PHP 5.6.22 (fpm-fcgi) (built: Jun 7 2016 20:03:18) nginx version: nginx/1.11.1 I see quite a few of these every day. I found it while searching for problems related to some users randomly getting err_connection_time_out in Chrome. The server is hosted at linode 6 core / 8GB ram. How do I enable debugging so that I can trace the errors? Also can any of you explain what code 1 means?