Hey guys, please excuse my short explanation but I don't have much free time. I'm running on the beta branch and today I didn't update for like 1 month, today I updated because of the security patch in nginx 1.11.1. When the nginx instance restarted I was getting two errors at my WordPress Redis include file "/usr/local/nginx/conf/wpincludes/example.com/rediscache_example.com.conf" so it wasn't able to launch. The errors were both for the redis_pass argument: "no port in upstream 'redisbackend'". So yeah... I immediately thought that "redisbackend" was not declared or something and just replaced both lines with "localhost:6379". And it worked, dirty easy fix since I had no time to look into further. I'm running WordPress with redis cache at nginx level, I followed eva's tutorial. Thanks!