About: strange phenomenon on domjudge with system which has a hardware load balancer configuration.

Hi all,

Our contestants feedback about the error as follow: “Invalid CSRF token”, moreover contestants were frequently experienced with kicking out phenomenon and very hard to log back into the system.

Our configuration is briefly depicted as follow:

/ domserver 1 \ Client ——> HW load balancer < >== Mysql DB \ domserver 2 /

Please give me some advice to solve the issue.

Trần Bình Dương (Mr) IT Lecturer Software Engineering Department , FPT University 29th Kilometer Thang Long Boulevard, Thach Hoa commune, Thach That Province, Education and Training Area, Hoa Lac High Tech Park, Ha Noi Mobile:(+84) 936168165 Skype: avn_duong.tb E-mail: duongtb@fe.edu.vn Website: ....