With the new traceback, some of the previous mystery errors have some more information:
Job Cleanup exception type #1:
2014-09-25 12:24:21: Argument cannot be null.
2014-09-25 12:24:21: Parameter name: document (System.ArgumentNullException)
2014-09-25 12:24:21: at MongoDB.Driver.MongoCollection.Save (System.Type nominalType, System.Object document, MongoDB.Driver.MongoInsertOptions options) [0x00000] in <filename unknown>:0
2014-09-25 12:24:21: at MongoDB.Driver.MongoCollection.Save (System.Type nominalType, System.Object document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:24:21: at MongoDB.Driver.MongoCollection.Save[Job] (Deadline.Jobs.Job document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:24:21: at MongoDB.Driver.MongoCollection`1[Deadline.Jobs.Job].Save (Deadline.Jobs.Job document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:24:21: at Deadline.StorageDB.MongoDB.MongoJobStorage.DeleteJob (System.String jobID) [0x00000] in <filename unknown>:0 (FranticX.Database.DatabaseConnectionException)
2014-09-25 12:25:36: Job Cleanup Scan - Archived completed job "[EXO] RS_190_1980_v0102_ssh_slowerAvar_cache_flowline_CrestSpray_0 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.
2014-09-25 12:26:43: Job Cleanup Scan - Archived completed job "[EXO] RS_190_2060_v0898_str_Full3_cache_flowline_Wind_0 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.
2014-09-25 12:26:45: Job Cleanup Scan - Warning: completed job "[EXO] RS_190_2060_v0898_str_Full3_cache_flowline_WaveFoam_2 " could not be archived because: An unexpected error occurred while interacting with the database (deadline01.scanlinevfxla.com:27017,deadline.scanlinevfxla.com:27017,deadline03.scanlinevfxla.com:27017):
2014-09-25 12:26:45: Argument cannot be null.
2014-09-25 12:26:45: Parameter name: document (System.ArgumentNullException)
2014-09-25 12:26:45: at MongoDB.Driver.MongoCollection.Save (System.Type nominalType, System.Object document, MongoDB.Driver.MongoInsertOptions options) [0x00000] in <filename unknown>:0
2014-09-25 12:26:45: at MongoDB.Driver.MongoCollection.Save (System.Type nominalType, System.Object document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:26:45: at MongoDB.Driver.MongoCollection.Save[Job] (Deadline.Jobs.Job document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:26:45: at MongoDB.Driver.MongoCollection`1[Deadline.Jobs.Job].Save (Deadline.Jobs.Job document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:26:45: at Deadline.StorageDB.MongoDB.MongoJobStorage.DeleteJob (System.String jobID) [0x00000] in <filename unknown>:0 (FranticX.Database.DatabaseConnectionException)
2014-09-25 12:27:40: Job Cleanup Scan - Archived completed job "[EXO] RS_190_2060_v0898_str_Full3_cache_flowline_WaveFoam_3 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.
2014-09-25 12:28:31: Job Cleanup Scan - Archived completed job "[EXO] RS_190_1980_v0102_ssh_slowerAvar_cache_flowline_CrestMist_2 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.
2014-09-25 12:28:32: Job Cleanup Scan - Warning: completed job "[EXO] RS_190_2060_v0898_str_Full3_cache_flowline_WaveFoam_4 " could not be archived because: An unexpected error occurred while interacting with the database (deadline01.scanlinevfxla.com:27017,deadline.scanlinevfxla.com:27017,deadline03.scanlinevfxla.com:27017):
2014-09-25 12:28:32: Argument cannot be null.
2014-09-25 12:28:32: Parameter name: document (System.ArgumentNullException)
2014-09-25 12:28:32: at MongoDB.Driver.MongoCollection.Save (System.Type nominalType, System.Object document, MongoDB.Driver.MongoInsertOptions options) [0x00000] in <filename unknown>:0
2014-09-25 12:28:32: at MongoDB.Driver.MongoCollection.Save (System.Type nominalType, System.Object document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:28:32: at MongoDB.Driver.MongoCollection.Save[Job] (Deadline.Jobs.Job document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:28:32: at MongoDB.Driver.MongoCollection`1[Deadline.Jobs.Job].Save (Deadline.Jobs.Job document, MongoDB.Driver.WriteConcern writeConcern) [0x00000] in <filename unknown>:0
2014-09-25 12:28:32: at Deadline.StorageDB.MongoDB.MongoJobStorage.DeleteJob (System.String jobID) [0x00000] in <filename unknown>:0 (FranticX.Database.DatabaseConnectionException)
2014-09-25 12:29:07: Job Cleanup Scan - Archived completed job "[EXO] RS_190_1980_v0102_ssh_slowerAvar_cache_flowline_CrestMist_3 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.
2014-09-25 12:29:36: Job Cleanup Scan - Archived completed job "[EXO] RS_190_2060_v0898_str_Full3_cache_flowline_WaveFoam_6 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.
2014-09-25 12:30:07: Job Cleanup Scan - Archived completed job "[EXO] RS_190_2060_v0898_str_Full3_cache_flowline_WaveFoam_8 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.Job cleanup exception type #2:
(deadline01.scanlinevfxla.com:27017,deadline.scanlinevfxla.com:27017,deadline03.scanlinevfxla.com:27017):
2014-09-25 13:13:42: Object reference not set to an instance of an object (System.NullReferenceException)
2014-09-25 13:13:42: at Deadline.StorageDB.MongoDB.MongoJobStorage.DeleteJob (System.String jobID) [0x00000] in <filename unknown>:0 (FranticX.Database.DatabaseConnectionException)
2014-09-25 13:13:43: Job Cleanup Scan - Warning: completed job "[EXO] RS_190_1578_v0038_str_FullWave_cache_flowline_WaveFoamCaps_4 " could not be archived because: An unexpected error occurred while interacting with the database (deadline01.scanlinevfxla.com:27017,deadline.scanlinevfxla.com:27017,deadline03.scanlinevfxla.com:27017):
2014-09-25 13:13:43: Object reference not set to an instance of an object (System.NullReferenceException)
2014-09-25 13:13:43: at Deadline.StorageDB.MongoDB.MongoJobStorage.DeleteJob (System.String jobID) [0x00000] in <filename unknown>:0 (FranticX.Database.DatabaseConnectionException)
2014-09-25 13:14:35: Job Cleanup Scan - Archived completed job "[EXO] RS_190_1578_v0038_str_FullWave_cache_flowline_WaveFoamCaps_5 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.
2014-09-25 13:14:36: Job Cleanup Scan - Warning: completed job "[EXO] RS_190_1578_v0038_str_FullWave_cache_flowline_WaveFoamCaps_6 " could not be archived because: An unexpected error occurred while interacting with the database (deadline01.scanlinevfxla.com:27017,deadline.scanlinevfxla.com:27017,deadline03.scanlinevfxla.com:27017):
2014-09-25 13:14:36: Object reference not set to an instance of an object (System.NullReferenceException)
2014-09-25 13:14:36: at Deadline.StorageDB.MongoDB.MongoJobStorage.DeleteJob (System.String jobID) [0x00000] in <filename unknown>:0 (FranticX.Database.DatabaseConnectionException)
2014-09-25 13:14:37: Job Cleanup Scan - Warning: completed job "[EXO] RS_190_1578_v0038_str_FullWave_cache_flowline_WaveFoamCaps_7 " could not be archived because: An unexpected error occurred while interacting with the database (deadline01.scanlinevfxla.com:27017,deadline.scanlinevfxla.com:27017,deadline03.scanlinevfxla.com:27017):
2014-09-25 13:14:37: Object reference not set to an instance of an object (System.NullReferenceException)
2014-09-25 13:14:37: at Deadline.StorageDB.MongoDB.MongoJobStorage.DeleteJob (System.String jobID) [0x00000] in <filename unknown>:0 (FranticX.Database.DatabaseConnectionException)
2014-09-25 13:15:37: Job Cleanup Scan - Archived completed job "[EXO] RS_190_1578_v0038_str_FullWave_cache_flowline_WaveFoamCaps_8 " because Auto Job Cleanup is enabled and this job has been complete for more than 10 days.