此代码略有修改，几乎可以直接从互联网上的示例中获取使用发布/订阅机制运行的net.tcp双工服务。这种方法很有效，但客户端会随机对用于通信的通道进行故障排除。一些客户在发生故障前24-48小时仍然有利于沟通。问题：有谁知道套接字随机被中止的原因，甚至是如何找出错误日志中究竟导致异常的原因？
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
namespace WcfService1
{
[ServiceContract(CallbackContract = typeof(IClientCallBack))]
interface IService
{
//The Alert Server Function called by the Client
[OperationContract(IsOneWay = true)]
void SubscribeToBeNotifiedServer(string EmpID);
[OperationContract(IsOneWay = true)]
void UpdatePricingServer(string ReservationID, string CustomerID);
[OperationContract(IsOneWay = true)]
void SendMessageToNotifyOther(string From, string To, string Message);
}
[ServiceContract]
public interface IClientCallBack
{
[OperationContract()]
[FaultContract(typeof(InvalidOperationException))]
void UpdatePricingClient(string FromReservationID, string CustomerID );
//The Alert Server Function called by the Client
[OperationContract(IsOneWay = true)]
void SubscribeToBeNotifiedClient();
[OperationContract()]
[FaultContract(typeof(InvalidOperationException))]
void ReceiveMessage(string From, string Message);
}
[ServiceBehavior( ConcurrencyMode = ConcurrencyMode.Reentrant,UseSynchronizationContext = false, InstanceContextMode = InstanceContextMode.Single, IncludeExceptionDetailInFaults=true )]
[CallbackBehavior(UseSynchronizationContext = false)]
class Service1 : IService
{
public Service1()
{
}
public void SubscribeToBeNotifiedServer(string EmpID)
{
var added = OperationContext.Current.GetCallbackChannel<IClientCallBack>();
var st = OperationContext.Current.InstanceContext.State;
var asdf1 = OperationContext.Current.Host.State;
if (!subscribers.Select(x => x.CallBackInformation).Contains(added))
{
subscribers.Add(new ClientInfo(added, OperationContext.Current, EmpID));
OperationContext.Current.Channel.Faulted += new EventHandler(Channel_Faulted);
}
}
private static readonly List<ClientInfo> subscribers = new List<ClientInfo>();
public void UpdatePricingServer(string ReservationID, string CustomerID)
{
try
{
List<ClientInfo> Remove = new List<ClientInfo>();
Action<ClientInfo> invoke = delegate(ClientInfo callback)
{
//I wrapped this in its own thread as the entire thread gets torn down if there is an exception
// when you call the client. This is true even if its in a try catch the entire thread dies.
System.Threading.Thread mythread = new System.Threading.Thread((System.Threading.ThreadStart)delegate() {
try
{
var test = (ICommunicationObject)callback.CallBackInformation;
if (test.State == CommunicationState.Opened && callback.InstanceContext.Host.State == CommunicationState.Opened)
{
callback.CallBackInformation.UpdatePricingClient(ReservationID, CustomerID);
}
else
{
Remove.Add(callback);
}
}
catch (FaultException<InvalidOperationException> exception)
{ }
catch (FaultException exception)
{ }
catch (CommunicationException exception)
{ }
});
mythread.Start();
};
subscribers.ForEach(invoke);
foreach (var temp1 in Remove)
{
subscribers.Remove(temp1);
}
}
catch (Exception ex)
{
}
}
public void SendMessageToNotifyOther(string From, string To, string Message)
{
try
{
List<ClientInfo> Remove = new List<ClientInfo>();
Action<ClientInfo> invoke = delegate(ClientInfo callback)
{
//I wrapped this in its own thread as the entire thread gets torn down if there is an exception
// when you call the client. This is true even if its in a try catch the entire thread dies.
System.Threading.Thread mythread = new System.Threading.Thread((System.Threading.ThreadStart)delegate()
{
try
{
var test = (ICommunicationObject)callback.CallBackInformation;
if (test.State == CommunicationState.Opened && callback.InstanceContext.Host.State == CommunicationState.Opened)
{
if (callback.EmployeeID == To)
{
callback.CallBackInformation.ReceiveMessage(From, Message);
}
}
else
{
Remove.Add(callback);
}
}
catch (FaultException<InvalidOperationException> exception)
{ }
catch (FaultException exception)
{ }
catch (CommunicationException exception)
{ }
});
mythread.Start();
};
subscribers.ForEach(invoke);
foreach (var temp1 in Remove)
{
subscribers.Remove(temp1);
}
}
catch (Exception ex)
{
}
}
#region IService Members
void Channel_Faulted(object sender, EventArgs e)
{
ICommunicationObject myobj = (ICommunicationObject)sender;
myobj.Abort();
myobj.Close();
}
void InstanceContext_Closing(object sender, EventArgs e)
{
try
{
subscribers.Remove(subscribers.Where(x => x.CallBackInformation == sender).FirstOrDefault());
}
catch { }
}
void Channel_Closed(object sender, EventArgs e)
{
try
{
subscribers.Remove(subscribers.Where(x => x.CallBackInformation == sender).FirstOrDefault());
}
catch { }
}
void InstanceContext_Closed(object sender, EventArgs e)
{
try
{
subscribers.Remove(subscribers.Where(x => x.CallBackInformation == sender).FirstOrDefault());
}
catch { }
}
void InstanceContext_Faulted(object sender, EventArgs e)
{
try
{
subscribers.Remove(subscribers.Where(x => x.CallBackInformation == sender).FirstOrDefault());
}
catch { }
}
#endregion
}
public class ClientInfo
{
IClientCallBack client;
OperationContext context;
public ClientInfo(IClientCallBack clientcall, OperationContext Instance, string EmpID)
{
this.client = clientcall;
this.context = Instance;
this.EmployeeID = EmpID;
}
public IClientCallBack CallBackInformation
{
get { return client; }
set { this.client = value; }
}
public OperationContext InstanceContext
{
get { return context; }
set { this.context = value; }
}
public string EmployeeID;
}
}
这是服务器的web.config
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
<customErrors mode="Off">
</customErrors>
</system.web>
<system.serviceModel>
<!--WcfService1.IService-->
<services>
<service behaviorConfiguration="MyBehavior" name="WcfService1.Service1">
<endpoint address="" binding="netTcpBinding"
bindingConfiguration="portSharingBinding" name="MyServiceEndpoint"
contract="WcfService1.IService">
<identity>
<!--<dns value="localhost:808" />-->
</identity>
</endpoint>
<endpoint address="/mex" kind="mexEndpoint"
binding="mexTcpBinding"
contract="IMetadataExchange" />
<host>
<baseAddresses>
<!--<add baseAddress="net.tcp://iiswatso/MnetTcp/Service1.svc" />-->
<add baseAddress="net.tcp://localhost/WcfService/Service1.svc" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="MyBehavior" >
<serviceTimeouts />
<serviceMetadata httpGetEnabled="false" />
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
<bindings>
<netTcpBinding>
<binding name="portSharingBinding" portSharingEnabled="true" openTimeout="infinite" closeTimeout="infinite" receiveTimeout="infinite" sendTimeout="infinite" >
<reliableSession inactivityTimeout="infinite" ordered="True" enabled="true" />
<security mode="None"></security>
</binding>
</netTcpBinding>
</bindings>
</system.serviceModel>
<system.webServer>
</system.webServer>
<system.diagnostics>
<trace autoflush="true"></trace>
<sources>
<source name="System.ServiceModel" switchValue="Information, ActivityTracing" propagateActivity="true">
<listeners>
<add name="traceListener" type="System.Diagnostics.XmlWriterTraceListener" initializeData="c:\log\Server3.svclog" />
</listeners>
</source>
</sources>
</system.diagnostics>
</configuration>
以下是服务器的跟踪日志：
<E2ETraceEvent xmlns="http://schemas.microsoft.com/2004/06/E2ETraceEvent">
<System xmlns="http://schemas.microsoft.com/2004/06/windows/eventlog/system">
<EventID>131075</EventID>
<Type>3</Type>
<SubType Name="Error">0</SubType>
<Level>2</Level>
<TimeCreated SystemTime="2012-05-30T18:11:10.9002453Z" />
<Source Name="System.ServiceModel" />
<Correlation ActivityID="{00000000-0000-0000-0000-000000000000}" />
<Execution ProcessName="Meridian Reservation System.vshost" ProcessID="10676" ThreadID="21" />
<Channel />
<Computer>JIMMY-PC</Computer>
</System>
<ApplicationData>
<TraceData>
<DataItem>
<TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Error">
<TraceIdentifier>http://msdn.microsoft.com/en-US/library/System.ServiceModel.Diagnostics.ThrowingException.aspx</TraceIdentifier>
<Description>Throwing an exception.</Description>
<AppDomain>Meridian Reservation System.vshost.exe</AppDomain>
<Exception>
<ExceptionType>System.ServiceModel.CommunicationException, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
<Message>The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '10675199.02:48:05.4775807'.</Message>
<StackTrace>
at System.ServiceModel.Channels.SocketConnection.BeginReadCore(Int32 offset, Int32 size, TimeSpan timeout, WaitCallback callback, Object state)
at System.ServiceModel.Channels.SocketConnection.BeginRead(Int32 offset, Int32 size, TimeSpan timeout, WaitCallback callback, Object state)
at System.ServiceModel.Channels.DelegatingConnection.BeginRead(Int32 offset, Int32 size, TimeSpan timeout, WaitCallback callback, Object state)
at System.ServiceModel.Channels.SessionConnectionReader.BeginReceive(TimeSpan timeout, WaitCallback callback, Object state)
at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult.PerformOperation(TimeSpan timeout)
at System.ServiceModel.Channels.SynchronizedMessageSource.SynchronizedAsyncResult`1..ctor(SynchronizedMessageSource syncSource, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult..ctor(SynchronizedMessageSource syncSource, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.SynchronizedMessageSource.BeginReceive(TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.FramingDuplexSessionChannel.BeginReceive(TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.FramingDuplexSessionChannel.TryReceiveAsyncResult..ctor(FramingDuplexSessionChannel channel, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.FramingDuplexSessionChannel.BeginTryReceive(TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ClientReliableChannelBinder`1.DuplexClientReliableChannelBinder`1.OnBeginTryReceive(TDuplexChannel channel, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableChannelBinder`1.TryReceiveAsyncResult.BeginInput(ReliableChannelBinder`1 binder, TChannel channel, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableChannelBinder`1.InputAsyncResult`1.CompleteTryGetChannel(IAsyncResult result, Boolean& complete)
at System.ServiceModel.Channels.ReliableChannelBinder`1.InputAsyncResult`1.Start()
at System.ServiceModel.Channels.ReliableChannelBinder`1.TryReceiveAsyncResult..ctor(ReliableChannelBinder`1 binder, TimeSpan timeout, MaskingMode maskingMode, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableChannelBinder`1.BeginTryReceive(TimeSpan timeout, MaskingMode maskingMode, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableChannelBinder`1.BeginTryReceive(TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableDuplexSessionChannel.StartReceiving(Boolean canBlock)
at System.ServiceModel.Channels.ReliableDuplexSessionChannel.HandleReceiveComplete(IAsyncResult result)
at System.ServiceModel.Channels.ReliableDuplexSessionChannel.OnReceiveCompletedStatic(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
at System.ServiceModel.Channels.ReliableChannelBinder`1.InputAsyncResult`1.OnInputComplete(IAsyncResult result)
at System.ServiceModel.Channels.ReliableChannelBinder`1.InputAsyncResult`1.OnInputCompleteStatic(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
at System.ServiceModel.Channels.FramingDuplexSessionChannel.TryReceiveAsyncResult.OnReceive(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
at System.ServiceModel.Channels.SynchronizedMessageSource.SynchronizedAsyncResult`1.CompleteWithUnlock(Boolean synchronous, Exception exception)
at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult.OnReceiveComplete(Object state)
at System.ServiceModel.Channels.SessionConnectionReader.OnAsyncReadComplete(Object state)
at System.ServiceModel.Channels.SocketConnection.FinishRead()
at System.ServiceModel.Channels.SocketConnection.AsyncReadCallback(Boolean haveResult, Int32 error, Int32 bytesRead)
at System.ServiceModel.Channels.OverlappedContext.CompleteCallback(UInt32 error, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
at System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)
</StackTrace>
<ExceptionString>System.ServiceModel.CommunicationException: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '10675199.02:48:05.4775807'. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
--- End of inner exception stack trace ---</ExceptionString>
<InnerException>
<ExceptionType>System.Net.Sockets.SocketException, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
<Message>An existing connection was forcibly closed by the remote host</Message>
<StackTrace>
at System.ServiceModel.Channels.SocketConnection.BeginReadCore(Int32 offset, Int32 size, TimeSpan timeout, WaitCallback callback, Object state)
at System.ServiceModel.Channels.SocketConnection.BeginRead(Int32 offset, Int32 size, TimeSpan timeout, WaitCallback callback, Object state)
at System.ServiceModel.Channels.DelegatingConnection.BeginRead(Int32 offset, Int32 size, TimeSpan timeout, WaitCallback callback, Object state)
at System.ServiceModel.Channels.SessionConnectionReader.BeginReceive(TimeSpan timeout, WaitCallback callback, Object state)
at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult.PerformOperation(TimeSpan timeout)
at System.ServiceModel.Channels.SynchronizedMessageSource.SynchronizedAsyncResult`1..ctor(SynchronizedMessageSource syncSource, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult..ctor(SynchronizedMessageSource syncSource, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.SynchronizedMessageSource.BeginReceive(TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.FramingDuplexSessionChannel.BeginReceive(TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.FramingDuplexSessionChannel.TryReceiveAsyncResult..ctor(FramingDuplexSessionChannel channel, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.FramingDuplexSessionChannel.BeginTryReceive(TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ClientReliableChannelBinder`1.DuplexClientReliableChannelBinder`1.OnBeginTryReceive(TDuplexChannel channel, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableChannelBinder`1.TryReceiveAsyncResult.BeginInput(ReliableChannelBinder`1 binder, TChannel channel, TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableChannelBinder`1.InputAsyncResult`1.CompleteTryGetChannel(IAsyncResult result, Boolean& complete)
at System.ServiceModel.Channels.ReliableChannelBinder`1.InputAsyncResult`1.Start()
at System.ServiceModel.Channels.ReliableChannelBinder`1.TryReceiveAsyncResult..ctor(ReliableChannelBinder`1 binder, TimeSpan timeout, MaskingMode maskingMode, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableChannelBinder`1.BeginTryReceive(TimeSpan timeout, MaskingMode maskingMode, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableChannelBinder`1.BeginTryReceive(TimeSpan timeout, AsyncCallback callback, Object state)
at System.ServiceModel.Channels.ReliableDuplexSessionChannel.StartReceiving(Boolean canBlock)
at System.ServiceModel.Channels.ReliableDuplexSessionChannel.HandleReceiveComplete(IAsyncResult result)
at System.ServiceModel.Channels.ReliableDuplexSessionChannel.OnReceiveCompletedStatic(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
at System.ServiceModel.Channels.ReliableChannelBinder`1.InputAsyncResult`1.OnInputComplete(IAsyncResult result)
at System.ServiceModel.Channels.ReliableChannelBinder`1.InputAsyncResult`1.OnInputCompleteStatic(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
at System.ServiceModel.Channels.FramingDuplexSessionChannel.TryReceiveAsyncResult.OnReceive(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
at System.ServiceModel.Channels.SynchronizedMessageSource.SynchronizedAsyncResult`1.CompleteWithUnlock(Boolean synchronous, Exception exception)
at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult.OnReceiveComplete(Object state)
at System.ServiceModel.Channels.SessionConnectionReader.OnAsyncReadComplete(Object state)
at System.ServiceModel.Channels.SocketConnection.FinishRead()
at System.ServiceModel.Channels.SocketConnection.AsyncReadCallback(Boolean haveResult, Int32 error, Int32 bytesRead)
at System.ServiceModel.Channels.OverlappedContext.CompleteCallback(UInt32 error, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
at System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)
</StackTrace>
<ExceptionString>System.Net.Sockets.SocketException (0x80004005): An existing connection was forcibly closed by the remote host</ExceptionString>
<NativeErrorCode>2746</NativeErrorCode>
</InnerException>
</Exception>
</TraceRecord>
</DataItem>
</TraceData>
</ApplicationData>
</E2ETraceEvent>
跟踪客户：
<E2ETraceEvent xmlns="http://schemas.microsoft.com/2004/06/E2ETraceEvent">
<System xmlns="http://schemas.microsoft.com/2004/06/windows/eventlog/system">
<EventID>131075</EventID>
<Type>3</Type>
<SubType Name="Error">0</SubType>
<Level>2</Level>
<TimeCreated SystemTime="2012-05-30T18:11:02.2488000Z" />
<Source Name="System.ServiceModel" />
<Correlation ActivityID="{54830e63-b315-4f74-9455-d9ba50c655c0}" />
<Execution ProcessName="w3wp" ProcessID="2716" ThreadID="6" />
<Channel />
<Computer>IISWATSO</Computer>
</System>
<ApplicationData>
<TraceData>
<DataItem>
<TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Error">
<TraceIdentifier>http://msdn.microsoft.com/en-US/library/System.ServiceModel.Diagnostics.ThrowingException.aspx</TraceIdentifier>
<Description>Throwing an exception.</Description>
<AppDomain>/LM/W3SVC/3/ROOT/MNetTcp-1-129828750305652000</AppDomain>
<Exception>
<ExceptionType>System.ServiceModel.CommunicationException, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
<Message>The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '10675199.02:48:05.4775807'.</Message>
<StackTrace>
at System.ServiceModel.Channels.SocketConnection.EndRead()
at System.ServiceModel.Channels.TracingConnection.EndRead()
at System.ServiceModel.Channels.SessionConnectionReader.OnAsyncReadComplete(Object state)
at System.ServiceModel.Channels.TracingConnection.TracingConnectionState.ExecuteCallback()
at System.ServiceModel.Channels.SocketConnection.AsyncReadCallback(Boolean haveResult, Int32 error, Int32 bytesRead)
at System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)
</StackTrace>
<ExceptionString>System.ServiceModel.CommunicationException: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '10675199.02:48:05.4775807'. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
--- End of inner exception stack trace ---</ExceptionString>
<InnerException>
<ExceptionType>System.Net.Sockets.SocketException, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
<Message>An existing connection was forcibly closed by the remote host</Message>
<StackTrace>
at System.ServiceModel.Channels.SocketConnection.EndRead()
at System.ServiceModel.Channels.TracingConnection.EndRead()
at System.ServiceModel.Channels.SessionConnectionReader.OnAsyncReadComplete(Object state)
at System.ServiceModel.Channels.TracingConnection.TracingConnectionState.ExecuteCallback()
at System.ServiceModel.Channels.SocketConnection.AsyncReadCallback(Boolean haveResult, Int32 error, Int32 bytesRead)
at System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, Nativ
答案 0 :(得分：3)
你有至少9个空捕获块，这意味着你正在吞咽错误并且无法看到发生了什么错误。
您应该做的第一件事是将记录代码放在每个catch块中以记录错误。
从您发布的代码中可以看出，您正在打开频道，没有打开频道，使用它并尽快关闭频道。最终打开的频道将进入故障状态。