问题
I have three Symfony2 applications running on different servers, I can not keep me logged in on more than one application at the same time.
When I do I log into one of the applications automatically when I try to access another application in which I was already logged in I am required to login again.
I believe they are sharing a session ID or something.
Could someone enlighten me what happens and how to solve this problem?
Thank you
来源：https://stackoverflow.com/questions/24891328/session-in-different-applications-symfony2