c# - 已建立的连接被主机中的软件中止

Question

抱歉，如果这有点啰嗦，但我认为多发帖总比少发帖好。

这也是我在这里的第一篇文章，所以请原谅。

一段时间以来，我一直在努力解决这个问题。无济于事，希望那里有一个以前遇到过这种情况的天才。

这是一个间歇性问题，很难重现。我正在运行的代码只是调用一个网络服务Web 服务调用在一个循环中(因此我们可以多次执行此操作，1500 次或更多次)

这是导致错误的代码:

HttpWebRequest groupRequest = null;
WebResponse groupResponse = null;            
try
{    
    XmlDocument doc = new XmlDocument();
    groupRequest = (HttpWebRequest)HttpWebRequest.Create(String.Format(Server.HtmlDecode(Util.GetConfigValue("ImpersonatedSearch.GroupLookupUrl")),userIntranetID));
    groupRequest.Proxy = null;
    groupRequest.KeepAlive = false;
    groupResponse = groupRequest.GetResponse();
    doc.Load(groupResponse.GetResponseStream());
    foreach (XmlElement nameElement in doc.GetElementsByTagName(XML_GROUP_NAME))
    {
         foreach (string domain in _groupDomains )
         {
             try
             {
                 string group = new System.Security.Principal.NTAccount(domain, nameElement.InnerText).Translate(typeof(System.Security.Principal.SecurityIdentifier)).Value;
                 impersonationChain.Append(";").Append(group);                            
                 break;
             }
             catch{}                        
         } // loop through            
     }
 }
 catch (Exception groupLookupException)
 {
     throw new ApplicationException(String.Format(@"Impersonated Search ERROR:  Could not find groups for user<{0}\{1}>", userNTDomain, userIntranetID), groupLookupException);
 }
 finally
 {
     if ( groupResponse != null )
     {
         groupResponse.Close();
     }
 }

这是有时会发生的错误:

Could not find groups for user<DOMAIN\auser> ---> System.IO.IOException: Unable to read
data from the transport connection: An established connection was aborted by the
software in your host machine. ---> System.Net.Sockets.SocketException: An established  
connection was aborted by the software in your host machine at  
System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags  
socketFlags) at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32  
size) --- End of inner exception stack trace --- at System.Net.ConnectStream.Read(Byte[]  
buffer, Int32 offset, Int32 size) at System.Xml.XmlTextReaderImpl.ReadData() at  
System.Xml.XmlTextReaderImpl.ParseDocumentContent() at  
System.Xml.XmlLoader.LoadDocSequence  
(XmlDocument parentDoc) at System.Xml.XmlDocument.Load(XmlReader reader) at
System.Xml.XmlDocument.Load(Stream inStream) at  
MyWebServices.ImpersonatedSearch.PerformQuery(QueryParameters parameters,  
String userIntranetID, String userNTDomain)--- End of inner exception stack trace  
---at MyWebServices.ImpersonatedSearch.PerformQuery(QueryParameters parameters, String userIntranetID, String userNTDomain)  
--- End of inner exception stack trace ---  
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message,  
WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName,  
Object[] parameters) at MyProgram. MyWebServices.ImpersonatedSearch.PerformQuery  
(QueryParameters parameters, String userIntranetID, String userNTDomain)  
at MyProgram.MyMethod()

抱歉，要通读的代码太多了。
这种情况在大约 1700 次中发生了大约 30 次

Answer 1

您可能遇到了超时。首先，重新打开keepalive。其次，检查请求和回复的时间戳。如果发送方和接收方之间存在防火墙，请确保它不会因为空闲超时而关闭连接。我过去遇到过这两个问题，尽管使用的是通用套接字编程，而不是数据库的东西。