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WCF服務（服務器）運行良好了一段時間，但比它竟然跟例外崩潰，此異常被記錄在AppDomain.CurrentDomain.UnhandledException：WCF服務器側面碰撞CommunicationObjectFaultedException：
System.ServiceModel.CommunicationObjectFaultedException: The communication object, System.ServiceModel.Channels.SecurityChannelListener`1+SecurityReplySessionChannel[System.ServiceModel.Channels.IReplySessionChannel], cannot be used for communication because it is in the Faulted state.
at System.ServiceModel.Channels.CommunicationObject.ThrowIfFaulted()
at System.ServiceModel.Channels.SecurityChannelListener`1.ReceiveItemAndVerifySecurityAsyncResult`2.StartInnerReceive()
at System.ServiceModel.Channels.SecurityChannelListener`1.ReceiveItemAndVerifySecurityAsyncResult`2.OnFaultSent()
at System.ServiceModel.Channels.SecurityChannelListener`1.ReceiveItemAndVerifySecurityAsyncResult`2.OnInnerReceiveDone()
at System.ServiceModel.Channels.SecurityChannelListener`1.ReceiveItemAndVerifySecurityAsyncResult`2.StartInnerReceive()
at System.ServiceModel.Channels.SecurityChannelListener`1.ReceiveItemAndVerifySecurityAsyncResult`2.Start()
at System.ServiceModel.Channels.SecurityChannelListener`1.ReceiveRequestAndVerifySecurityAsyncResult.ReceiveMessage(Object state)
at System.Runtime.IOThreadScheduler.ScheduledOverlapped.IOCallback(UInt32 errorCode, 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)
有沒有xml配置，一切都在運行時配置。 服務上下文是單個，併發是多個。
我們已禁用重播檢測。我們的用戶在PC上設置了錯誤的日期時間問題，所以我們被迫「禁用」時間偏差。 Net.Tcp綁定用於通信，我們使用回調。
使用自定義錯誤處理程序，HandleError始終返回false。
當前解決方案：服務設置爲在崩潰後自動重新啓動，但這比不令人滿意。
配置（常變量的值替換）：
Uri tcpBaseAddress = new Uri(String.Format("net.tcp://localhost:{0}", MyMwcNetworkingConstants.NETWORKING_PORT_MASTER_SERVER_NEW));
// create the net.tcp binding for the service endpoint
NetTcpBinding ntcBinding = new NetTcpBinding();
ntcBinding.Security.Mode = SecurityMode.None;
ntcBinding.MaxBufferPoolSize = 1024*1024;
ntcBinding.MaxBufferSize = 10*1024;
ntcBinding.MaxConnections = 500;
ntcBinding.ListenBacklog = 500;
ntcBinding.MaxReceivedMessageSize = 10*1024;
ntcBinding.ReaderQuotas.MaxArrayLength = 10*1024;
ntcBinding.ReaderQuotas.MaxBytesPerRead = 10*1024;
ntcBinding.SendTimeout = 90s;
ntcBinding.ReceiveTimeout = 90s;
ntcBinding.Security.Mode = SecurityMode.Message;
ntcBinding.Security.Message.ClientCredentialType = MessageCredentialType.UserName;
ntcBinding.Security.Transport.ClientCredentialType = TcpClientCredentialType.None;
ntcBinding.Security.Transport.ProtectionLevel = System.Net.Security.ProtectionLevel.None;
m_host = new System.ServiceModel.ServiceHost(Service, tcpBaseAddress);
m_host.Credentials.UserNameAuthentication.CustomUserNamePasswordValidator = new MyUserValidator();
m_host.Credentials.UserNameAuthentication.UserNamePasswordValidationMode = System.ServiceModel.Security.UserNamePasswordValidationMode.Custom;
m_host.Credentials.ServiceCertificate.Certificate = new System.Security.Cryptography.X509Certificates.X509Certificate2(MyMasterConstants.MASTER_CERTIFICATE, string.Empty);
m_host.Credentials.ClientCertificate.Authentication.CustomCertificateValidator = new MyCertificateValidator(String.Empty);
m_host.Credentials.ClientCertificate.Authentication.CertificateValidationMode = System.ServiceModel.Security.X509CertificateValidationMode.None;
var endpoint = m_host.AddServiceEndpoint(typeof(IMyMasterService), MyCustomBinding.DecorateBinding(ntcBinding, MyMasterConstants.WCF_MAX_CLIENT_COUNT), tcpBaseAddress);
m_host.Open();
有我的自定義綁定：
public static class MyCustomBinding
{
public static Binding DecorateBinding(Binding binding, int? maxNegotiationCount)
{
CustomBinding customBinding = new CustomBinding(binding);
SymmetricSecurityBindingElement security = customBinding.Elements.Find<SymmetricSecurityBindingElement>();
if (security != null)
{
security.IncludeTimestamp = false;
security.LocalClientSettings.DetectReplays = false;
security.LocalServiceSettings.DetectReplays = false;
security.LocalClientSettings.MaxClockSkew = TimeSpan.MaxValue;
security.LocalServiceSettings.MaxClockSkew = TimeSpan.MaxValue;
security.LocalClientSettings.SessionKeyRenewalInterval = TimeSpan.MaxValue;
security.LocalServiceSettings.SessionKeyRenewalInterval = TimeSpan.FromMilliseconds(Int32.MaxValue);
if (maxNegotiationCount.HasValue)
{
security.LocalServiceSettings.MaxPendingSessions = maxNegotiationCount.Value;
security.LocalServiceSettings.MaxStatefulNegotiations = maxNegotiationCount.Value;
}
// Get the System.ServiceModel.Security.Tokens.SecureConversationSecurityTokenParameters
SecureConversationSecurityTokenParameters secureTokenParams = (SecureConversationSecurityTokenParameters)security.ProtectionTokenParameters;
// From the collection, get the bootstrap element.
SecurityBindingElement bootstrap = secureTokenParams.BootstrapSecurityBindingElement;
// Set the MaxClockSkew on the bootstrap element.
bootstrap.IncludeTimestamp = false;
bootstrap.LocalClientSettings.DetectReplays = false;
bootstrap.LocalServiceSettings.DetectReplays = false;
bootstrap.LocalClientSettings.MaxClockSkew = TimeSpan.MaxValue;
bootstrap.LocalServiceSettings.MaxClockSkew = TimeSpan.MaxValue;
bootstrap.LocalClientSettings.SessionKeyRenewalInterval = TimeSpan.MaxValue;
bootstrap.LocalServiceSettings.SessionKeyRenewalInterval = TimeSpan.FromMilliseconds(Int32.MaxValue);
if (maxNegotiationCount.HasValue)
{
bootstrap.LocalServiceSettings.MaxPendingSessions = maxNegotiationCount.Value;
bootstrap.LocalServiceSettings.MaxStatefulNegotiations = maxNegotiationCount.Value;
}
return customBinding;
}
else
{
return binding;
}
}
public static Binding DecorateBinding(Binding binding)
{
return DecorateBinding(binding, null);
}
}
故障狀態可能意味着很多事情（不可能解析配置等）。 將綁定更改爲basicHttpBinding - 更易於調試。 –
配置WCF跟蹤以獲取更詳細的錯誤消息。就像彼得說的那樣，斷定狀態可能意味着很多事情。 –
@ PeterLarsen'CPH'：我無法在DEV上重現此問題，它只能在PRODUCTION上重現。而且我無法改變對生產的約束。我會嘗試在DEV上重現，但需要很多種不同的請求，而且需要很長時間才能重現。它每天生產一次就會崩潰。 –