Getting a SessionLockLostException when trying to complete a message

I’m receiving messages using a session id “Commands” on a RequireSesssion=true subscription. I am using sessions so that I can make sure that my “command” messages are executed in the appropriate order. In my case some messages will be deferred while a range of other sub-commands do their job.

Unfortunately I cannot yet reproduce the issue in a simplified code example. But the steps in my code are as follows:

1. Create a SubscriptionClient and call AcceptMessageSessionAsync() on it
2. On the received session, start a loop to receive messages with session. ReceiveAsync()
   1. Handle the first message
      1. Write some data to session state using session. SetStateAsync()
      2. Process a file
      3. Send messages with the same SessionId to the topic for next steps to take using SendAsync()
   2. Receive the first message generated in the previous step
      1. Send a new message to the same topic using SendAsync(). But this message intended for another subscription (with the SessionId field of the BrokeredMessage left at null)
      2. Complete the message using CompleteAsync()

The SessionLockLostException is thrown at step 2.2.2.

Some experimentation showed that the exception is only thrown if I also execute step 2.2.1.

If I replace step 2.2.1 with just a Task.Delay(), then the message completes successfully.

I wonder if I am trying to do something with sessions that is not supported. I haven’t yet found good documentation on brokered message sessions features yet.

This is the exception:

Microsoft.ServiceBus.Messaging.SessionLockLostException was caught
  _HResult=-2146233088
  _message=Channel:uuid:04a0e531-3b8e-4b49-96ab-63288d9a39f7;id=2759;Link:7.TrackingId:ec3b5ee4-cfd9-462f-b2c2-cd32bb6c3656_G29_G29_B5,TimeStamp:2/11/2014 8:12:17 AM
  HResult=-2146233088
  IsTransient=false
  Message=Channel:uuid:04a0e531-3b8e-4b49-96ab-63288d9a39f7;id=2759;Link:7.TrackingId:ec3b5ee4-cfd9-462f-b2c2-cd32bb6c3656_G29_G29_B5,TimeStamp:2/11/2014 8:12:17 AM
  Source=Microsoft.ServiceBus
  StackTrace:
       at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
       at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.RunSynchronously()
       at Microsoft.ServiceBus.Messaging.MessageReceiver.OnComplete(TrackingContext trackingContext, IEnumerable`1 lockTokens, TimeSpan timeout)
       at Microsoft.ServiceBus.Messaging.MessageReceiver.Complete(TrackingContext trackingContext, IEnumerable`1 lockTokens, TimeSpan timeout)
       at Microsoft.ServiceBus.Messaging.MessageReceiver.Complete(IEnumerable`1 lockTokens, TimeSpan timeout)
       at Microsoft.ServiceBus.Messaging.ReceiveContext.Complete()
       at Microsoft.ServiceBus.Messaging.ReceiveContext.Complete()
       at Microsoft.ServiceBus.Messaging.BrokeredMessage.Complete()
       at FS.ServiceBus.Handlers.BaseBrokeredSessionHandler.<handlemessageinnerasync>d__6.MoveNext() in d:\Src\til-tfs-01\Src\ServiceBus\Handlers\BaseBrokeredSessionHandler.cs:line 105
  InnerException: System.ServiceModel.FaultException<system.servicemodel.exceptiondetail>
       _HResult=-2146233087
       _message=Channel:uuid:04a0e531-3b8e-4b49-96ab-63288d9a39f7;id=2759;Link:7.TrackingId:ec3b5ee4-cfd9-462f-b2c2-cd32bb6c3656_G29_G29_B5,TimeStamp:2/11/2014 8:12:17 AM
       HResult=-2146233087
       IsTransient=false
       Message=Channel:uuid:04a0e531-3b8e-4b49-96ab-63288d9a39f7;id=2759;Link:7.TrackingId:ec3b5ee4-cfd9-462f-b2c2-cd32bb6c3656_G29_G29_B5,TimeStamp:2/11/2014 8:12:17 AM
       RemoteStackTrace=
Server stack trace: 
   at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.ThrowIfFaultMessage(Message wcfMessage)
   at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.HandleMessageReceived(IAsyncResult result)

Exception rethrown at [0]: 
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.DuplexCorrelationAsyncResult.End(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.EndRequest(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.RequestAsyncResult.<getasyncsteps>b__4(RequestAsyncResult thisPtr, IAsyncResult r)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)

Exception rethrown at [1]: 
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Common.AsyncResult`1.End(IAsyncResult asyncResult)
   at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.EndRequest(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.RedirectBindingElement.RedirectContainerChannelFactory`1.RedirectContainerSessionChannel.RequestAsyncResult.<>c__DisplayClass17.<getasyncsteps>b__a(RequestAsyncResult thisPtr, IAsyncResult r)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)

Exception rethrown at [2]: 
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Common.AsyncResult`1.End(IAsyncResult asyncResult)
   at Microsoft.ServiceBus.Messaging.Sbmp.RedirectBindingElement.RedirectContainerChannelFactory`1.RedirectContainerSessionChannel.EndRequest(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.RequestAsyncResult.<getasyncsteps>b__4(RequestAsyncResult thisPtr, IAsyncResult r)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)

Exception rethrown at [3]: 
   at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.ServiceBus.Common.AsyncResult`1.End(IAsyncResult asyncResult)
   at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.EndRequest(IAsyncResult result)
   at Microsoft.ServiceBus.Messaging.Sbmp.SbmpTransactionalAsyncResult`1.<getasyncsteps>b__36(TIteratorAsyncResult thisPtr, IAsyncResult a)
   at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)

Exception rethrown at [4]: 

       Source=Microsoft.ServiceBus
       Action=http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher/fault
       StackTrace:
         Server stack trace: 
            at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.ThrowIfFaultMessage(Message wcfMessage)
            at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.HandleMessageReceived(IAsyncResult result)
         Exception rethrown at [0]: 
            at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
            at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.DuplexCorrelationAsyncResult.End(IAsyncResult result)
            at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.EndRequest(IAsyncResult result)
            at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.RequestAsyncResult.<getasyncsteps>b__4(RequestAsyncResult thisPtr, IAsyncResult r)
            at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
         Exception rethrown at [1]: 
            at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
            at Microsoft.ServiceBus.Common.AsyncResult`1.End(IAsyncResult asyncResult)
            at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.EndRequest(IAsyncResult result)
            at Microsoft.ServiceBus.Messaging.Sbmp.RedirectBindingElement.RedirectContainerChannelFactory`1.RedirectContainerSessionChannel.RequestAsyncResult.<>c__DisplayClass17.<getasyncsteps>b__a(RequestAsyncResult thisPtr, IAsyncResult r)
            at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
         Exception rethrown at [2]: 
            at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
            at Microsoft.ServiceBus.Common.AsyncResult`1.End(IAsyncResult asyncResult)
            at Microsoft.ServiceBus.Messaging.Sbmp.RedirectBindingElement.RedirectContainerChannelFactory`1.RedirectContainerSessionChannel.EndRequest(IAsyncResult result)
            at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.RequestAsyncResult.<getasyncsteps>b__4(RequestAsyncResult thisPtr, IAsyncResult r)
            at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
         Exception rethrown at [3]: 
            at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
            at Microsoft.ServiceBus.Common.AsyncResult`1.End(IAsyncResult asyncResult)
            at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.EndRequest(IAsyncResult result)
            at Microsoft.ServiceBus.Messaging.Sbmp.SbmpTransactionalAsyncResult`1.<getasyncsteps>b__36(TIteratorAsyncResult thisPtr, IAsyncResult a)
            at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
         Exception rethrown at [4]: 
            at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
            at Microsoft.ServiceBus.Common.AsyncResult`1.End(IAsyncResult asyncResult)
            at Microsoft.ServiceBus.Messaging.Sbmp.SbmpMessageReceiver.EndUpdateCommand(IAsyncResult result)
       InnerException:</getasyncsteps></getasyncsteps></getasyncsteps></getasyncsteps></getasyncsteps></getasyncsteps></getasyncsteps></getasyncsteps></system.servicemodel.exceptiondetail></handlemessageinnerasync>