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

Nicky Gerritsen nickygerritsen at me.com
Sat Oct 31 11:52:08 CET 2020


You need to share sessions between the web servers. See https://github.com/DOMjudge/domjudge/wiki/Scaling-and-load-testing

Nicky
On 31 Oct 2020, 11:50 +0100, Tran Binh Duong (FE FPTU HN) <DuongTB at fe.edu.vn>, wrote:
> 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 at fe.edu.vn
> Website: ....
>
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