Daqd restarts with log showing a repeating timestamp on incoming data

This is in response to a FRS:

https://services1.ligo-la.caltech.edu/FRS/show_bug.cgi?id=20719

Logs show:

2021-10-12T14:36:32-07:00 h1daqdc0.cds.ligo-wa.caltech.edu daqd[38417]: Dropped data from shmem or received 0 dcus; gps now = 1318109810, 5; was = 1318109810, 5; dcu count = 109