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POWCF ServiceHost crashes when UserNamePasswordValidator takes too long to process
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  1. POWCF ServiceHost crashes when UserNamePasswordValidator takes too long to process
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    copied!<p>I have found a situation where a WCF client can crash a WCF ServiceHost if the ServiceHost has a UserNamePasswordValidator that takes a while to process. I would like to hear any suggestions on solutions before I go throw this at Microsoft.</p> <p>The steps to reproduce is:</p> <ol> <li>Open a channel</li> <li>Call an API method which takes 10 seconds to return.</li> <li>Close the channel before API method returns.</li> <li>API method returns. ServiceHost crashes.</li> </ol> <p>The above only happens if UserNamePasswordValidator takes a while to process (my example, 2 seconds sleep). If UserNamePasswordValidator returns immediately, the above situation changes:</p> <ol> <li>Open a channel</li> <li>Call an API method which takes 10 seconds to return.</li> <li>Close the channel before API method returns.</li> <li>Closing channel waits on pending API method call.</li> <li>API method returns.</li> <li>Channel gets closed. Everything is good.</li> </ol> <p>The client code is as follows:</p> <pre><code>public static void Main(string[] args) { var binding = new NetTcpBinding(SecurityMode.TransportWithMessageCredential); binding.Security.Message.ClientCredentialType = MessageCredentialType.UserName; var identity = new DnsEndpointIdentity("Dummy"); var endpointAddress = new EndpointAddress(new Uri("net.tcp://localhost:5000/"), identity); var channelFactory = new ChannelFactory&lt;IService&gt;(binding, endpointAddress); channelFactory.Credentials.ServiceCertificate.Authentication.CertificateValidationMode = X509CertificateValidationMode.None; channelFactory.Credentials.UserName.UserName = "foo"; channelFactory.Credentials.UserName.Password = "bar"; channelFactory.Open(); IService service = channelFactory.CreateChannel(); ThreadPool.QueueUserWorkItem(CallPingOnChannel, service); Thread.Sleep(TimeSpan.FromSeconds(1)); channelFactory.Close(); } private static void CallPingOnChannel(object state) { var result = ((state) as IService).Ping(); } </code></pre> <p>The ServiceHost is set up as follows:</p> <pre><code>public static void Main(string[] args) { var serviceHost = new ServiceHost(typeof(Service), TcpBaseAddress); serviceHost.Description.Behaviors.Add(new ErrorHandler()); var netTcpBinding = new NetTcpBinding(SecurityMode.TransportWithMessageCredential); netTcpBinding.Security.Transport.ClientCredentialType = TcpClientCredentialType.Certificate; netTcpBinding.Security.Message.ClientCredentialType = MessageCredentialType.UserName; serviceHost.Credentials.UserNameAuthentication.UserNamePasswordValidationMode = UserNamePasswordValidationMode.Custom; serviceHost.Credentials.UserNameAuthentication.CustomUserNamePasswordValidator = new UserValidator(); serviceHost.Credentials.ClientCertificate.Authentication.CertificateValidationMode = X509CertificateValidationMode.None; serviceHost.Credentials.ServiceCertificate.Certificate = GetCertificate(); serviceHost.AddServiceEndpoint(typeof(IService), netTcpBinding, ""); serviceHost.Open(); Console.ReadLine(); } </code></pre> <p>And the UserValidator is implemented as follows:</p> <pre><code>public class UserValidator : UserNamePasswordValidator { public override void Validate(string userName, string password) { Thread.Sleep(TimeSpan.FromSeconds(2)); } } </code></pre> <p>The unhandled exception which causes the main thread to crash is:</p> <pre><code>System.ServiceModel.CommunicationException: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '10675199.02:48:05.4775807'. ---&gt; System.IO.IOException: The read operation failed, see inner exception. ---&gt; System.ServiceModel.CommunicationException: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '10675199.02:48:05.4775807'. ---&gt; System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host </code></pre>
 

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