The /var/log/messages file reports:
Feb 17 08:20:44 sensor1 /usr/sbin/adm-connector[8405]: Couldn't fetch results URL localhost:8080/engine/v1/alerts_longpoll/20170123182409-00002?probability=80&timeout=60 (http ret=404) response:{ "message" : "No known job with id '20170123182409-00002'", "errorCode" : 20101}
OR
Feb 2 10:40:32 sensor1 /usr/sbin/adm-connector[8424]: Couldn't fetch results URL localhost:8080/engine/v1/alerts_longpoll/20170123182409-00002?probability=80&timeout=60 (http ret=400) response:{ "message" : "Cannot alert on job '20170123182409-00002' because the job is not running", "errorCode" : 60103} .
This was seen after repeated reboots. The process may be losing track of old jobs, which have been removed but remain in the queue.
The jobs need to be removed and the service restarted.
For the message above, delete the job using these commands:
service adm-connector restart
curl -X DELETE 'http://localhost:8080/engine/v1/jobs/20170123182409-00002' (use the job number from your own log file)
service adm-connector restart