This morning I did the automatic update of vnqm to 4.2.4, and received the error "Plugin "VNQM Business Layer" failed to start on Please restart the Module Engine service on "". Also ipsla monitor fails to start. There is already an knowledge article "VNQM Business Layer failed to start" on https://support.solarwinds.com/Success_Center/VoIP_Network_Quality_Manager_(VNQM)/VNQM_Business_Layer_failed_to_start.
But the logs in the IPSLAbusinesslayer.txt is not the same. Only the beginneing is the same.
2016-07-29 16:34:36,975 [7] ERROR BusinessLayer.Plugin (null) - IP SLA Monitor service [EUNT00110] failed to start.
System.ArgumentException: An item with the same key has already been added.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at SolarWinds.Orion.IpSla.BusinessLayer.ServiceMonitor.UpdateEngines()
at SolarWinds.Orion.IpSla.BusinessLayer.ServiceMonitor.Start()
at SolarWinds.Orion.IpSla.BusinessLayer.VoipBusinessLayerPlugin.Start()
2016-07-29 16:49:35,093 [Scheduler] WARN OperationManager CheckOperations - Removing job d6d05e62-ff6b-4c02-afe1-7b4cd090b6e8 because of a time out
2016-07-29 16:49:35,093 [Scheduler] WARN OperationManager CheckOperations - Resetting job assignment of operation "UdpVoipJitter - 19 -> 3" (ID: 20)
2016-07-29 16:49:35,124 [Scheduler] INFO SolarWinds.Orion.Core.Dependencies.InformationService.SwisHelper CheckOperations GetStatusUpdatedByDependencies - SWIS connection pool created with size 1
*** Assembly SolarWinds.InformationService.Contract2, Version=2016.1.100.752, Culture=neutral, PublicKeyToken=null, .NET version v4.0.30319 ***
2016-07-29 16:49:36,046 [Scheduler] WARN OperationManager CheckOperations - Removing job 45ccda39-d502-4516-98f0-11a2c5c4765e because of a time out
2016-07-29 16:49:36,046 [Scheduler] WARN OperationManager CheckOperations - Resetting job assignment of operation "UdpVoipJitter - 17 -> 3" (ID: 25)
2016-07-29 16:49:36,046 [Scheduler] WARN OperationManager CheckOperations - Removing job 79011793-e175-417e-b282-6d69c7b77e3b because of a time out
2016-07-29 16:49:36,046 [Scheduler] WARN OperationManager CheckOperations - Resetting job assignment of operation "UdpVoipJitter - 19 -> 17" (ID: 21)
2016-07-29 16:49:36,062 [Scheduler] INFO BusinessLayer.Service CheckOperations - Operation Manager -> Responder inactive, register for polling... [NodeID=17]
2016-07-29 16:49:36,062 [Scheduler] ERROR OperationManager CheckOperations - Error occurred during periodic operation check
System.ObjectDisposedException: Cannot access a disposed object.