- Plesk for Linux
- In Tools & Settings > Apache Web Server, Apache restart interval value is set to 0.
- After settings update via Plesk sites show periodically show
502 Bad Gatewayerror.
The records below can be found in
2020-04-29 13:35:29 Error 203.0.113.2 28571#0: *6219628 connect() failed (111: Connection refused) while connecting to upstream nginx error
2020-04-29 13:38:24 Error 203.0.113.2 31784#0: *6220942 peer closed connection in SSL handshake (104: Connection reset by peer) while SSL handshaking to upstream nginx error
Also the following notification can be received by Watchdog:
The Web Server (Apache) service on host example.com is down. The problem was discovered on Jan 14, 2021 08:57 AM.
When the interval is set to 0, Apache web server restarts immediately to apply new domain settings. Apache restart causes websites unavailability.
Open Tools & Settings > Apache Web Server.