Question

我有一个带有三个WCF服务的程序，当我在本地运行它们时（即：服务器和客户端都在localhost上）一切正常。但是，当我通过网络测试它时，我得到两个服务的TimoutException而不是另一个服务。我已经在测试中涉及的所有机器上禁用了防火墙。我可以ping服务器并从客户端访问wsdl“你已经创建了一个服务”网页

有效的服务使用BasicHttpBinding和流，两个不工作使用WSDualHttpBinding。使用WSDualHttpBinding的服务都有CallbackContracts。我为这个问题的模糊性道歉，但我不确定要包含哪些代码，或者甚至在哪里开始寻找解决方案。

非工作绑定：

public static Binding CreateHTTPBinding()
{
  var binding = new WSDualHttpBinding();

  binding.MessageEncoding = WSMessageEncoding.Mtom;

  binding.MaxBufferPoolSize = 2147483647;
  binding.MaxReceivedMessageSize = 2147483647;
  binding.Security.Mode = WSDualHttpSecurityMode.None;
  return binding;
}

异常堆栈跟踪：

Unhandled Exception: System.TimeoutException: The open operation did not complete within the allotted timeout of 00:01:00. The time allotted to this operation may have been a portion of a longer timeout.

Server stack trace:
   at System.ServiceModel.Channels.ReliableRequestor.ThrowTimeoutException()
   at System.ServiceModel.Channels.ReliableRequestor.Request(TimeSpan timeout)
   at System.ServiceModel.Channels.ClientReliableSession.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ClientReliableDuplexSessionChannel.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.CallOpenOnce.System.ServiceModel.Channels.ServiceChannel.ICallOnce.Call(ServiceChannel channel, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
   at System.ServiceModel.Channels.ServiceChannel.EnsureOpened(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at IDemeService.Register()
   at DemeServiceClient.Register()
   at DemeClient.Client.Start()
   at DemeClient.Program.Main(String[] args)

Answer 1

您可以在两端启用System.Net跟踪并阅读有关超时异常的信息。

http://support.microsoft.com/kb/947285

Answer 2

您正在使用DualHttpBinding。这意味着您正在设置双工通道，其中服务器可以向客户端发送消息（不是响应消息，而是传入消息）。但是您没有设置clientBaseAddress客户端将侦听来自服务器的传入消息。这就是造成这个问题的原因。来自http://msdn.microsoft.com/en-us/library/system.servicemodel.wsdualhttpbinding.aspx：

此绑定要求客户端具有公共URI，该URI为服务提供回调端点。这是由ClientBaseAddress提供的。双重绑定将客户端的IP地址暴露给服务。客户端应使用安全性来确保它只连接到它信任的服务。

TimoutException通过网络发生，但不在本地发生

2 个答案: