WCF service on ServiceBus fails if call longer than 1 minute - wcf

Question

I have a WCF Service that is hosted in a ServiceHost object. The ServiceHost is created on the OnStart method of an Azure Worker Role. Here is the code:
ServiceBusEnvironment.SystemConnectivity.Mode = ConnectivityMode.Http;
Uri baseAddress = ServiceBusEnvironment.CreateServiceUri("http", "my_sb", "SimpleService");
host = new ServiceHost(typeof(SimpleService1.Service1), baseAddress);
BasicHttpRelayBinding binding = new BasicHttpRelayBinding(EndToEndBasicHttpSecurityMode.None, RelayClientAuthenticationType.None);
binding.OpenTimeout = new TimeSpan(1, 1, 0);
binding.ReceiveTimeout = new TimeSpan(1, 10, 0);
binding.SendTimeout = new TimeSpan(1, 10, 0);
binding.MaxReceivedMessageSize = 73400320;
XmlDictionaryReaderQuotas readerQuotas = new XmlDictionaryReaderQuotas();
readerQuotas.MaxArrayLength = 73400320;
binding.ReaderQuotas = readerQuotas;
TransportClientEndpointBehavior sharedSecretServiceBusCredential = new TransportClientEndpointBehavior();
sharedSecretServiceBusCredential.CredentialType = TransportClientCredentialType.SharedSecret;
sharedSecretServiceBusCredential.Credentials.SharedSecret.IssuerName = "owner";
sharedSecretServiceBusCredential.Credentials.SharedSecret.IssuerSecret = "blablablabla==";
ContractDescription contractDescription = ContractDescription.GetContract(typeof(SimpleService1.IService1), typeof(SimpleService1.Service1));
ServiceEndpoint serviceEndPoint = new ServiceEndpoint(contractDescription);
serviceEndPoint.Address = new EndpointAddress(baseAddress);
serviceEndPoint.Binding = binding;
IEndpointBehavior serviceRegistrySettings = new ServiceRegistrySettings(DiscoveryType.Public);
serviceEndPoint.Behaviors.Add(serviceRegistrySettings);
serviceEndPoint.Behaviors.Add(sharedSecretServiceBusCredential);
host.Description.Endpoints.Add(serviceEndPoint);
try
{
host.Open();
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message, "Error");
throw;
}
Trace.WriteLine("SimpleService1 running...");
and the binding configuration on the client side is:
<basicHttpBinding>
<binding name="FileTransferBinding" closeTimeout="00:10:00" openTimeout="00:10:00" receiveTimeout="00:10:00" sendTimeout="00:10:00" maxReceivedMessageSize="73400320">
<readerQuotas maxArrayLength="73400320"/>
<security mode="None"/>
</binding>
</basicHttpBinding>
and
<endpoint address="http://my_sb.servicebus.windows.net/simpleservice" binding="basicHttpBinding" bindingConfiguration="FileTransferBinding" contract="Service1reference.IService1" name="FileTransferBinding" behaviorConfiguration="sbBehavior"/>
The problem is that if one call to the service takes longer than 1 minute, the client receives this exception:
The content type application/xml; charset=utf-8 of the response message does not match the content type of the binding (text/xml; charset=utf-8). If using a custom encoder, be sure that the IsContentTypeSupported method is implemented properly
If I change the binding to a netTcpRelayBinding everything works fine.

Answer 1

This is because the Windows Azure load-balancer disconnects you if the connection is idle for more than a minute.
Your best bet is to use a WCF callback. This will execute a call from the server to the client to let it know that the long-running operation has completed. For more on how to do this have a look at this blog [WCF Callbacks