PHP-FPM not working, 503 Service Unavailable

[gailclark80]

My website suddenly got the following error
503 Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

I checked the error log of the domain name and found the following code

it seem the PHP-FPM stopped working, how to fix it?

[Thu Apr 28 03:34:04.581381 2022] [proxy:error] [pid 969:tid 140569548404480] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /opt/alt/php-fpm74/usr/var/sockets/mydomain.sock (*) failed
[Thu Apr 28 03:34:04.581404 2022] [proxy_fcgi:error] [pid 969:tid 140569548404480] [client 113.118.232.250:46144] AH01079: failed to make connection to backend: httpd-UDS
[Thu Apr 28 03:34:04.609360 2022] [proxy:error] [pid 968:tid 140569531619072] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /opt/alt/php-fpm74/usr/var/sockets/mydomain.sock (*) failed
[Thu Apr 28 03:34:04.609400 2022] [proxy_fcgi:error] [pid 968:tid 140569531619072] [client 92.247.181.45:46146] AH01079: failed to make connection to backend: httpd-UDS
[Thu Apr 28 03:34:05.585224 2022] [proxy:error] [pid 967:tid 140569422513920] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /opt/alt/php-fpm74/usr/var/sockets/mydomain.sock (*) failed
[Thu Apr 28 03:34:05.585250 2022] [proxy_fcgi:error] [pid 967:tid 140569422513920] [client 113.118.232.250:46148] AH01079: failed to make connection to backend: httpd-UDS
[Thu Apr 28 03:34:19.692806 2022] [proxy:error] [pid 968:tid 140569514833664] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /opt/alt/php-fpm74/usr/var/sockets/mydomain.sock (*) failed
[Thu Apr 28 03:34:19.692837 2022] [proxy_fcgi:error] [pid 968:tid 140569514833664] [client 82.146.56.36:46154] AH01079: failed to make connection to backend: httpd-UDS
[Thu Apr 28 03:34:31.446718 2022] [proxy:error] [pid 968:tid 140569659246336] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /opt/alt/php-fpm74/usr/var/sockets/mydomain.sock (*) failed
[Thu Apr 28 03:34:31.446743 2022] [proxy_fcgi:error] [pid 968:tid 140569659246336] [client 66.249.64.182:46156] AH01079: failed to make connection to backend: httpd-UDS
[Thu Apr 28 03:34:35.353507 2022] [proxy:error] [pid 968:tid 140569573582592] (2)No such file or directory: AH02454: FCGI: attempt to connect to Unix domain socket /opt/alt/php-fpm74/usr/var/sockets/mydomain.sock (*) failed

[narin]

There is no SOCKET connection in PHP-FPM 7.4 configuration of your MYDOMAIN.COM domain name. For PHP-FPM 7.4 you need to configure php 7.4 to add a plugin for mydoma.com.

[rcschaff]

systemctl status php-fpm74

if it is stopped, start it

systemctl start php-fpm74


if it's alive, try restarting it

systemctl restart php-fpm74

if that doesn't work, please post the contents of

journalctl -xeu php-fpm74