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WCF 호출 오류 메시지 - System.ServiceModel.CommunicationException: Internal Server Error

어떤 WCF 호출을 담은 웹 페이지를 호출했을 때의 오류 메시지가 이렇게 나왔습니다.

Server Error in '/' Application.

Internal Server Error 
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

 Exception Details: System.ServiceModel.CommunicationException: Internal Server Error

Source Error: 

 An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 

[CommunicationException: Internal Server Error]
   System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) +357
   System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) +1359
   WcfInterfaceLib.IHelloWorld.GetDate(String year, String month, String day) +0
   WebSiteTest.CallToAsmxService.Page_Load(Object sender, EventArgs e) in d:\WebSiteTest\CallToAsmxService.aspx.cs:167
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +154
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4131

오류 메시지가 매우 불친절하군요. ^^; 원인을 전혀 종잡을 수 없습니다. 다행히, 이 시점의 이벤트 로그를 보면 좀 더 자세한 메시지를 확인할 수 있습니다.

Log Name:      Application
Source:        ASP.NET 4.0.30319.0
Date:          2018-12-20 오후 1:16:48
Event ID:      1310
Task Category: Web Event
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      win2019.testad.com
Description:
Event code: 3008 
Event message: A configuration error has occurred. 
Event time: 2018-12-20 오후 1:16:48 
Event time (UTC): 2018-12-20 오전 4:16:48 
Event ID: d707fdd8a8414d22ac0094a451611c1a 
Event sequence: 1 
Event occurrence: 1 
Event detail code: 0 
 
Application information: 
    Application domain: /LM/W3SVC/2/ROOT/WCFs-2-131897530080004550 
    Trust level: Full 
    Application Virtual Path: /WCFs 
    Application Path: D:\WebSiteTest\WCFs\ 
    Machine name: WIN2019 
 
Process information: 
    Process ID: 4404 
    Process name: w3wp.exe 
    Account name: IIS APPPOOL\WebSiteTest 
 
Exception information: 
    Exception type: ConfigurationErrorsException 
    Exception message: Could not load file or assembly 'System.ServiceModel.DomainServices.Hosting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, Boolean checkAptcaBit)
   at System.Web.Configuration.Common.ModulesEntry.SecureGetType(String typeName, String propertyName, ConfigurationElement configElement)
   at System.Web.Configuration.Common.ModulesEntry..ctor(String name, String typeName, String propertyName, ConfigurationElement configElement)
   at System.Web.HttpApplication.BuildIntegratedModuleCollection(List`1 moduleList)
   at System.Web.HttpApplication.GetModuleCollection(IntPtr appContext)
   at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
   at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
   at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
   at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)

Could not load file or assembly 'System.ServiceModel.DomainServices.Hosting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName)
   at System.RuntimeType.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark)
   at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
 
Request information: 
    Request URL: http://127.0.0.1:8010/WCFs/CHelloWorld.svc/date/2012/05/06 
    Request path: /WCFs/CHelloWorld.svc/date/2012/05/06 
    User host address: 127.0.0.1 
    User:  
    Is authenticated: False 
    Authentication Type:  
    Thread account name: IIS APPPOOL\WebSiteTest 
 
Thread information: 
    Thread ID: 15 
    Thread account name: IIS APPPOOL\WebSiteTest 
    Is impersonating: False 
    Stack trace:    at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, Boolean checkAptcaBit)
   at System.Web.Configuration.Common.ModulesEntry.SecureGetType(String typeName, String propertyName, ConfigurationElement configElement)
   at System.Web.Configuration.Common.ModulesEntry..ctor(String name, String typeName, String propertyName, ConfigurationElement configElement)
   at System.Web.HttpApplication.BuildIntegratedModuleCollection(List`1 moduleList)
   at System.Web.HttpApplication.GetModuleCollection(IntPtr appContext)
   at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
   at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
   at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
   at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)

그렇습니다. "System.ServiceModel.DomainServices.Hosting" 어셈블리를 찾을 수 없다는 것으로, 이 어셈블리는 .NET Framework의 기본 설치에 포함되어 있지 않은, 별도 RIA SDK 설치로 사용했던 라이브러리입니다.




그나저나, 이벤트 로그가 문제 해결에 도움이 되는 경우가 많습니다. 가령, 웹 페이지 호출 시 다음과 같은 오류가 발생하는 경우도 있습니다.

Server Error in '/' Application.

The requested service, 'http://127.0.0.1:8010/WCFs/WcfSample.svc/addrBasicHttpBinding' could not be activated. See the server's diagnostic trace logs for more information. 
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

 Exception Details: System.ServiceModel.ServiceActivationException: The requested service, 'http://127.0.0.1:8010/WCFs/WcfSample.svc/addrBasicHttpBinding' could not be activated. See the server's diagnostic trace logs for more information.

Source Error: 

 An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 

[ServiceActivationException: The requested service, 'http://127.0.0.1:8010/WCFs/WcfSample.svc/addrBasicHttpBinding' could not be activated. See the server's diagnostic trace logs for more information.]
   System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) +357
   System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) +1359
   WcfInterfaceLib.ITestWcf.HelloWorld(String connectionString) +0
   WebSiteTest.CallToAsmxService.Page_Load(Object sender, EventArgs e) in d:\WebSiteTest\CallToAsmxService.aspx.cs:235
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +154
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4131

동일한 시점의 이벤트 로그를 보면,

Log Name:      Application
Source:        System.ServiceModel 4.0.0.0
Date:          2018-12-20 오후 1:30:20
Event ID:      3
Task Category: WebHost
Level:         Error
Keywords:      Classic
User:          IIS APPPOOL\WebSiteTest
Computer:      win2019.testad.com
Description:
WebHost failed to process a request.
 Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/20974680
 Exception: System.ServiceModel.ServiceActivationException: The service '/WCFs/WcfSample.svc' cannot be activated due to an exception during compilation.  The exception message is: Could not find a base address that matches scheme net.tcp for the endpoint with binding NetTcpBinding. Registered base address schemes are [http].. ---> System.InvalidOperationException: Could not find a base address that matches scheme net.tcp for the endpoint with binding NetTcpBinding. Registered base address schemes are [http].
   at System.ServiceModel.ServiceHostBase.MakeAbsoluteUri(Uri relativeOrAbsoluteUri, Binding binding, UriSchemeKeyedCollection baseAddresses)
   at System.ServiceModel.Description.ConfigLoader.LoadServiceDescription(ServiceHostBase host, ServiceDescription description, ServiceElement serviceElement, Action`1 addBaseAddress, Boolean skipHost)
   at System.ServiceModel.ServiceHostBase.LoadConfigurationSectionInternal(ConfigLoader configLoader, ServiceDescription description, ServiceElement serviceSection)
   at System.ServiceModel.ServiceHostBase.ApplyConfiguration()
   at System.ServiceModel.ServiceHostBase.InitializeDescription(UriSchemeKeyedCollection baseAddresses)
   at System.ServiceModel.ServiceHost..ctor(Type serviceType, Uri[] baseAddresses)
   at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(Type serviceType, Uri[] baseAddresses)
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.CreateService(String normalizedVirtualPath, EventTraceActivity eventTraceActivity)
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(ServiceActivationInfo serviceActivationInfo, EventTraceActivity eventTraceActivity)
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath, EventTraceActivity eventTraceActivity)
   --- End of inner exception stack trace ---
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath, EventTraceActivity eventTraceActivity)
   at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath, EventTraceActivity eventTraceActivity)
 Process Name: w3wp
 Process ID: 5724

현재 WCF를 위해 등록한 scheme은 http 뿐이어서 net.tcp 바인딩을 할 수 없다고 나옵니다. 실제로 해당 경로의 svc를 직접 방문하는 경우 다음과 같은 오류가 발생합니다.

Server Error in '/' Application.

Could not find a base address that matches scheme net.tcp for the endpoint with binding NetTcpBinding. Registered base address schemes are [http]. 
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

 Exception Details: System.InvalidOperationException: Could not find a base address that matches scheme net.tcp for the endpoint with binding NetTcpBinding. Registered base address schemes are [http].

Source Error: 

 An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 

[InvalidOperationException: Could not find a base address that matches scheme net.tcp for the endpoint with binding NetTcpBinding. Registered base address schemes are [http].]
   System.ServiceModel.ServiceHostBase.MakeAbsoluteUri(Uri relativeOrAbsoluteUri, Binding binding, UriSchemeKeyedCollection baseAddresses) +466
   System.ServiceModel.Description.ConfigLoader.LoadServiceDescription(ServiceHostBase host, ServiceDescription description, ServiceElement serviceElement, Action`1 addBaseAddress, Boolean skipHost) +875
   System.ServiceModel.ServiceHostBase.LoadConfigurationSectionInternal(ConfigLoader configLoader, ServiceDescription description, ServiceElement serviceSection) +101
   System.ServiceModel.ServiceHostBase.ApplyConfiguration() +216
   System.ServiceModel.ServiceHostBase.InitializeDescription(UriSchemeKeyedCollection baseAddresses) +212
   System.ServiceModel.ServiceHost..ctor(Type serviceType, Uri[] baseAddresses) +265
   System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(Type serviceType, Uri[] baseAddresses) +45
   System.ServiceModel.HostingManager.CreateService(String normalizedVirtualPath, EventTraceActivity eventTraceActivity) +2086
   System.ServiceModel.HostingManager.ActivateService(ServiceActivationInfo serviceActivationInfo, EventTraceActivity eventTraceActivity) +65
   System.ServiceModel.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath, EventTraceActivity eventTraceActivity) +738

[ServiceActivationException: The service '/WCFs/WcfSample.svc' cannot be activated due to an exception during compilation.  The exception message is: Could not find a base address that matches scheme net.tcp for the endpoint with binding NetTcpBinding. Registered base address schemes are [http]..]
   System.Runtime.AsyncResult.End(IAsyncResult result) +576
   System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result) +240
   System.Web.CallHandlerExecutionStep.InvokeEndHandler(IAsyncResult ar) +234
   System.Web.CallHandlerExecutionStep.OnAsyncHandlerCompletion(IAsyncResult ar) +169

이 오류의 해결 방법은 예전의 글을 참고해,

WCF .svc 호출 시 Could not find a base address that matches scheme net.tcp 예외
; https://www.sysnet.pe.kr/2/0/11062

2가지 바인딩 설정을 IIS의 웹 사이트에 적용하면 됩니다.




[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]





[최초 등록일: ]
[최종 수정일: 12/28/2018 ]

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이 저작물은 크리에이티브 커먼즈 코리아 저작자표시-비영리-변경금지 2.0 대한민국 라이센스에 따라 이용하실 수 있습니다.
by SeongTae Jeong, mailto:techsharer@outlook.com

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