我面临一个与托管 WCF 服务（.NET Framework 4、IIS 7、Windows 2008 Standard SP2）相关的特殊问题。
在我部署该服务后，它可以正常工作一段时间，然后通过抛出文件未找到异常而自行终止。下面给出了例外的详细信息。
该应用程序托管在 IIS7 中，具有指向 .NET Framework 4 版本的特定应用程序池。我已经使用 FusionLog 来查找有关丢失的程序集的更多信息，但没有运气。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中再次复制它，它就会再次开始工作，绝对没有问题。我无法解释这种行为，并进行了很多搜索/尝试来找到答案。为了提供更多信息，该服务是本地程序集，我使用企业库进行异常处理和日志记录。我们使用 httpBinding 的 WCF 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.
这里讨论了类似的问题，但找不到答案更改 web.config 会导致 WCF 服务关闭吗？ https://stackoverflow.com/questions/6386320/changing-the-web-config-takes-the-wcf-service-down
是否有可能文件未找到是转移注意力并且您刚刚遇到不活动超时？我记得当我编写第一个 WCF 服务时，我没有意识到超时设置默认为相当短的时间（例如几分钟）。我认为你可以将它们设置得很长（比如 24 天）。
在我的应用程序配置中，紧接在
<system.serviceModel>
<bindings>
<netTcpBinding>
<binding name="tcp_unsecured" receiveTimeout="infinite" sendTimeout="00:00:30">
<security mode="None">
</security>
</binding>
</netTcpBinding>
</bindings>
This is followed by my service and behaviors sections. Here's a png of the dialog when I right click and select Edit WCF Configuration on my app.config. I typed "infinite in the app.config xml file but the dialog turns that into the relevant large value.
更新：在我的中介类中，这里是设置 NetTcpBinding 的构造函数。我之所以将其包括在内，是因为我似乎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);
}