I am trying to switch the PHP execution mode to from “FCGId (run as virtual server owner)” to “FPM (run as virtual server owner)”. When I do, the website does not load (throwing a 503 error). This is what I find in the virtual host log file:
[proxy:error] [pid 8783] AH00940: FCGI: disabled connection for (localhost) [proxy:error] [pid 8776] (13)Permission denied: AH02454: FCGI: attempt to connect to Unix domain socket /var/php-fpm/14492690422562.sock (localhost) failed [proxy:error] [pid 8776] AH00959: ap_proxy_connect_backend disabling worker for (localhost) for 60s [proxy_fcgi:error] [pid 8776] [client*************:*****] AH01079: failed to make connection to backend: httpd-UDS
I am running CentOS Linux 7.3.1611 and PHP 7.1.2. I also have Varnish 4.0.4 running upfront of Apache 2.4.6 with SELinux disabled. Webmin 1.831 and Virtualmin 5.06.
Any idea on what the issue may be? Or where to look?