WCF服务在一段时间后自行消失

时间：2011-07-05 05:46:03

标签： wcf hosting

我遇到了与托管WCF服务（.NET Framework 4，IIS 7，Windows 2008 Standard SP2）相关的特殊问题。

在我部署服务之后，它工作正常一段时间，并且通过抛出未找到文件的异常而自行消亡。例外情况如下。

该应用程序托管在IIS7中，其中一个特定的应用程序池指向.NET Framework 4版本。我已经使用FusionLog找到了更多丢失的程序集，没有运气。但是，如果我从托管服务器中删除所有程序集并从构建文件夹再次复制它，它将再次开始工作，绝对没有问题。我无法解释这种行为，并搜索/尝试了很多寻找答案。为了提供更多信息，该服务是本地程序集，我使用Enterprise Library进行异常处理和日志记录。 WCF使用httpBinding为我们服务。程序集是调试版本。请帮忙。

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <configSections>
    ------    
  <!-- Begin .......Exception Handling Configuration-->
  <!-- End .........Exception Handling configuration-->

  <!-- Start .............Logging Configuration-->
  <!--End............ Logging Configuration-->

  <system.web>
    <compilation debug="true" targetFramework="4.0" />
        <identity impersonate="true" />
  </system.web>
    <system.webServer>
        <validation validateIntegratedModeConfiguration="false" />
        <defaultDocument>
            <files>
                <add value="Service.svc" />
            </files>
        </defaultDocument>
    </system.webServer>

    <!-- Start WCF ................Settings-->
  <system.serviceModel>
    <diagnostics>
      <messageLogging logEntireMessage="true" logMessagesAtServiceLevel="true" />
      <endToEndTracing propagateActivity="true" activityTracing="true" messageFlowTracing="true" />
    </diagnostics>
    <!-- Begin..Included for Switching off Security-->
    <bindings>
      <basicHttpBinding>
        <binding name="httpBindingConfig" closeTimeout="24.01:00:00" openTimeout="24.01:00:00" receiveTimeout="24.10:00:00" sendTimeout="24.01:00:00" />
      </basicHttpBinding>
    </bindings>
    <!-- End ..Included for Switching off Security-->
    <services>
      <service name="Service">
        <endpoint binding="mexTcpBinding" bindingConfiguration="" name="EndPointMex" contract="ICommunicatorService" />
        <endpoint address="http://<>/Service.svc" binding="basicHttpBinding" bindingConfiguration="" name="EndPointHttp" contract="Reflections.IService" />
        <host>
          <timeouts closeTimeout="24.00:10:00" openTimeout="24.01:00:00" />
        </host>
      </service>
    </services>
    <behaviors>
    <serviceBehaviors>
      <behavior>
        <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
        <serviceMetadata httpGetEnabled="true" />
        <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
        <serviceDebug includeExceptionDetailInFaults="true" />
      </behavior>
    </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <!-- End WCF ................Settings-->  
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true" />
  </system.webServer>
 </configuration>

事件日志---------------------- 

 Log Name:      Application
    Source:        System.ServiceModel 4.0.0.0
    Date:          7/5/2011 10:39:47 AM
    Event ID:      3
    Task Category: WebHost
    Level:         Error
    Keywords:      Classic
    User:          NETWORK SERVICE
    Computer:      <Masked for Security Reasons>
    Description:
    WebHost failed to process a request.
     Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/12036987
     Exception: System.ServiceModel.ServiceActivationException: The service '/Service.svc' cannot be activated due to an exception during compilation.  The exception message is: Could not load file or assembly 'Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e' or one of its dependencies. The system cannot find the file specified.. ---> System.IO.FileNotFoundException: Could not load file or assembly 'Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e' or one of its dependencies. The system cannot find the file specified.
       at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
       at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
       at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks)
       at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
       at System.Reflection.Assembly.Load(String assemblyString)
       at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses)
       at System.ServiceModel.ServiceHostingEnvironment.HostingManager.CreateService(String normalizedVirtualPath)
       at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath)
       at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)
       --- End of inner exception stack trace ---
       at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)
       at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath)
     Process Name: w3wp
     Process ID: 3480

ASP.NET页面中显示的错误----------------- 

Server Error in '/' Application.
--------------------------------------------------------------------------------

Could not load file or assembly 'Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e' or one of its dependencies. The system cannot find the file specified. 
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.IO.FileNotFoundException: Could not load file or assembly 'Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e' or one of its dependencies. The system cannot find the file specified.

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.  

Assembly Load Trace: The following information can be helpful to determine why the assembly 'Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e' could not be loaded.


Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable  c:\windows\system32\inetsrv\w3wp.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: User = NT AUTHORITY\NETWORK SERVICE
LOG: DisplayName = Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e
 (Fully-specified)
LOG: Appbase = file://path/
LOG: Initial PrivatePath = \\path\bin
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: \\path\web.config
LOG: Using host configuration file: C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Post-policy reference: Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e
LOG: The same bind was seen before, and was failed with hr = 0x80070002.



Stack Trace: 


[FileNotFoundException: Could not load file or assembly 'Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e' or one of its dependencies. The system cannot find the file specified.]
   System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
   System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +39
   System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks) +132
   System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +144
   System.Reflection.Assembly.Load(String assemblyString) +28
   System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses) +210
   System.ServiceModel.HostingManager.CreateService(String normalizedVirtualPath) +1440
   System.ServiceModel.HostingManager.ActivateService(String normalizedVirtualPath) +44
   System.ServiceModel.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) +615

[ServiceActivationException: The service '/Service.svc' cannot be activated due to an exception during compilation.  The exception message is: Could not load file or assembly 'Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e' or one of its dependencies. The system cannot find the file specified..]
   System.Runtime.AsyncResult.End(IAsyncResult result) +687598
   System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result) +190
   System.ServiceModel.Activation.ServiceHttpModule.EndProcessRequest(IAsyncResult ar) +301390
   System.Web.AsyncEventExecutionStep.OnAsyncEventCompletion(IAsyncResult ar) +8898292
-------------------------------------------------------------------------------

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1

融合日志错误

*** Assembly Binder Log Entry  (7/22/2011 @ 10:34:51 AM) ***

The operation failed.
Bind result: hr = 0x80070002. The system cannot find the file specified.

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable  c:\windows\system32\inetsrv\w3wp.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: User = NT AUTHORITY\NETWORK SERVICE
LOG: DisplayName = Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e
 (Fully-specified)
LOG: Appbase = file://path/
LOG: Initial PrivatePath = \\path\bin
LOG: Dynamic Base = C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\b44c783a
LOG: Cache Base = C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\b44c783a
LOG: AppName = 34485861
Calling assembly : (Unknown).
===
LOG: Start binding of native image Reflections.Service, Version=1.0.0.0, Culture=en-US, PublicKeyToken=fb2997440781f12e.
WRN: No matching native image found.

这里有一个类似的问题，但无法找到anwer Changing the web.config takes the WCF service down?

1 个答案:

答案 0 :(得分：5)

是否有可能找不到文件是一个红鲱鱼，你刚刚遇到不活动超时？我记得当我写第一个WCF服务时，我没有意识到超时设置默认为相当短的几分钟。我认为你可以把它们设置得很长（比如24天）。

在我的app配置中＆lt; configuration＆gt;紧跟在我的＆lt; system.web＆gt;之后的部分第一节：

    <system.serviceModel>
    <bindings>
        <netTcpBinding>
            <binding name="tcp_unsecured" receiveTimeout="infinite" sendTimeout="00:00:30">
                <security mode="None">
                </security>
            </binding>
        </netTcpBinding>
    </bindings>

接下来是我的服务和行为部分。当我右键单击并在app.config上选择Edit WCF Configuration时，这是对话框的一个png。我在app.config xml文件中键入“无限”但对话框将其转换为相关的大值。 enter image description here

更新：在我的mediator类中，这里是设置NetTcpBinding的构造函数。我包括这个因为看起来我需要在代码中设置超时。

    public DspServiceMediator( String serviceAddress)
    {
        EndpointAddress end_point = new EndpointAddress(serviceAddress);
        NetTcpBinding new_tcp = new NetTcpBinding(SecurityMode.None)
                                {ReceiveTimeout = TimeSpan.MaxValue,
                                 SendTimeout = new TimeSpan(0, 0, 30)
                                };

        _dspClient = new DspServiceClient(new_tcp, end_point);
    }
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