CommunicationObjectAbortedException& WCF服务中的CommunicationObjectFaultedException [英] CommunicationObjectAbortedException & CommunicationObjectFaultedException in WCF Service
问题描述
我正在基于发布者订阅者模式的系统上工作。我有一个在WPF应用程序中运行的WCF服务。有许多客户端连接到该服务。客户端也是WPF。我在下面附加我系统的代码段：
I am working on a system based on the publisher subscriber pattern. I have a WCF service that is running in a WPF application. There are numerous clients which connect to the service. The client side is also WPF. I am attaching code snippets of my system below:
服务：
[ServiceContract(Namespace = "http://AutoFXProfitsServer", SessionMode = SessionMode.Required, CallbackContract = typeof(ITradeMirrorClientContract))]
public interface ITradeMirror
{
[OperationContract]
string Subscribe(string userName, string password, int accountID);
[OperationContract]
bool Unsubscribe(string userName, string password, int accountID);
[OperationContract]
void PublishNewSignal(string signalInformation);
}
public interface ITradeMirrorClientContract
{
[OperationContract(IsOneWay = true)]
void NewSignal(string signalInformation);
}
public class NewSignalEventArgs : EventArgs
{
public string SignalInformation;
}
.
.
.
.
[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, AutomaticSessionShutdown = false)]
public class TradeMirrorService : DependencyObject, ITradeMirror
{
.
.
.
.
public string Subscribe(string userName, string password, int accountID)
{
try
{
if (AuthenticationSuccessful)
{
_callback = OperationContext.Current.GetCallbackChannel<ITradeMirrorClientContract>();
_newSignalHandler = new NewSignalEventHandler(NewSignalHandler);
NewSignalEvent -= _newSignalHandler;
NewSignalEvent += _newSignalHandler;
string suffixes = GetSuffixes();
return suffixes;
}
else
{
return "FAILED";
}
}
catch (Exception exception)
{
return "FAILED";
}
}
public bool Unsubscribe(string userName, string password, int accountID)
{
try
{
if (SearchHelper.UnAuthenticateUserCredentials(userName, password, accountID, _helper))
{
_callback = OperationContext.Current.GetCallbackChannel<ITradeMirrorClientContract>();
_newSignalHandler = new NewSignalEventHandler(NewSignalHandler);
NewSignalEvent -= _newSignalHandler;
return true;
}
else
{
return false;
}
}
catch (Exception exception)
{
return false;
}
}
public void PublishNewSignal(string signalInformation)
{
try
{
if (HeartBeatMessage())
{
}
else
{
_systemOrderID++;
signalInformation = TransformSignalInformation(signalInformation, _systemOrderID);
}
var e = new NewSignalEventArgs {SignalInformation = signalInformation};
NewSignalEvent(this, e);
}
catch (Exception exception)
{
}
}
和我的app.config：
<?xml version="1.0"?>
<configuration>
<system.serviceModel>
<bindings>
<netTcpBinding>
<binding closeTimeout="23:59:59" openTimeout="23:59:59" receiveTimeout="23:59:59" sendTimeout="23:59:59" transactionFlow="false" transferMode="Buffered"
transactionProtocol="OleTransactions" hostNameComparisonMode="StrongWildcard" listenBacklog="1000" maxBufferPoolSize="524288" maxBufferSize="65536"
maxConnections="1000" maxReceivedMessageSize="65536">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384"/>
<reliableSession ordered="true" inactivityTimeout="23:59:59" enabled="false"/>
<security mode="None"/>
</binding>
</netTcpBinding>
</bindings>
<!--For debugging purposes set the includeExceptionDetailInFaults attribute to true-->
<behaviors>
<serviceBehaviors>
<behavior>
<serviceMetadata httpGetEnabled="false" httpGetUrl="http://95.138.188.232/autofxprofits/service"/>
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup> </configuration>
系统可以长时间完美运行，没有任何问题。发生的是由于某种原因（我不确定），该服务有时会因以下异常而崩溃：
The system works perfectly for long periods without any issues. What happens is that for some reason (about which i am not entirley sure) the service sometimes crashed with the exception:
CommunicationObjectAbortedException或CommunicationObjectFaultedException
CommunicationObjectAbortedException OR CommunicationObjectFaultedException
System.ServiceModel.CommunicationObjectAbortedException: The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it has been Aborted.
Server stack trace:
at System.ServiceModel.Channels.CommunicationObject.ThrowIfDisposedOrNotOpen()
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 AutoFXProfitsServer.ITradeMirrorClientContract.NewSignal(String signalInformation)
at AutoFXProfitsServer.TradeMirrorService.NewSignalHandler(Object sender, NewSignalEventArgs e) in D:\Work\Trade Mirror - Kumar\AutoFXToolsTradeMirror\AutoFXProfitsServer\Service.cs:line 232
at AutoFXProfitsServer.TradeMirrorService.PublishNewSignal(String signalInformation) in D:\Work\Trade Mirror - Kumar\AutoFXToolsTradeMirror\AutoFXProfitsServer\Service.cs:line 171
OR，
System.ServiceModel.CommunicationObjectFaultedException: The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.
Server stack trace:
at System.ServiceModel.Channels.CommunicationObject.ThrowIfDisposedOrNotOpen()
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 AutoFXProfitsServer.ITradeMirrorClientContract.NewSignal(String signalInformation)
at AutoFXProfitsServer.TradeMirrorService.NewSignalHandler(Object sender, NewSignalEventArgs e) in D:\Work\Trade Mirror - Kumar\AutoFXToolsTradeMirror\AutoFXProfitsServer\Service.cs:line 235
at AutoFXProfitsServer.TradeMirrorService.NewSignalEventHandler.Invoke(Object sender, NewSignalEventArgs e)
at AutoFXProfitsServer.TradeMirrorService.PublishNewSignal(String signalInformation) in D:\Work\Trade Mirror - Kumar\AutoFXToolsTradeMirror\AutoFXProfitsServer\Service.cs:line 174
重申一下，这些异常发生在PublishNewSignal方法中。我从所有测试中得出的原因之一是，这在客户端异常关闭时发生。例如，客户端进程已从任务管理器等中关闭。
Just to reiterate, these exception occur in the PublishNewSignal method. One reason that i have made out from all the testing is that this happens when a client is abnormally closed. For example, the client process is closed from the task manager etc.
但是，此问题是一个巨大的痛苦，如果不解决此稳定性问题，我们将无法前途。有谁知道为什么通信对象出现故障并且服务崩溃？
But this issue is a big pain and we can not move forawrd without fixing this stability issue. Does anyone have any idea as to why the communication object becomes faulted and the service crashes?
希望对此有一些积极的反馈。
Hoping to get some positive feedback on this.
谢谢。
Umer
Thanks. Umer
推荐答案
经过一番研究，我自己解决了这个问题。问题是，每当我的客户端意外断开连接而没有正确取消订阅时，该服务将无法正确地处理掉落的客户端。因此，通信对象成为故障。 李的对这个问题确实帮助我朝着正确的方向思考。经过进一步的研究，我发现了此讨论在解决问题中非常有用。
After some research, i have solved this issue myself. The problem was that whenever my client disconnected unexpectedly without properly unsubscribing, and the service was not properly taking care of the dropped client. So the communciation object became faulted. Lee's answer to this question really helped me think in the right direction. Upon some more research then, i found this discussion pretty useful in solving the problem.
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