WebHost failed to process a request.

Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/28316044

Exception: System.ServiceModel.ServiceActivationException: The service '/-------/BrokeredMessageService.svc' cannot be activated due to an exception during compilation.  The exception message is: Generic: There was an authorization failure. Make sure you have specified the correct SharedSecret, SimpleWebToken or Saml transport client credentials.. ---> Microsoft.ServiceBus.AuthorizationFailedException: Generic: There was an authorization failure. Make sure you have specified the correct SharedSecret, SimpleWebToken or Saml transport client credentials.

   at Microsoft.ServiceBus.RelayedOnewayTcpClient.ConnectRequestReplyContext.Send(Message message, TimeSpan timeout, IDuplexChannel& channel)

   at Microsoft.ServiceBus.RelayedOnewayTcpListener.RelayedOnewayTcpListenerClient.Connect(TimeSpan timeout)

   at Microsoft.ServiceBus.RelayedOnewayTcpClient.EnsureConnected(TimeSpan timeout)

   at Microsoft.ServiceBus.Channels.CommunicationObject.Open(TimeSpan timeout)

   at Microsoft.ServiceBus.Channels.RefcountedCommunicationObject.Open(TimeSpan timeout)

   at Microsoft.ServiceBus.RelayedOnewayChannelListener.OnOpen(TimeSpan timeout)

   at Microsoft.ServiceBus.Channels.CommunicationObject.Open(TimeSpan timeout)

   at System.ServiceModel.Dispatcher.ChannelDispatcher.OnOpen(TimeSpan timeout)

   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)

   at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout)

   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)

   at Microsoft.ServiceBus.SocketConnectionTransportManager.OnOpen(TimeSpan timeout)

   at Microsoft.ServiceBus.Channels.TransportManager.Open(TimeSpan timeout, TransportChannelListener channelListener)

   at Microsoft.ServiceBus.Channels.TransportManagerContainer.Open(TimeSpan timeout, SelectTransportManagersCallback selectTransportManagerCallback)

   at Microsoft.ServiceBus.SocketConnectionChannelListener`2.OnOpen(TimeSpan timeout)

   at Microsoft.ServiceBus.Channels.CommunicationObject.Open(TimeSpan timeout)

   at Microsoft.ServiceBus.Channels.CommunicationObject.Open(TimeSpan timeout)

   at System.ServiceModel.Dispatcher.ChannelDispatcher.OnOpen(TimeSpan timeout)

   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)

   at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout)

   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)

   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath)

   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)

   --- End of inner exception stack trace ---

   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)

   at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath)

Process Name: w3wp

Process ID: 8056

As recommended by the error message I checked everything about the application configuration and also the keys and eventually I found the problem.

When I set the permissions in the ACS rule group I had copied and pasted the claim name for net.windows.servicebus.action from the Azure portal and hadnt spotted the <space> character on the end of it like you sometimes pick up when copying text in the browser.  This meant that the listen and send permissions were not setup correctly which is why (as you would expect) my two applications could not connect to the service bus.

So lesson learnt here, if you do copy and paste into the ACS rules just be careful you dont leave a space on the end of anything otherwise it will be difficult to spot that its configured incorrectly