c# – 服务期间的WCF呼叫OnShutDown()

我在我的服务器上运行了WCF服务,并且我试图通过覆盖“OnShutDown()”来关闭服务器时发送状态消息.

这可以看作如下：

protected override void OnShutdown()
           {
               try
               {
                   client.updateInvStatus(machineName,"Client Host Has Shutdown");
               }
               catch (Exception ex)
               {
                   EH.writeToErrorLog("||OnShutdown||Error Shutting Down System rn" + ex);

               }
               base.OnShutdown();
           }

这似乎在50％的时间内起作用,另外50％我得到以下错误：

System.ServiceModel.Security.SecurityNegotiationException: Could not establish secure         channel for SSL/TLS with authority '"ENDPOINT ADDRESS REMOVED'. --->     System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.
   at System.Net.HttpWebRequest.GetResponse()
   at    System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitF orReply(TimeSpan timeout)
 --- End of inner exception stack trace ---

Server stack trace: 
   at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebExceptoon webException,HttpWebRequest request,HttpAbortReason abortReason)
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   at System.ServiceModel.Channels.RequestChannel.Request(Message message,TimeSpan timeout)
   at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message,TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action,Boolean oneway,ProxyOperationRuntime operation,Object[] ins,Object[] outs,TimeSpan timeout)
   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 Ascertain.AscertainAgent.IService.updateInvStatus(String hostNM,String invValue)
   at Ascertain.AscertainAgent.ServiceClient.updateInvStatus(String hostNM,String invValue) in C:UsersdaladdDocumentsCSAscertainAscertainAscertainService ReferencesAscertainAgentReference.cs:line 209
   at Ascertain.Service1.OnShutdown() in       "FILE LOCATION REMOVED"Service1.cs:line224

有没有人有任何想法为什么会发生这种情况？