ActionCable doesn't work with Unicorn in Rails production server (nginx)

Question

I have a RoR project.

However, when I use Nginx and Unicorn to run my actioncable in production server it doesn't work like it does in my development Rails environment.

The error I got is as shown in below:

Rack::Lint::LintError: Status must be >=100 seen as integer

I can't understand the cause of error.

Answer 1

Try adding ENV['RACK_ENV'] = "deployment" to your unicorn config file. See this issue for more details: https://github.com/rails/rails/issues/26179

Answer 2

I've been through the same error and the below solution worked for me. You can upgrade your nginx.confi file with below configurations:

 location /cable/ {
       proxy_pass http://$app_server;
       proxy_http_version 1.1;
       proxy_set_header Upgrade $http_upgrade;
       proxy_set_header Connection "Upgrade";
    }

I hope this solution helps :)