I'm getting 400 Bad request errors on my Drupal application.
It's hosted on 2 ec2 instances behind an ELB load balancer. Using nginx v1.12.1 and php v7.2
I can't find a way to reproduce it and it does not happen to everybody, the site is working fine on my laptop when somebody else is getting the error on their mobile phone.
Webmon is also getting the error, it lasted 50 minutes last night and resolved itself.
Anybody has any clue where is this coming from?
Edit 12/04/2018
Added the following to help with debugging:
in www.conf catch_workers_output = yes
in nginx.conf error_log /var/log/nginx/error.log info;
We are unable to reproduce this error on our end at this time which increases our frustration in debugging.
