I have a load balanced system with multiple servers. When using “remember me” (Cookie based login), I can see via logs that Yii can only see the cookie if it’s hitting the same server in the backend. As a result, our users’ remember me will work only if they are lucky to hit the right server.
The sessions are in fact stored in a central db. It looks like the other servers simply can’t read the cookies correctly. I have no issues with shared sessions.