TROUBLESHOOTING.md

Troubleshooting

502 Bad gateway

If you have setup your Symfony project before v2.4.0-BETA1 you have following handlers in your config_dev.yml

monolog:
        chromephp:
            type:  chromephp
            level: info

This configuration is generating very HUGE headers wich break Nginx default limit.

[error] 28#0: *2 upstream sent too big header while reading response header from upstream

A solution could be to remove chromephp handler. If you want to use this handler, you have to increase Nginx buffer limits with custom directives.

fastcgi_buffers 16 512k;
fastcgi_buffer_size 512k;

Look at the README how to load custom directives.

Check Symfony related PR for more details.