Recently I began to receive emails about the following monit alert:
Code
Mar 27 04:45:01 openmediavault rrdcached[1298]: Received FLUSHALL
Mar 27 04:53:46 openmediavault monit[1261]: 'nginx' failed protocol test [HTTP] at INET[127.0.0.1:80] via TCP -- HTTP: Error receiving data -- Resource temporarily unavailable
Mar 27 04:53:46 openmediavault monit[1261]: 'nginx' trying to restart
Mar 27 04:53:46 openmediavault monit[1261]: 'nginx' stop: /bin/systemctl
Mar 27 04:53:46 openmediavault systemd[1]: Stopping A high performance web server and a reverse proxy server...
Mar 27 04:53:46 openmediavault systemd[1]: Stopped A high performance web server and a reverse proxy server.
Mar 27 04:53:46 openmediavault monit[1261]: 'nginx' start: /bin/systemctl
Mar 27 04:53:46 openmediavault systemd[1]: Starting A high performance web server and a reverse proxy server...
Mar 27 04:53:46 openmediavault systemd[1]: Started A high performance web server and a reverse proxy server.
Mar 27 04:54:17 openmediavault monit[1261]: 'nginx' connection succeeded to INET[127.0.0.1:80] via TCP
Mar 27 05:00:01 openmediavault rrdcached[1298]: Received FLUSHALL
The system load is typically below 20% all day long. I don't think Transmission and a few scripts running wget/curl can overload a J3710 CPU + 8G Memory.
The alert messages were sent once a day, or somewhere close to that frequency. Everything's fine besides those alert messages.
What's going on there?