We get the following error for some of our jobs:
2015-05-07 14:44:11: Traceback (most recent call last):
2015-05-07 14:44:11: File “DeadlineUI\UI\Commands\JobCommands.py”, line 1381, in InnerExecute
2015-05-07 14:44:11: DocumentException: Failed to Delete one or more Jobs, see application log for details.
2015-05-07 14:44:11: at Deadline.StorageDB.MongoDB.MongoJobStorage.DeleteJobs(String[] jobIDs)
2015-05-07 14:44:11: at Deadline.Controllers.DataController.DeleteJobs(Job[] jobs)
This shows up in the console.
We tried as superuser, regular user, any user, from multiple machines 
Deadline Version: 7.1.0.32 R (cb265b604)
Strange that it only happens for some jobs. Are you able to archive the job? Note that when archiving, you would need to disable the option to delete the job from the DB, since it would just result in the same error. If you can archive it, can you send it to us so we can import it and try to reproduce?
Something else to check is if the jobs that are failing like this are already in the Undelete Job list in the Monitor. If so, that could be the problem, and we’d have to figure out how to avoid this in the future.
Thanks!
Ryan
Well, sadly, we can’t reproduce the issue anymore 
The same jobs we had the issue with last week can be deleted just fine now… We are noticing some weird db issues like this, please see other thread as well:
viewtopic.php?f=205&t=13373