it.blo.gg

After installing the VMM Console and Agent on our DPM server to enable back up of Hyper-V Live Migration Cluster, the DPM-VMM Helper Service (VmmHelperServiceHost.exe) does not start on Windows Server 2012.

 

This can be found in Event Viewer:

 

Log Name: Application

Source: DpmVmmHelperService

Event ID: 0

 

 Service cannot be started. System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Security.SecurityException: Requested registry access is not allowed.
   at Microsoft.Win32.RegistryKey.OpenSubKey(String name, Boolean writable)
   at Microsoft.Internal.EnterpriseStorage.Dls.VmmHelper.RunSpacePool.GetNumberOfSteadyStateRunspaces()
   at Microsoft.Internal.EnterpriseStorage.Dls.VmmHelper.CVmmHelperService..ctor()
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.ServiceModel.Description.ServiceDescription.CreateImplementation(Type serviceType)
   at System.ServiceModel.Description.ServiceDescription.SetupSingleton(ServiceDescription serviceDescription, Object implementation, Boolean isWellKnown)
   at System.S...

 

When trying to start the service in services.msc, it states:

 

The DPM-VMM Helper Service service on Local Computer started and then stopped. Some services stop automatically if they are not in use by other services or programs.

 

I fired up Process Monitor (http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx) and filtered out the process VmmHelperServiceHost.exe highlighting the result ACCESS DENIED and found this:

 

VmmHelperServiceHost.exe 7392 RegOpenKey HKLM\Software\Microsoft\Microsoft Data Protection Manager\2.0\Configuration ACCESS DENIED Desired Access: Read

 

I opened up regedit and browsed to HKLM\Software\Microsoft\Microsoft Data Protection Manager\2.0\Configuration, added the permission Everyone Read to that key and voila! The service started.

 

Hope this helps someone out as I couldn't find anything regarding this issue on google.

 

Ciao :)