Well, my string of flawless upgrades finally was finally brought to a fiery end with 2402 CU1! We upgraded the first controller and it failed after database upgrade. Studio won't start anymore with an error stating all services have not been configured. Looks like this would be Citrix Machine Creation Services which is not running. The eventlog tells me: Service start-up failed with : System.NullReferenceException: Object reference not set to an instance of an object. at Citrix.MachineCreation.Logic.MachineCreationLogic.ResetEnabledFeatures() at Citrix.MachineCreation.Logic.MachineCreationLogic.IsEnabled(SiteFeature feature) at RemoteHCLClient.FeatureService.IsFeatureEnabled(String featureName) at Citrix.MachineCreation.Logic.MachineCreationLogic.InitializeRemoteHcl() at Citrix.MachineCreation.Logic.MachineCreationLogic.Initialize() at Citrix.Fma.Sdk.ServiceCore.ServiceRunner`1.InitializeService() at Citrix.Fma.Sdk.ServiceCore.ServiceRunner`1.RunStartupSequence() at Citrix.Fma.Sdk.ServiceCore.ServiceRunner`1.DoWork() at Citrix.Fma.Sdk.ServiceCore.ServiceRunner`1.DoWorkShell() and Google give me exactly one result: https://robinvanbruggen.nl/2021/10/citrix-studio-database-has-not-been-configured-for-the-citrix-machine-creation-service-service/ Unfortunately this does not help, neither does resetting all performance counters. Is there anybody else that has seen this problem or has pointers? So far the CVAD environment is still up, just running on only one controller and only accessible via Director

My 2203 LTSR to 2402 CU1 LTSR failed in similar fashion, basically nothing on the internet to find a solution. I've yet to find a solution. Reverted to a backup for now, haven't had time to dig into it again.

Troubleshooting: According to the register I should have these performance counters: Database Transactions/sec Database Transaction Errors/sec Database Avg. Transaction Time Database Avg. Transaction Time Base Database Connected Looking in Perfmon, I'm missing "Database Avg. Transaction Time Base"