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With ServiceBus scale-out, when call UseServiceBus at app_start return error like time out for connection, then all clients signalr/hubs request will return that error #2524

halter73 opened this Issue Sep 5, 2013 · 4 comments


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halter73 commented Sep 5, 2013

With ServiceBus scale-out valid connectionString and active ServiceBus Topic, when call UseServiceBus at app_start, if it returns error like time out on init connection to ServiceBus, then on all clients the requests signalr/hubs or requests signalr/negotiate to that server will get that error e.g. below, in this case SignalR can’t never work on that server if AppDomain /process not restart.

Since connection is valid and ServiceBus Topic is active, so SignalR should not always return error/ never work in this case.

This only repro on ServiceBus scale-out.

(With SqlServer and Redis, the requests signalr/hubs and requests signalr/negotiate don’t get any error for connection to scale-out, new client still can connect to scale-out in this case)

Error on all clients requests signalr/hubs or requests signalr/negotiate to the server when time out on init connection to ServiceBus from call UseServiceBus at app_start:

[WebException: The request was aborted: The request was canceled.]
   System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) +8606787
   Microsoft.ServiceBus.Messaging.CreateOrUpdateAsyncResult`1.<GetAsyncSteps>b__d(CreateOrUpdateAsyncResult`1 thisPtr, IAsyncResult r) +35
   Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result) +358

[TimeoutException: The request has timed out after 60000 milliseconds. The successful completion of the request cannot be determined. Additional queries should be made to determine whether or not the operation has succeeded.]
   Microsoft.ServiceBus.Common.AsyncResult.End(IAsyncResult result) +576
   Microsoft.ServiceBus.NamespaceManager.CreateSubscription(SubscriptionDescription description) +250
   Microsoft.AspNet.SignalR.ServiceBus.ServiceBusConnection.Subscribe(IList`1 topicNames, Action`2 handler, Action`2 errorHandler) +967
   Microsoft.AspNet.SignalR.ServiceBus.ServiceBusMessageBus..ctor(IDependencyResolver resolver, ServiceBusScaleoutConfiguration configuration) +562
   Microsoft.AspNet.SignalR.<>c__DisplayClass2.<UseServiceBus>b__0() +44
   System.Lazy`1.CreateValue() +455
   Microsoft.AspNet.SignalR.<>c__DisplayClass2.<UseServiceBus>b__1() +139
   Microsoft.AspNet.SignalR.DefaultDependencyResolver.Track(Func`1 creator) +39
   Microsoft.AspNet.SignalR.DefaultDependencyResolver.GetService(Type serviceType) +231
   Microsoft.AspNet.SignalR.DependencyResolverExtensions.Resolve(IDependencyResolver resolver) +64
   Microsoft.AspNet.SignalR.PersistentConnection.Initialize(IDependencyResolver resolver, HostContext context) +57
   Microsoft.AspNet.SignalR.Owin.CallHandler.Invoke(IDictionary`2 environment) +839
   Microsoft.AspNet.SignalR.Owin.Handlers.HubDispatcherHandler.Invoke(IDictionary`2 environment) +333
   Microsoft.Owin.Host.SystemWeb.OwinCallContext.Execute() +180
   Microsoft.Owin.Host.SystemWeb.OwinHttpHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object extraData) +414
   Microsoft.Owin.Host.SystemWeb.CallContextAsyncResult.End(IAsyncResult result) +180
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +606
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288



abnanda1 commented Oct 7, 2013

@Xiaohongt we need the repro steps for this soon.


abnanda1 commented Oct 15, 2013

@Xiaohongt can you please repro this to see if this issue is still there?


Xiaohongt commented Oct 15, 2013

I verified that other error is handled in retry, and read the source code that this error should also be handled in retry.

Since we can't control SB throw TimeoutException, so it is very difficult to repro this, probably we can add unit test for it

@ghost ghost assigned abnanda1 Oct 16, 2013


abnanda1 commented Oct 16, 2013

We can't really add a unit test for this so I am closing this for now. We can reopen it if it comes up again.

@abnanda1 abnanda1 closed this Oct 16, 2013

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