500 Internal Server Error — for the second time

[vvzvlad]

Good afternoon, this is the second time my server has stopped showing me the web panel, responding with "500 Internal Server Error". The ssh and samba access continues to work. Last time this happened three days ago. I am attaching the diagnostic files collected then and just now. 

I can see it in the syslog, but I don't understand what kind of error it indicates. 

 

Mar 26 19:21:15 Farewell nginx: 2022/03/26 19:21:15 [error] 10911#10911: *663875 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.88.90, server: , request: "GET /plugins/ipmi/include/ipmi_temp.php?unit=C&dot=. HTTP/1.1", subrequest: "/auth_request.php", upstream: "fastcgi://unix:/var/run/php5-fpm.sock", host: "192.168.88.111", referrer: "http://192.168.88.111/Apps"

Mar 26 19:21:15 Farewell nginx: 2022/03/26 19:21:15 [error] 10911#10911: *663875 auth request unexpected status: 504 while sending to client, client: 192.168.88.90, server: , request: "GET /plugins/ipmi/include/ipmi_temp.php?unit=C&dot=. HTTP/1.1", host: "192.168.88.111", referrer: "http://192.168.88.111/Apps"

Mar 26 19:22:41 Farewell nginx: 2022/03/26 19:22:41 [error] 10911#10911: *664172 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.88.90, server: , request: "GET /Apps HTTP/1.1", subrequest: "/auth_request.php", upstream: "fastcgi://unix:/var/run/php5-fpm.sock", host: "192.168.88.111", referrer: "http://192.168.88.111/Docker"

 

farewell-diagnostics-20220326-1923.zip farewell-diagnostics-20220323-1541.zip

Edited March 26, 2022 by vvzvlad

[Squid]

First I would try closing all browser tabs on all devices which may be open to the OS

 

Then a reboot

[vvzvlad]

There are no tabs or active devices.

Reboot what? The client device? Doesn't help, the error is the same on all devices. 

Server? It helps. But I can't reboot it every three days, given that rebooting is taking it out of service for an hour or more (stopping all dockers and virtual machines when rebooting is very long for some reason). 

Edited March 26, 2022 by vvzvlad

[vvzvlad]

Three days passed and it happened again. What additional diagnostics can I do to figure out what to do?

farewell-diagnostics-20220329-1210.zip