“DefaultAppPool”与万维网发布服务发生了致命的通信错误

Question

每次访问网站时，我都会收到事件日志条目：

Event Type: Error
Event Source:   VsJITDebugger
Event Category: None
Event ID:   4096
User:       NT AUTHORITY\NETWORK SERVICE
Computer:   COMPUTER-02
Description:
An unhandled Microsoft .NET Framework exception occurred in w3wp.exe [2908]. Just-In-Time debugging this exception failed with the following error: Debugger could not be started because no user is logged on.

Check the documentation index for 'Just-in-time debugging, errors' for more information.

Data:
0000: 02 00 5c 80               ..\    

---

系统日志

Event Type: Error
Event Source:   W3SVC
Event Category: None
Event ID:   1002
Date:       28/03/2011
Time:       17:49:28
User:       N/A
Computer:   COMPUTER-02
Description:
Application pool 'DefaultAppPool' is being automatically disabled due to a series of failures in the process(es) serving that application pool.

申请日志

Event Type: Warning
Event Source:   W3SVC
Event Category: None
Event ID:   1011
Date:       28/03/2011
Time:       17:49:28
User:       N/A
Computer:   COMPUTER-02
Description:
A process serving application pool 'DefaultAppPool' suffered a fatal communication error with the World Wide Web Publishing Service. The process id was '3724'. The data field contains the error number. 

Data:
0000: 6d 00 07 80               m..    

我也没有运气地遵循Microsoft's Support site的建议。网络服务帐户访问注册表时没有任何问题。

我需要在IIS6（而不是IIS Express 7.5）中运行该站点，因为该站点运行ASP以及ASP.NET我需要通配符映射在ASP中进行身份验证。

我完全没有想法，因为ASP.NET 3.5（CLR v2 ...）中的网站很好，但是这次升级已经完全搞砸了。

非常感谢任何帮助。

Answer 1

您将需要WinDbg（适用于Windows的调试工具）和DebugDiag。

1. 安装DebugDiag和WinDbg
2. 确保已将相关框架的SOS.dll复制到WinDbg目录。
3. 添加规则以捕获IIS / COM +进程
4. 在第一个例外情况下，创建完整的用户转储。限制10
5. 打开网站看看DebugDiag，你会发现它开始进行全面转储。
6. 一旦你有几个内存转储，加载WinDbg并单击File-＆gt;打开Crash Dump并加载其中一个内存转储。
7. 输入.load sos
8. 输入!clrstack
9. 您将获得错误的堆栈跟踪，如：

0:016> .load sos
0:016> !clrstack
PDB symbol for clr.dll not loaded
OS Thread Id: 0xa60 (16)
Child SP IP       Call Site
01d2eb5c 7c81a251 [HelperMethodFrame: 01d2eb5c] System.Diagnostics.Debugger.LaunchInternal()
01d2ebac 7a0e0166 System.Diagnostics.Debugger.Launch()*** WARNING: Unable to verify checksum for mscorlib.ni.dll
*** ERROR: Module load completed but symbols could not be loaded for mscorlib.ni.dll

01d2ebd8 04470176 ebiz.Global.Application_Start(System.Object, System.EventArgs)
01d2f1f8 791421bb [DebuggerU2MCatchHandlerFrame: 01d2f1f8] 
01d2f1c4 791421bb [CustomGCFrame: 01d2f1c4] 
01d2f198 791421bb [GCFrame: 01d2f198] 
01d2f17c 791421bb [GCFrame: 01d2f17c] 
01d2f3a0 791421bb [HelperMethodFrame_PROTECTOBJ: 01d2f3a0] System.RuntimeMethodHandle._InvokeMethodFast(System.IRuntimeMethodInfo, System.Object, System.Object[], System.SignatureStruct ByRef, System.Reflection.MethodAttributes, System.RuntimeType)
01d2f41c 79b3d689 System.RuntimeMethodHandle.InvokeMethodFast(System.IRuntimeMethodInfo, System.Object, System.Object[], System.Signature, System.Reflection.MethodAttributes, System.RuntimeType)
01d2f470 79b3d37c System.Reflection.RuntimeMethodInfo.Invoke(System.Object, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo, Boolean)
01d2f4ac 79b3bfed System.Reflection.RuntimeMethodInfo.Invoke(System.Object, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo)
01d2f4d0 79b43284 System.Reflection.MethodBase.Invoke(System.Object, System.Object[])
01d2f4dc 67894f4d System.Web.HttpApplication.InvokeMethodWithAssert(System.Reflection.MethodInfo, Int32, System.Object, System.EventArgs)*** WARNING: Unable to verify checksum for System.Web.ni.dll
*** ERROR: Module load completed but symbols could not be loaded for System.Web.ni.dll

01d2f500 678951cb System.Web.HttpApplication.ProcessSpecialRequest(System.Web.HttpContext, System.Reflection.MethodInfo, Int32, System.Object, System.EventArgs, System.Web.SessionState.HttpSessionState)
01d2f550 67b34175 System.Web.HttpApplicationFactory.FireApplicationOnStart(System.Web.HttpContext)
01d2f564 672bfe1c System.Web.HttpApplicationFactory.EnsureAppStartCalled(System.Web.HttpContext)
01d2f59c 672bfd3d System.Web.HttpApplicationFactory.GetApplicationInstance(System.Web.HttpContext)
01d2f5ac 672fbf28 System.Web.HttpRuntime.ProcessRequestInternal(System.Web.HttpWorkerRequest)
01d2f5e0 672fbccd System.Web.HttpRuntime.ProcessRequestNoDemand(System.Web.HttpWorkerRequest)
01d2f5f0 672fb2cd System.Web.Hosting.ISAPIRuntime.ProcessRequest(IntPtr, Int32)
01d2f5f4 6791c30c [InlinedCallFrame: 01d2f5f4] 
01d2f668 6791c30c DomainNeutralILStubClass.IL_STUB_COMtoCLR(Int32, Int32, IntPtr)
01d2f7fc 791425a1 [GCFrame: 01d2f7fc] 
01d2f86c 791425a1 [ContextTransitionFrame: 01d2f86c] 
01d2f8a0 791425a1 [GCFrame: 01d2f8a0] 
01d2f9f8 791425a1 [ComMethodFrame: 01d2f9f8] 

无论如何，对我来说，你可以看到Debugger.Launch()正好在顶部，而且很低，看到我的代码已经进入了。似乎IIS根本不喜欢它，如果它是你的第一个代码行！

Answer 2

如果您不熟悉WinDbg，您仍然可以从转储中提取大量信息。您已经拥有DebugDiag创建的转储。启动VS，文件 - ＆gt;打开 - ＆gt;文件（Ctrl + O），选择.dmp文件。 VS2010将显示几个选项以进行调试 - 混合模式或仅限本机。选择混合模式，打开线程窗口，识别引发异常的线程，查看调用堆栈。有时你会得到线程的局部变量，但不要指望太多，因为数据可能不正确。