Github user justinleet commented on the issue:
https://github.com/apache/metron/pull/1143
If the job has been submitted, but not yet returned with a job id (because
it takes a few seconds to kick of a job), the kill request fails.
The request goes to (for example)
http://node1:4201/api/v1/pcap/kill/undefined
The job continues in the background with no progress bar or ability to
cancel.
Otherwise, this seems to function pretty well.
Once the conflicts are cleaned up, I'll take another look.---
