系统上线快一年了，一直没有完整的查看过日志，一般都是出了问题去翻日志，现在把错误日志发到我的邮箱里面，才发现，基本上每天几十个WCF的连接错误。程序开了大概十几个线程，每个线程大概三分钟访问一次WCF。不同的线程里面都报过错误。
首先这些服务在宏观上运行正常，也就是说，并不是每次都出错，因为该有的数据也都正常地来了，如果传输失败，下次传输成功的时候会弥补这次失败，所以，应该不是一直出错，是有一定的几率出错。所以，找不出是什么原因，我是真的解决不了了，需要专业的大神们分析一下，真的非常感谢。
调用WCF服务的方式如下：
if (client == null)
{
client = new TClient();
}
try
{
act(client);
client.Close();
}
catch (TimeoutException timeProblem)
{
client.Abort();
throw timeProblem;
}
// Standard communication fault handler.
catch (CommunicationException commProblem)
{
client.Abort();
throw commProblem;
}
catch (Exception ex)
{
client.Abort();
throw ex;
}
出现的错误：
错误类型一
WCF调用异常-The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.
System.ServiceModel.CommunicationException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server. ---> System.Net.WebException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server. ---> System.IO.IOException: Unable to read data from the transport connection: 您的主机中的软件中止了一个已建立的连接。. ---> System.Net.Sockets.SocketException: 您的主机中的软件中止了一个已建立的连接。
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.Sockets.NetworkStream.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)
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.GetResponse()
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
--- End of inner exception stack trace ---
Server stack trace:
at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException 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)
错误类型二
WCF调用异常-The request channel timed out while waiting for a reply after 00:00:59.9843750. Increase the timeout value passed to the call to Request or increase the SendTimeout value on the Binding. The time allotted to this operation may have been a portion of a longer timeout.
System.TimeoutException: The request channel timed out while waiting for a reply after 00:00:59.9843750. Increase the timeout value passed to the call to Request or increase the SendTimeout value on the Binding. The time allotted to this operation may have been a portion of a longer timeout. ---> System.TimeoutException: The HTTP request to 'http://****/***.svc' has exceeded the allotted timeout of 00:01:00 while reading the response. The time allotted to this operation may have been a portion of a longer timeout. ---> System.Net.WebException: The operation has timed out.
at System.Net.ConnectStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.ServiceModel.Channels.PreReadStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.ServiceModel.Channels.HttpInput.WebResponseHttpInput.WebResponseInputStream.Read(Byte[] buffer, Int32 offset, Int32 count)
--- End of inner exception stack trace ---
at System.ServiceModel.Channels.HttpInput.WebResponseHttpInput.WebResponseInputStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.ServiceModel.Channels.MaxMessageSizeStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.ServiceModel.Channels.DetectEofStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.BufferedStream.Read(Byte[] array, Int32 offset, Int32 count)
at System.Xml.EncodingStreamWrapper.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.Xml.XmlBufferReader.TryEnsureBytes(Int32 count)
at System.Xml.XmlUTF8TextReader.BufferElement()
at System.Xml.XmlUTF8TextReader.ReadStartElement()
at System.Xml.XmlUTF8TextReader.Read()
at System.ServiceModel.Channels.ReceivedMessage.ReadStartEnvelope(XmlDictionaryReader reader)
at System.ServiceModel.Channels.StreamedMessage..ctor(XmlDictionaryReader reader, Int32 maxSizeOfHeaders, MessageVersion desiredVersion)
at System.ServiceModel.Channels.Message.CreateMessage(XmlDictionaryReader envelopeReader, Int32 maxSizeOfHeaders, MessageVersion version)
at System.ServiceModel.Channels.TextMessageEncoderFactory.TextMessageEncoder.ReadMessage(Stream stream, Int32 maxSizeOfHeaders, String contentType)
at System.ServiceModel.Channels.HttpInput.ReadStreamedMessage(Stream inputStream)
at System.ServiceModel.Channels.HttpInput.ParseIncomingMessage(Exception& requestException)
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
--- End of inner exception stack trace ---
错误类型三
WCF调用异常-There was no endpoint listening at http://****/**.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.
System.ServiceModel.EndpointNotFoundException: There was no endpoint listening at http:/****/**.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。 218.92.73.183:80
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception)
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
at System.Net.HttpWebRequest.GetRequestStream()
at System.ServiceModel.Channels.HttpOutput.WebRequestHttpOutput.GetOutputStream()
--- End of inner exception stack trace ---
Server stack trace:
at System.ServiceModel.Channels.HttpOutput.WebRequestHttpOutput.GetOutputStream()
at System.ServiceModel.Channels.HttpOutput.Send(TimeSpan timeout)
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.SendRequest(Message message, 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)
