Website hosted at Plesk is unavailable: 504 Gateway Time-out

Symptoms

• A website is not accessible. The following error is shown in a browser:

  504 Gateway Time-out

• The following error message can be found in the domain error log file /var/www/vhosts/example.com/logs/error_log:

  [proxy_fcgi:error] [pid 42290:tid 140458047010560] (70007)The timeout specified has expired: [client 203.0.113.2:54693] AH01075: Error dispatching request to :, referer: http://example.com/gallery

• The following error message can also be found in the domain proxy error log file /var/www/vhosts/example.com/logs/proxy_error_log:

  [error] 2766#0: *19950 upstream timed out (110: Connection timed out) while connecting to upstream, client: 203.0.113.3, server: example.com, request: "GET / HTTP/2.0", upstream: "https://203.0.113.2:7081/", host: "example.com"

Cause

Website misconfiguration.

Resolution

1. Connect to the server using SSH.
2. Run the following command to rebuild domain configuration files:

   # plesk repair web example.com