wcf - 通讯对象不能用于通讯，因为它已被中止

Question

我有一个示例 WCF 项目，它重现了我在真实 WCF 应用程序中遇到的问题。
您可以下载我的示例 WCF 应用程序的源代码 here

根据代码和配置文件中的超时设置，我不明白发生了什么:

**** Server exception : System.ServiceModel.CommunicationObjectAbortedException: 

The communication object, System.ServiceModel.Security.SecuritySessionServerSettings+SecurityReplySessionChannel, cannot be used for communication because it 
has been Aborted.

   at System.ServiceModel.Channels.CommunicationObject.ThrowIfClosedOrNotOpen()
   at System.ServiceModel.Security.SecuritySessionServerSettings.ServerSecuritySessionChannel.SecureApplicationMessage(Message& message, TimeSpan timeout, SecurityProtocolCorrelationState correlationState)
   at System.ServiceModel.Security.SecuritySessionServerSettings.SecuritySessionRequestContext.OnReply(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.RequestContextBase.Reply(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.RequestContextBase.Reply(Message message)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.Reply(MessageRpc& rpc)

**** client exception : : System.ServiceModel.Security.MessageSecurityException: An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail. ---> System.ServiceModel.FaultException: The message could not be processed. This is most likely because the action 'http://schemas.xmlsoap.org/ws/2005/02/trust/RST/SCT/Cancel' is incorrect or because the message contains an invalid or expired security context token or because there is a mismatch between bindings. The security context token would be invalid if the service aborted the channel due to inactivity. To prevent the service from aborting idle sessions prematurely increase the Receive timeout on the service endpoint's binding.
   --- End of inner exception stack trace ---

Server stack trace: 
   at System.ServiceModel.Security.SecuritySessionClientSettings`1.ClientSecuritySessionChannel.ProcessRequestContext(RequestContext requestContext, TimeSpan timeout, SecurityProtocolCorrelationState correlationState)
   at System.ServiceModel.Security.SecuritySessionClientSettings`1.ClientSecuritySessionChannel.ReceiveInternal(TimeSpan timeout, SecurityProtocolCorrelationState correlationState)
   at System.ServiceModel.Security.SecuritySessionClientSettings`1.SecurityRequestSessionChannel.CloseOutputSession(TimeSpan timeout)
   at System.ServiceModel.Security.SecuritySessionClientSettings`1.ClientSecuritySessionChannel.CloseSession(TimeSpan timeout, Boolean& wasAborted)
   at System.ServiceModel.Security.SecuritySessionClientSettings`1.ClientSecuritySessionChannel.OnClose(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.OnClose(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)

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 System.ServiceModel.ICommunicationObject.Close(TimeSpan timeout)
   at System.ServiceModel.ClientBase`1.System.ServiceModel.ICommunicationObject.Close(TimeSpan timeout)
   at System.ServiceModel.ClientBase`1.Close()
   at System.ServiceModel.ClientBase`1.System.IDisposable.Dispose()
   at WindowsFormsApplication1.Program.Main() in C:\Users\sdoucet\Documents\Visual Studio 2008\Projects\TestWCFLongExecution\WindowsFormsApplication1\Program.cs:line 25

Answer 1

我们遇到了类似的问题，因为托管服务的应用程序池配置为最大工作进程数大于 1。要成功调用 Abort 或 Close，它需要路由到处理原始请求的同一服务实例。