I had to restart the h1guardian0 machine. Commissioners reported that the guardian IOC was still running, but the guardian processes were unresponsive and the log windows would not open. I was able to ssh into the machine, but could not run any command with the error "fork: no memory". Since I could not execute the "reboot" command, I rebooted the machine by pressing the front panel RESET button.
I am setting up sysadmin monitors on this machine to report processor space and memory usage. The machine had only been running for 7 days. Stefan reported that he was running a guardian in dry-run mode recently, other than that regular operation of guardian over the past week.