thing will fix this afterwards. The only thing you can do later is unjoin the failing server(s) from the farm and re-add them to the farm. Scenario: Farm has 4 servers, 1 database, 1 application, 2 web front ends with NLB. The web front ends (WFEs) exist in a separate VLAN or protection domain with a firewall appliance separating the WFEs from the App tier and the datab