Went to get last night's backup off a (not commonly visited) remote server for some DEV work ... most recent backup was 20-Sep-2017. Yeah, I did the whole "WTF" routine ...
Went into SQL Agent and looked at the History ... Bizarre! ... its still running ... It complete the backup correctly (on 20-Sep) but then the next step has stalled - looks like its an "In Use File" that it is (still!!) waiting on.
Blinking accident-waiting-to-happen and NOT (for us at least) something that we have ever anticipated might happen. We check for "Terminated with error" but not "Job did not start" - of course the "Next start date" for the job is probably useless (I haven't checked yet) as I am assuming it won't, yet, have been set - because the job will be set to not start if it is already running.
Something else to watch out for - or maybe this is not a problem that you could have/ If so "why is that" please?