With 2.2.8-5ubuntu1.1:
$ grep -i cancel /var/log/cups/error_log
I [13/Dec/2018:09:23:02 +0100] [Job 1] Canceling stuck job after 0 seconds.
After upgrading to 2.2.8-5ubuntu1.2:
$ grep -i -e cancel -e complete /var/log/cups/error_log
I [13/Dec/2018:09:25:00 +0100] Full reload complete.
I [13/Dec/2018:09:25:28 +0100] [Job 2] Job completed.
I have finished verification of cosmic.
With 2.2.8-5ubuntu1.1: cups/error_ log 2018:09: 23:02 +0100] [Job 1] Canceling stuck job after 0 seconds.
$ grep -i cancel /var/log/
I [13/Dec/
After upgrading to 2.2.8-5ubuntu1.2: cups/error_ log 2018:09: 25:00 +0100] Full reload complete. 2018:09: 25:28 +0100] [Job 2] Job completed.
$ grep -i -e cancel -e complete /var/log/
I [13/Dec/
I [13/Dec/