Diagnosing Problems related to WebSockets

• Check status of websocket daemon:

  sudo systemctl status submitty_websocket_server
  

• If necessary, try to restart the websocket daemon:

  sudo systemctl restart submitty_websocket_server
  

• Look at the more detailed, recent stdout & stderr from the websocket daemon:

  sudo journalctl -u submitty_websocket_server
  

• Look for errors about sockets in:

  /var/log/syslog
  

• Look in the site_errors log:

  tail -n 50 site_errors/<TODAYS_DATE>.log
  

• Look for errors in the the apache log:

  /var/log/apache2/submitty.log