Enabling redis on more than one site messes up the sites.
I’ve installed ee 3.3.1 on a fresh Debian 8.1 VPS. Next I’ve created 4 sites on that VPS:
ee site create mysite1.com --wpredis
ee site create mysite2.com --wpredis
ee site create mysite3.com --wpredis
ee site create mysite4.com --wpredis
Next I log in on all the 4 sites and I enable the “redis object cache” on the first site. As soon as I enable the “redis object cache” on the second site, I get logged of that second site and it is not available anymore. When going to ‘mysite2.com’ it redirects to ‘mysite1.com’. The same happens for the third and the fourth site as soon as I enable the “redis object cache”.
Note that I started from a fresh Debian 8.1 VPS.
This is a major issue with the redis cache.
IMO this is a bug, but I was asked to put it here and not on the github repo.