System.TimeoutException in "Hello World" sample

System.TimeoutException in "Hello World" sample

• BlogusMaximus

  Another small comment :) because it twists my head  

  In first reply to "Why close proxy " thread, Michele wrote this:

  "The proxy inherits ClientBase<T> which provides a Close() method to close the communication channel. It also implements IDisposable which will ultimately call Close() if you forget, but that relies on garbage collection which is nondeterministic. So, better if you close."

  I understand this. Proxy really inherits Dispose method from ClientBase<T> and by surrounding proxy creation with using statement, everything works fine without explicitly calling Close on it. So, Dispose method probably calls Close or do quite similar work as Close (confirmed by .net reflector)

   

  Its clear from my experiments that when proxy is not Closed or Disposed explicitly (by using(...) for example), Dispose method is not called.

  From what i know about IDisposable objects (thus object which allocate unmanaged resources which is true for ClientBase i guess), they should always have finalizer which calls Dispose() method... (NET Framework Resource Management )

   

  did i miss something

  thanx

  
  

• CosmicSheep

  Exactly ! So, where there are some (unmanaged) resources that must be disposed and call to Dispose (or Close) is not optional but necessary, class implementing IDisposable should have finalizer calling Dispose.....

  That was my point.

  I just dont know if this is the case for situation i described (call to ServiceHost.Close timeouted after not calling Close on client proxy) . Maybe this behaviour is "by design"....

  Thanx

  
  

• John Colaizzi

  I can confirm that calling Close on client proxy solved problem on JanCTP

  Thank you too :)

  
  

• Javafun

  sorry,I thought you have problem with sending messages,anyway i am trying to repro your problem in Feb ctp

  please install Feb ctp,so you can play with recent bits

  -Thank you

  Madhu

  
  
  

• Drakx

  I'm sure I'v changed both server and client - like I said - client succesfully called server and exception was thrown when closing ServiceHost.....

  But, I'l do what You advice - dowload and try Feb CTP :)

  Thanx

  
  

• Jobs

   

  in jan ctp,in some cases,wcf runtime didn't report error,it waits for some time and then we get timeout exception.

  please install feb ctp,it is billion times better than Jan ctp

  http://blogs.msdn.com/madhuponduru/archive/2006/02/22/537622.aspx

  I am thinking may be mis matching binding causing this problem,can you please make sure you changed binding in both client and server

  //when you are adding binding programmatically,we don't need config on server side

  My service code:

  using System;

  using System.Collections.Generic;

  using System.Text;

  using System.ServiceModel;

   

  namespace HelloService
  {

      class Program
      {

          static void Main(string[] args)
          {

   

              Uri baseURI = new Uri("http://localhost/hello");

              ServiceHost HService = new

              ServiceHost(typeof(HelloService), baseURI);

              HService.AddServiceEndpoint(typeof(HelloService),

                                     new WSHttpBinding(), baseURI);

   

              HService.Open();

              Console.WriteLine("Service at your service.");

              Console.ReadKey();

              HService.Close();

   

          }

      }

   

      [ServiceContract]

      class HelloService
      {

          [OperationContract]

          string sayHi()
          {

              return ("Hi!");

   

          }

      }

  }

  client code:

  using System;
  using System.Collections.Generic;
  using System.Text;
  using System.ServiceModel;
  using clientapp.localhost;

  
  namespace HelloClient
  {

      class Program
      {

          static void Main(string[] args)
          {

              HelloServiceProxy p = new HelloServiceProxy();

              Console.WriteLine(p.sayHi());
              Console.ReadKey();
          }

      }

  }

  client config:

  < xml version="1.0" encoding="utf-8" >
  <configuration>
      <system.serviceModel>
          <bindings>
            
              <wsHttpBinding>
                  <binding name="WSHttpBinding_HelloService" bypassProxyOnLocal="false"
                      transactionFlow="false" hostNameComparisonMode="StrongWildcard"
                      maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                      messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true">
                      <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647"
                          maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
                      <reliableSession ordered="true" inactivityTimeout="00:10:00"
                          enabled="false" />
                      <security mode="Message">
                          <transport clientCredentialType="None" proxyCredentialType="None"
                              realm="" />
                          <message clientCredentialType="Windows" negotiateServiceCredential="true"
                              establishSecurityContext="true" />
                      </security>
                  </binding>
              </wsHttpBinding>
          </bindings>
          <client>
              <endpoint address="http://localhost/hello" binding="wsHttpBinding"
                  bindingConfiguration="WSHttpBinding_HelloService" contract="clientapp.localhost.HelloService"
                  name="WSHttpBinding_HelloService" />
          </client>
      </system.serviceModel>
  </configuration>

  MORE INFO;

  SDK smaples is best resource to learn more about wcf

  http://windowssdk.msdn.microsoft.com/library/default.asp url=/library/en-us/WCF_samples/html/d6a47b3e-75c7-45c6-88ea-658868276669.asp

  we have wcf seminars here

  http://windowscommunication.net/default.aspx tabindex=3&tabid=45

  -Thank you

  Madhu

   

  
  
  

• Ran-Solo

  //If you close the proxy after you are done with the call,everything will be ok(client side)

  HelloServiceProxy p = new HelloServiceProxy();

  Console.WriteLine(p.sayHi());
  p.Close();
  Console.ReadKey();

  //If service host thinks,it has any active client connections,it has problem closing the service host,I am not sure this bug or by design,we will try to debug it

  //Feb ctp giving better error message

  Unhandled Exception: System.TimeoutException: The service's security session did
  not receive a 'close' message from the client within the configured time.

  
  at System.ServiceModel.Security.SecuritySessionServerSettings.ServerSecurityS
  implexSessionChannel.OnClose(TimeSpan timeout)
  at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
  at System.ServiceModel.Channels.ChannelManagerBase.CloseChannels(TimeSpan tim
  eout)
  at System.ServiceModel.Channels.SecurityChannelListener`1.OnClose(TimeSpan ti
  meout)
  at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
  at System.ServiceModel.Channels.ChannelListenerBase.OnClose(TimeSpan timeout)

  at System.ServiceModel.Channels.DelegatingChannelListener`1.OnClose(TimeSpan
  timeout)
  at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
  at System.ServiceModel.Dispatcher.ChannelDispatcher.OnClose(TimeSpan timeout)

  at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
  at System.ServiceModel.ServiceHostBase.OnClose(TimeSpan timeout)
  at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
  at System.ServiceModel.Channels.CommunicationObject.Close()
  at HelloService.Program.Main(String[] args) in C:\Documents and Settings\madh

  -Thank you

  Madhu

  
  
  

• rkcarroll

  WCF is no diferent from the rest of .NET:
  IDisposable has absolutely nothing to do with garbage collection. It is up to you to call it, and there is no magic that does it for you.

  Thanks,

  Juval Lowy IDesign Inc.

  
  
• System.TimeoutException in "Hello World" sample