Submitty has a daemon to run various helper jobs. The system is configured by default to run at most five jobs in parallel. When an instructor creates or edits a gradeable, the build script for the autograding configuration is automatically placed into this job queue. Similarly, when a new plagiarism detection task is created or an existing one is edited, a job is placed in the queue.

• The details for each job are written to a .json file in the /var/local/submitty/daemon_job_queue/ directory.

• Check the status of the daemon:

  sudo systemctl status submitty_daemon_jobs_handler
  

• If necessary, try to restart the jobs daemon:

  sudo systemctl restart submitty_daemon_jobs_handler
  

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

  sudo journalctl -u submitty_daemon_jobs_handler
  

• When debugging, it can be helpful to manually run the daemon and inspect the output:

  First, stop the daemon:

  sudo systemctl stop submitty_daemon_jobs_handler
  

  Then run the daemon directly:

  sudo su -c '/usr/local/submitty/sbin/submitty_daemon_jobs/submitty_daemon_jobs.py' submitty_daemon
  

  When you are done, start the daemon again:

  sudo systemctl start submitty_daemon_jobs_handler
  

NOTE: When you re-run sudo /usr/local/submitty/.setup/INSTALL_SUBMITTY.sh, it will stop and restart the jobs daemon if it is running.