WCF底层连接已关闭:接收上发生意外错误

Question

我正在使用RestClient应用程序与我的WCF服务进行通信.我收到以下异常

The underlying connection was closed: An unexpected error occurred on a receive.

这是我使用的C#代码

            string q = string.Format(@"xxxxxxxxxxxxxxxxxxxxxxxxxxx");
            WebClient client = new WebClient();
            string Url = string.Format("{0}/Get?queries={1}", BaseUrl,HttpUtility.UrlEncodeUnicode(q));
            client.Headers.Add(HttpRequestHeader.ContentType, "application/json");
            var result = client.DownloadString(Url);
            Console.WriteLine("======================output================================");
            Console.WriteLine(result);
            Console.WriteLine("===========================================");

这是错误消息

System.Net.WebException was caught
  HResult=-2146233079
  Message=The underlying connection was closed: An unexpected error occurred on a receive.
  Source=System
  StackTrace:
       at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)
       at System.Net.WebClient.DownloadString(Uri address)
       at System.Net.WebClient.DownloadString(String address)
       at RestClient.Program.GetRecordsTest() in C:\Users\Wiemon\Downloads\RestAppClient\RestAppClient\Program.cs:line 118
  InnerException: System.IO.IOException
       HResult=-2146232800
       Message=Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
       Source=System
       StackTrace:
            at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
            at System.Net.Security._SslStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
            at System.Net.Security._SslStream.StartReading(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
            at System.Net.Security._SslStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
            at System.Net.Security._SslStream.Read(Byte[] buffer, Int32 offset, Int32 count)
            at System.Net.TlsStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)
       InnerException: System.Net.Sockets.SocketException
            HResult=-2147467259
            Message=An existing connection was forcibly closed by the remote host
            Source=System
            ErrorCode=10054
            NativeErrorCode=10054
            StackTrace:
                 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)
            InnerException: 

这是我的约束力

<binding name="wsHttpEndpoint" >
                    <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="16384" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />
                    <security mode="Transport">
                        <transport clientCredentialType="Certificate" />
                        <message clientCredentialType="Certificate" />
                    </security>
                </binding>

和我的端点行为,而不是我设置maxItemsInObjectGraph ="2147483647"

<behavior name="MyEndpointBehavior">
                    <dataContractSerializer maxItemsInObjectGraph="2147483647" />
                    <clientCredentials>
                        <clientCertificate findValue="xxxxxxxxxxxxxxxxxx" x509FindType="FindBySubjectName" storeLocation="LocalMachine" storeName="My" />
                        <serviceCertificate>
                            <authentication certificateValidationMode="None" revocationMode="NoCheck" />
                        </serviceCertificate>
                    </clientCredentials>
                </behavior>

Answer 1

它的共同(通用)消息.

您应该使用跟踪查看器工具(SvcTraceViewer.exe)来查找服务器错误

Answer 2

我在 WCF 中的 http 绑定深处遇到了类似的错误。

客户端 -> 底层连接已关闭：接收时发生意外错误。

客户端 -> 无法从传输连接读取数据：现有连接被远程主机强制关闭。

服务器（在“procdump”的帮助下获得此信息）-> 由于线程退出或应用程序请求，I/O 操作已中止

最终，几个小时后，我发现了 HTTP.sys 日志记录（在 C:\WINDOWS\System32\LogFiles\HTTPERR 中），并且发现 WCF 自托管服务连接由于一个模糊的配置问题而被强制删除（故意） （每秒最小发送字节数）。不幸的是，又花了几个小时来重新配置（您无法通过“netsh http add timeout”来完成此操作，因此您必须在应用程序中或非自托管时在 IIS 中执行此操作）。