daqd process died, final messages include 
"start net-writer 1034523398 17204 { long list of channels", 
"->4 kill net-writer 0", 
"connection on fd 15 closed", 
"read(seq_num) from NDS failed; errno=0", 
"connection closed on fd=16", and 
"Ask for retransmission of 20 packets; port 7097" which was repeated many times, then 
"Have to skip 22 packets (retry limit exceeded)" as the last entry.

Restarted daqd process.