The production DMT computer, h1dmt0, was hung. (I could not do an "ls" on the DMT monitor logs directory, and SenseMonitor_H1 and H1_llhoft frames had stopped showing up. This was perhaps related to the mornings DAQ reboot, as the SenseMonitor_H1 frames stopped showing up shortly after this. The H1_llhoft frames stopped around the time of the morning update of gds on h1dmt3, though supposedly this should not have caused any problems on h1dmt0.)
After a discussion with Dave Barker, a reboot of h1dmt0 seems to have fixed things.