LiteSpeed 503 errors

Symptoms

A site running on a LiteSpeed server gives a 503 error, and the LiteSpeed error log shows an error similar to the following.

2025-03-11 15:52:49.756443 [INFO] [24160] [T0] [127.0.0.1:58268#APVH_domain.tld:443] connection to [uds://usr/local/lsws/extapp-sock/APVH_username_Suea-php74.sock] on request #0, confirmed, 0, associated process: 0, running: 0, error: Connection refused!

Description

There are many causes for 503 errors. The stderr.log file often records the specific cause.

Workaround

1. Access the server's command line as the 'root' user via SSH or "Terminal" in WHM.
2. Search the stderr.log file for the domain owner's UID.

   grep $uid /usr/local/apache/logs/stderr.log

   Please note that "$uid" must be replaced with the cPanel user's UID.

Additional resources

LiteSpeed Documentation: 503 Error