It appears that some process variables are taking on values with characters that do not conform to JSON:

Oct 18 11:10:12 conlog-master conlogd[7334]: terminate called after throwing an instance of 'sql::SQLException'
Oct 18 11:10:12 conlog-master conlogd[7334]: what():  Invalid JSON text: "Invalid escape character in string." at position 44 in value for column 'events.data'.
Oct 18 11:41:52 conlog-master conlogd: Server started. prefix: 'H1:CDS-CONLOG_' database: 'conlog' max inserts: 500 max time: 30 keep alive period: 30 time source: 0 create_messages: 1
Oct 18 11:59:32 conlog-master conlogd[8524]: terminate called after throwing an instance of 'sql::SQLException'
Oct 18 11:59:32 conlog-master conlogd[8524]: what():  Invalid JSON text: "Invalid escape character in string." at position 44 in value for column 'events.data'.
Oct 18 12:19:34 conlog-master conlogd: Server started. prefix: 'H1:CDS-CONLOG_' database: 'conlog' max inserts: 500 max time: 30 keep alive period: 30 time source: 0 create_messages: 1
Oct 18 12:34:12 conlog-master conlogd[9092]: terminate called after throwing an instance of 'sql::SQLException'
Oct 18 12:34:12 conlog-master conlogd[9092]: what():  Invalid JSON text: "Invalid escape character in string." at position 44 in value for column 'events.data'.

The same error repeats at each loading of the channel list.