一个由 Autofac 引起的棘手的 IIS 死锁答案

【问题标题】：A thorny IIS deadlock caused by Autofac一个由 Autofac 引起的棘手的 IIS 死锁
【发布时间】：2013-03-08 03:30:15
【问题描述】：

我是 Autofac 用户，现在面临一个非常头疼的问题。电子邮件 Alex 和 Travis 向我提出了这个问题，并得到了他们的回复，在这里，感谢他们的帮助。为了彻底检查这个问题，我接受了 Travis 的建议，并在此处发布了详细信息。

我的电子邮件：

我们在 mvc3 项目中使用 Autofac 2.6.3.862。

现在我们来看看IIS死锁问题很严重，服务器经常挂了，我们用微软调试诊断工具来做分析（导致附上分析报告），初步怀疑成为 LifetimeScope 中的锁

我已经阅读了您的文章，但是对于一些技术细节还不清楚我。我们的大多数 Register() 组件都是 SingleInstance，所以当 Resolve() 我不使用子生命周期范围，例如使用 (var scope = Container.BeginLifetimeScope())

，不知道这是不是死锁的原因。

调试诊断分析报告

The following threads in 
w3wp.exe__hg__PID__3904__Date__03_07_2013__Time_11_01_07AM__974__Manual Dump.dmp are waiting to enter a .NET Lock which thread 39 is currently holding    
( 26 34 42 43 44 45 46 47 48 )    
16.67% of threads blocked    

======================================================================================

Detected possible blocking or leaked critical section at 0x0e758a00 owned by thread 26 in w3wp.exe__hg__PID__3904__Date__03_07_2013__Time_11_01_07AM__974__Manual Dump.dmp 

Impact of this lock    
1.85% of threads blocked

(Threads 39)

The following functions are trying to enter this critical section

clr!UnsafeEEEnterCriticalSection+1c    

The following module(s) are involved with this critical section

C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll

======================================================================================

Thread 26 - System ID 7628
Entry point   0x00000000 
Create time   2013/3/7 10:44:15 
Time spent in user mode   0 Days 00:00:00.218 
Time spent in kernel mode   0 Days 00:00:00.343 




This thread is waiting to enter a .NET Lock which thread 39 is currently holding



.NET Call Stack



Function 
System.Threading.Monitor.ReliableEnter(System.Object, Boolean ByRef) 
System.Threading.Monitor.Enter(System.Object, Boolean ByRef) 
Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(Autofac.Core.IComponentRegistration, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Container.ResolveComponent(Autofac.Core.IComponentRegistration, System.Collections.Generic.IEnumerable`1) 
Autofac.ResolutionExtensions.TryResolveService(Autofac.IComponentContext, Autofac.Core.Service, System.Collections.Generic.IEnumerable`1, System.Object ByRef) 
Autofac.ResolutionExtensions.ResolveService(Autofac.IComponentContext, Autofac.Core.Service, System.Collections.Generic.IEnumerable`1) 
Autofac.ResolutionExtensions.Resolve[[System.__Canon, mscorlib]](Autofac.IComponentContext, System.Collections.Generic.IEnumerable`1) 
Autofac.ResolutionExtensions.Resolve[[System.__Canon, mscorlib]](Autofac.IComponentContext) 
Tunynet.DIContainer.Resolve[[System.__Canon, mscorlib]]() 
Spacebuilder.Common.ProfileRepository..cctor() 
Spacebuilder.Common.ProfileRepository..ctor() 
Spacebuilder.Common.UserProfileService..ctor() 
Spacebuilder.Common.User.get_Profile() 
ASP._Page_Themes_Channel_Default_Views_FindUser__QuickSearch_cshtml.Execute() 
System.Web.WebPages.WebPageBase.ExecutePageHierarchy() 
System.Web.Mvc.WebViewPage.ExecutePageHierarchy() 
Tunynet.UI.ThemedWebViewPage.ExecutePageHierarchy() 
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(System.Web.WebPages.WebPageContext, System.IO.TextWriter, System.Web.WebPages.WebPageRenderingBase) 
Tunynet.UI.ThemedRazorView.RenderView(System.Web.Mvc.ViewContext, System.IO.TextWriter, System.Object) 
System.Web.Mvc.BuildManagerCompiledView.Render(System.Web.Mvc.ViewContext, System.IO.TextWriter) 
System.Web.Mvc.ViewResultBase.ExecuteResult(System.Web.Mvc.ControllerContext) 
System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(System.Web.Mvc.ControllerContext, System.Web.Mvc.ActionResult) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c.b__19() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(System.Web.Mvc.IResultFilter, System.Web.Mvc.ResultExecutingContext, System.Func`1) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c+<>c__DisplayClass1e.b__1b() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(System.Web.Mvc.IResultFilter, System.Web.Mvc.ResultExecutingContext, System.Func`1) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c+<>c__DisplayClass1e.b__1b() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(System.Web.Mvc.IResultFilter, System.Web.Mvc.ResultExecutingContext, System.Func`1) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c+<>c__DisplayClass1e.b__1b() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(System.Web.Mvc.IResultFilter, System.Web.Mvc.ResultExecutingContext, System.Func`1) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c+<>c__DisplayClass1e.b__1b() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(System.Web.Mvc.ControllerContext, System.Collections.Generic.IList`1, System.Web.Mvc.ActionResult) 
System.Web.Mvc.ControllerActionInvoker.InvokeAction(System.Web.Mvc.ControllerContext, System.String) 
System.Web.Mvc.Controller.ExecuteCore() 
System.Web.Mvc.ControllerBase.Execute(System.Web.Routing.RequestContext) 
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(System.Web.Routing.RequestContext) 
System.Web.Mvc.MvcHandler+<>c__DisplayClass6+<>c__DisplayClassb.b__5() 
System.Web.Mvc.Async.AsyncResultWrapper+<>c__DisplayClass1.b__0() 
System.Web.Mvc.Async.AsyncResultWrapper+<>c__DisplayClass8`1[[System.Web.Mvc.Async.AsyncVoid, System.Web.Mvc]].b__7(System.IAsyncResult) 
System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResult`1[[System.Web.Mvc.Async.AsyncVoid, System.Web.Mvc]].End() 
System.Web.Mvc.MvcHandler+<>c__DisplayClasse.b__d() 
System.Web.Mvc.SecurityUtil.b__0(System.Action) 
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(System.Action) 
System.Web.Mvc.MvcHandler.EndProcessRequest(System.IAsyncResult) 
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(System.IAsyncResult) 
System.Web.HttpApplication+CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 
System.Web.HttpApplication.ExecuteStep(IExecutionStep, Boolean ByRef) 
System.Web.HttpApplication+PipelineStepManager.ResumeSteps(System.Exception) 
System.Web.HttpApplication.BeginProcessRequestNotification(System.Web.HttpContext, System.AsyncCallback) 
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(System.Web.Hosting.IIS7WorkerRequest, System.Web.HttpContext) 
System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32) 
System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32) 
DomainNeutralILStubClass.IL_STUB_PInvoke(IntPtr, System.Web.RequestNotificationStatus ByRef) 
System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr, System.Web.RequestNotificationStatus ByRef) 
System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32) 
System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32) 


Full Call Stack



Function   Source 
ntdll!KiFastSystemCallRet    
ntdll!NtWaitForMultipleObjects+c    
KERNELBASE!WaitForMultipleObjectsEx+100    
kernel32!WaitForMultipleObjectsExImplementation+e0    
clr!WaitForMultipleObjectsEx_SO_TOLERANT+56    
clr!Thread::DoAppropriateAptStateWait+4d    
clr!Thread::DoAppropriateWaitWorker+17d    
clr!Thread::DoAppropriateWait+60    
clr!CLREvent::WaitEx+106    
clr!CLREvent::Wait+19    
clr!AwareLock::EnterEpilogHelper+a8    
clr!AwareLock::EnterEpilog+42    
clr!AwareLock::Enter+5f    
clr!AwareLock::Contention+228    
clr!JITutil_MonReliableContention+e8    
System.Threading.Monitor.Enter(System.Object, Boolean ByRef)    
clr!CallDescrWorker+33    
clr!CallDescrWorkerWithHandler+8e    
clr!DispatchCallBody+20    
clr!DispatchCallDebuggerWrapper+75    
clr!DispatchCallNoEH+53    
clr!MethodTable::RunClassInitEx+f1    
clr!MethodTable::DoRunClassInitThrowing+53e    
clr!MethodDesc::DoPrestub+f1    
clr!PreStubWorker+12c    
0x00f80842    
clr!MethodTable::GetRestoredSlot+2a    
clr!MethodDesc::GetMethodEntryPoint+4e    
clr!MethodDesc::DoPrestub+51d    
clr!PreStubWorker+15d    
0x00f80842    
System.Web.WebPages.WebPageBase.ExecutePageHierarchy()    
System.Web.Mvc.WebViewPage.ExecutePageHierarchy()    
System.Collections.Generic.Stack`1[[System.__Canon, mscorlib]].Push(System.__Canon)    
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(System.Web.WebPages.WebPageContext, System.IO.TextWriter, System.Web.WebPages.WebPageRenderingBase)    
System.RuntimeType+ActivatorCacheEntry..ctor(System.Type, System.RuntimeMethodHandleInternal, Boolean)    
System.Web.Mvc.BuildManagerCompiledView.Render(System.Web.Mvc.ViewContext, System.IO.TextWriter)    
System.Web.Mvc.ViewResultBase.ExecuteResult(System.Web.Mvc.ControllerContext)    
System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(System.Web.Mvc.ControllerContext, System.Web.Mvc.ActionResult)    
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19()    
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(System.Web.Mvc.IResultFilter, System.Web.Mvc.ResultExecutingContext, System.Func`1<System.Web.Mvc.ResultExecutedContext>)    
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c+<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b()    
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c+<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b()    
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c+<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b()    
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass1c+<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b()    
System.Web.Mvc.ControllerActionInvoker.InvokeAction(System.Web.Mvc.ControllerContext, System.String)    
System.Web.Mvc.Controller.ExecuteCore()    
System.Web.Mvc.ControllerBase.Execute(System.Web.Routing.RequestContext)    
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(System.Web.Routing.RequestContext)    
System.Web.Mvc.MvcHandler+<>c__DisplayClass6+<>c__DisplayClassb.<BeginProcessRequest>b__5()    
System.Web.Mvc.Async.AsyncResultWrapper+<>c__DisplayClass1.<MakeVoidDelegate>b__0()    
System.Web.Mvc.MvcHandler+<>c__DisplayClasse.<EndProcessRequest>b__d()    
System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(System.Action)    
System.Web.Mvc.MvcHandler.EndProcessRequest(System.IAsyncResult)    
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(System.IAsyncResult)    
System.Web.HttpApplication+CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()    
System.Web.HttpApplication.ExecuteStep(IExecutionStep, Boolean ByRef)    
System.Web.HttpApplication+PipelineStepManager.ResumeSteps(System.Exception)    
System.Web.HttpApplication.BeginProcessRequestNotification(System.Web.HttpContext, System.AsyncCallback)    
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(System.Web.Hosting.IIS7WorkerRequest, System.Web.HttpContext)    
System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32)    
System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32)    
webengine4!W3_MGD_HANDLER::ProcessNotification+5b    
webengine4!W3_MGD_HANDLER::DoWork+250    
webengine4!RequestDoWork+2da    
webengine4!CMgdEngHttpModule::OnExecuteRequestHandler+1a    
iiscore!NOTIFICATION_CONTEXT::RequestDoWork+128    
iiscore!NOTIFICATION_CONTEXT::CallModulesInternal+305    
iiscore!NOTIFICATION_CONTEXT::CallModules+28    
iiscore!W3_CONTEXT::DoStateRequestExecuteHandler+36    
iiscore!W3_CONTEXT::DoWork+d7    
iiscore!W3_MAIN_CONTEXT::ContinueNotificationLoop+1f    
iiscore!W3_MAIN_CONTEXT::ProcessIndicateCompletion+1f    
iiscore!W3_CONTEXT::IndicateCompletion+75    
webengine4!W3_MGD_HANDLER::IndicateCompletion+3d    
webengine4!MgdIndicateCompletion+24    
DomainNeutralILStubClass.IL_STUB_PInvoke(IntPtr, System.Web.RequestNotificationStatus ByRef)    
System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32)    
System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32)    
clr!UM2MThunk_WrapperHelper+10    
clr!UM2MThunk_Wrapper+8c    
clr!Thread::DoADCallBack+f0    
clr!UM2MDoADCallBack+c0    
0x00f98c20    
webengine4!W3_MGD_HANDLER::ProcessNotification+5b    
webengine4!ProcessNotificationCallback+36    
clr!UnManagedPerAppDomainTPCount::DispatchWorkItem+195    
clr!ThreadpoolMgr::NewWorkerThreadStart+20b    
clr!ThreadpoolMgr::WorkerThreadStart+3d1    
clr!Thread::intermediateThreadProc+4b    
kernel32!BaseThreadInitThunk+e    
ntdll!__RtlUserThreadStart+70    
ntdll!_RtlUserThreadStart+1b 


=========================================================================

Thread 39 - System ID 4176
Entry point   0x00000000 
Create time   2013/3/7 10:44:21 
Time spent in user mode   0 Days 00:00:00.140 
Time spent in kernel mode   0 Days 00:00:00.109 




This thread is not fully resolved and may or may not be a problem. Further analysis of these threads may be required.



.NET Call Stack



Function 
Spacebuilder.Common.ProfileRepository..ctor() 
Spacebuilder.Common.UserProfileService..ctor() 
Spacebuilder.Common.UserSearcher..ctor(System.String, System.String, Boolean, Int32) 
Spacebuilder.Environments.Starter.b__54(Autofac.IComponentContext) 
Autofac.RegistrationExtensions+<>c__DisplayClass10`1[[System.__Canon, mscorlib]].b__f(Autofac.IComponentContext, System.Collections.Generic.IEnumerable`1) 
Autofac.Builder.RegistrationBuilder+<>c__DisplayClass1`1[[System.__Canon, mscorlib]].b__0(Autofac.IComponentContext, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(Autofac.IComponentContext, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Resolving.InstanceLookup.Activate(System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Resolving.InstanceLookup.b__0() 
Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(System.Guid, System.Func`1) 
Autofac.Core.Resolving.InstanceLookup.Execute() 
Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(Autofac.Core.ISharingLifetimeScope, Autofac.Core.IComponentRegistration, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Resolving.InstanceLookup.ResolveComponent(Autofac.Core.IComponentRegistration, System.Collections.Generic.IEnumerable`1) 
Autofac.Features.Collections.CollectionRegistrationSource+<>c__DisplayClass4+<>c__DisplayClass6.b__1(Autofac.Core.IComponentRegistration) 
System.Linq.Enumerable+WhereSelectArrayIterator`2[[System.__Canon, mscorlib],[System.__Canon, mscorlib]].MoveNext() 
System.Linq.Buffer`1[[System.__Canon, mscorlib]]..ctor(System.Collections.Generic.IEnumerable`1) 
System.Linq.Enumerable.ToArray[[System.__Canon, mscorlib]](System.Collections.Generic.IEnumerable`1) 
Autofac.Features.Collections.CollectionRegistrationSource+<>c__DisplayClass4.b__0(Autofac.IComponentContext, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(Autofac.IComponentContext, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Resolving.InstanceLookup.Activate(System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Resolving.InstanceLookup.Execute() 
Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(Autofac.Core.ISharingLifetimeScope, Autofac.Core.IComponentRegistration, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Resolving.ResolveOperation.Execute(Autofac.Core.IComponentRegistration, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(Autofac.Core.IComponentRegistration, System.Collections.Generic.IEnumerable`1) 
Autofac.Core.Container.ResolveComponent(Autofac.Core.IComponentRegistration, System.Collections.Generic.IEnumerable`1) 
Autofac.ResolutionExtensions.TryResolveService(Autofac.IComponentContext, Autofac.Core.Service, System.Collections.Generic.IEnumerable`1, System.Object ByRef) 
Autofac.ResolutionExtensions.ResolveService(Autofac.IComponentContext, Autofac.Core.Service, System.Collections.Generic.IEnumerable`1) 
Autofac.ResolutionExtensions.Resolve[[System.__Canon, mscorlib]](Autofac.IComponentContext, System.Collections.Generic.IEnumerable`1) 
Autofac.ResolutionExtensions.Resolve[[System.__Canon, mscorlib]](Autofac.IComponentContext) 
Tunynet.DIContainer.Resolve[[System.__Canon, mscorlib]]() 
Spacebuilder.Search.SearcherFactory.GetSearcher(System.String) 
Spacebuilder.Common.FindUserController._InterestedWithAll(Int32, Int32, System.String) 
DynamicClass.lambda_method(System.Runtime.CompilerServices.Closure, System.Web.Mvc.ControllerBase, System.Object[]) 
System.Web.Mvc.ActionMethodDispatcher.Execute(System.Web.Mvc.ControllerBase, System.Object[]) 
System.Web.Mvc.ReflectedActionDescriptor.Execute(System.Web.Mvc.ControllerContext, System.Collections.Generic.IDictionary`2) 
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(System.Web.Mvc.ControllerContext, System.Web.Mvc.ActionDescriptor, System.Collections.Generic.IDictionary`2) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass15.b__12() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(System.Web.Mvc.IActionFilter, System.Web.Mvc.ActionExecutingContext, System.Func`1) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass15+<>c__DisplayClass17.b__14() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(System.Web.Mvc.IActionFilter, System.Web.Mvc.ActionExecutingContext, System.Func`1) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass15+<>c__DisplayClass17.b__14() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(System.Web.Mvc.IActionFilter, System.Web.Mvc.ActionExecutingContext, System.Func`1) 
System.Web.Mvc.ControllerActionInvoker+<>c__DisplayClass15+<>c__DisplayClass17.b__14() 
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(System.Web.Mvc.ControllerContext, System.Collections.Generic.IList`1, System.Web.Mvc.ActionDescriptor, System.Collections.Generic.IDictionary`2) 
System.Web.Mvc.ControllerActionInvoker.InvokeAction(System.Web.Mvc.ControllerContext, System.String) 
System.Web.Mvc.Controller.ExecuteCore() 
System.Web.Mvc.ControllerBase.Execute(System.Web.Routing.RequestContext) 
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(System.Web.Routing.RequestContext) 
System.Web.Mvc.MvcHandler+<>c__DisplayClass6+<>c__DisplayClassb.b__5() 
System.Web.Mvc.Async.AsyncResultWrapper+<>c__DisplayClass1.b__0() 
System.Web.Mvc.Async.AsyncResultWrapper+<>c__DisplayClass8`1[[System.Web.Mvc.Async.AsyncVoid, System.Web.Mvc]].b__7(System.IAsyncResult) 
System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResult`1[[System.Web.Mvc.Async.AsyncVoid, System.Web.Mvc]].End() 
System.Web.Mvc.MvcHandler+<>c__DisplayClasse.b__d() 
System.Web.Mvc.SecurityUtil.b__0(System.Action) 
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(System.Action) 
System.Web.Mvc.MvcHandler.EndProcessRequest(System.IAsyncResult) 
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(System.IAsyncResult) 
System.Web.HttpApplication+CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 
System.Web.HttpApplication.ExecuteStep(IExecutionStep, Boolean ByRef) 
System.Web.HttpApplication+PipelineStepManager.ResumeSteps(System.Exception) 
System.Web.HttpApplication.BeginProcessRequestNotification(System.Web.HttpContext, System.AsyncCallback) 
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(System.Web.Hosting.IIS7WorkerRequest, System.Web.HttpContext) 
System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32) 
System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32) 
DomainNeutralILStubClass.IL_STUB_PInvoke(IntPtr, System.Web.RequestNotificationStatus ByRef) 
System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr, System.Web.RequestNotificationStatus ByRef) 
System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32) 
System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32) 


Full Call Stack



Function   Source 
ntdll!KiFastSystemCallRet    
ntdll!NtWaitForSingleObject+c    
ntdll!RtlpWaitOnCriticalSection+13e    
ntdll!RtlEnterCriticalSection+150    
clr!UnsafeEEEnterCriticalSection+1c    
clr!CrstBase::Enter+1ad    
clr!ListLockEntry::FinishDeadlockAwareEnter+25    
clr!ListLockEntry::LockHolder::DeadlockAwareAcquire+28    
clr!MethodTable::DoRunClassInitThrowing+4c2    
clr!MethodDesc::DoPrestub+f1    
clr!PreStubWorker+12c    
0x00f80842    
clr!PreStubWorker+165    
System.Linq.Enumerable+WhereSelectArrayIterator`2[[System.__Canon, mscorlib],[System.__Canon, mscorlib]].MoveNext()    
System.Linq.Buffer`1[[System.__Canon, mscorlib]]..ctor(System.Collections.Generic.IEnumerable`1<System.__Canon>)    
System.Linq.Enumerable.ToArray[[System.__Canon, mscorlib]](System.Collections.Generic.IEnumerable`1<System.__Canon>)    
System.Collections.Generic.Stack`1[[System.__Canon, mscorlib]].Push(System.__Canon)    
clr!JIT_Stelem_Ref+25    
System.Collections.Generic.Stack`1[[System.__Canon, mscorlib]].Push(System.__Canon)

Alex 回复：

这听起来确实很棘手。 DIContainer 类在做什么你有注册为 InstancePerHttpRequest 的组件吗？或 InstancePerLifetimeScope？似乎也有一些石英工作在后台，它们是如何与容器交互的？

特拉维斯回复：

快速查看堆栈跟踪表明您可能有一些长时间运行的操作或发生在 Spacebuilder.Environments.Starter, Spacebuilder.Common.UserSearcher.ctor, Spacebuilder.UserProfileService.ctor，或 Spacebuilder.Common.ProfileRepository。我看到的是有趣的是，在 RESOLVE 操作期间，无论何时组件得到解决，有一个内部寄存器正在进行。没有看到代码，我无法告诉你那里发生了什么，但是那个线程 - #39 - 这就是我要看的东西。

看起来...正在调用一个控制器操作有一些一种在闭包上运行的 lambda (DynamicClass.lambda_method) - 在你的管道中定制一些东西。 SearcherFactory.GetSearcher 手动尝试解决 smothing。在决议期间 GetSearcher，有东西要求收集 - 比如 IEnumerable 服务。构造函数参数？这是它的地方变得奇怪：在解决 IEnumerable 时，一个新的生命周期范围正在创建，并且似乎正在注册某些内容它？ LifetimeScope.ResolveComponent 调用确实做了一个锁确保分辨率是线程安全的。你陷入僵局的事实意味着两个不同的线程正在尝试解决相同的问题生命周期范围（容器？），在 MVC 中是要避免的事情 - 例如，您可能不会遇到这种情况，如果您只在 HttpRequest 生命周期范围之外解析，因为您一次只能在一个线程上使用它。或者，您可以为了执行目的，在应用程序中传递生命周期范围服务位置，这也可能是一个危险信号。

有一个关于并发的 wiki 页面也可以给你一些指点：https://code.google.com/p/autofac/wiki/Concurrency

如果这不能让你朝着你需要的方向前进，我建议你再次发布到讨论论坛，因为我真的不能必须及时提供个人帮助。那会得到其他人的眼睛，可能会更快地得到你的帮助。您需要包括：问题的描述（就像在这封电子邮件中一样），但有更多有关您期望发生的事情的详细信息（例如，您正在访问一个执行 blah blah blah 的控制器动作）。的堆栈跟踪阻塞线程。事情被阻塞的代码：您最初的 ContainerBuilder 注册以显示情况如何注册。那些构造函数和东西里面有什么挂了。该信息将帮助人们更快地根除问题。这也是你应该尊重的东西事情被锁定

我的补充问题详情：

服务器经常不规律的挂起，浏览器会突然停止响应我们使用iisreset命令重启服务器。我不确定当时是否调用了控制器或触发了某些 Quartz 任务。

在 Application_Start() 中，我们使用 ContainerBuilder.Register() 在同一根生命周期范围内注册许多组件。并且这些组件可以相互调用。

大部分注册为SingleInstance，如：

containerBuilder.Register(c => new DefaultCacheService(new MemcachedCache())).As<ICacheService>().SingleInstance();
containerBuilder.Register(c => new QuartzTaskScheduler()).As<ITaskScheduler>().SingleInstance();
containerBuilder.Register(c => new UserService()).As<IUserService>().SingleInstance();
containerBuilder.Register(c => new UserSearcher("~/App_Data/IndexFiles/User")).As<ISearcher>().SingleInstance();
containerBuilder.Register(c => new TagSearcher("~/App_Data/IndexFiles/Tag")).As<ISearcher>().SingleInstance();

只有少数注册为InstancePerHttpRequest，这些组件的初始化与每个请求相关。如：

containerBuilder.Register(c => new FormsAuthenticationService()).As<IAuthenticationService>().InstancePerHttpRequest();

我们提供了一个类（DIContainer），包括一些简单的静态方法来解析组件。在解析组件时调用静态方法，例如在某些 Controller、Service、Repository(DAO) 或 Quartz 任务中。

IContainer container = containerBuilder.Build();
DIContainer.RegisterContainer(container); 
DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

public class DIContainer
{
   private static IContainer _container;

   public static void RegisterContainer(IContainer container)
   {
       _container = container;
   }

   public static TService Resolve<TService>()
   {
       return _container.Resolve<TService>();
   }
   ......
}

我们使用Lucene.Net做全文搜索服务，每个ISearcher对应一种搜索类型和一个索引目录。需要时在 SearcherFactory.GetSearcher() 中解析 ISearcher。

public static ISearcher GetSearcher(string IndexPath)
{
   return DIContainer.Resolve<IEnumerable<ISearcher>>().Where(s => s.IndexPath.Equals(IndexPath, StringComparison.InvariantCultureIgnoreCase)).FirstOrDefault();
}

是这样，但我仍然无法找出根本原因。希望得到您的帮助。

【问题讨论】：

很难说没有看到所有代码和堆栈跟踪，但第一个危险信号是“我们提供了一个类（DIContainer），其中包含一些用于组件解析的简单静态方法。” static 代码。你为什么还要像这样继续解析ISearcher 实例？它们不是 SearcherFactory 生命周期的固定集合，因此被注入到它的构造函数中吗？
鉴于持有锁的线程位于Spacebuilder.Common.ProfileRepository..ctor()、Spacebuilder.Common.UserProfileService..ctor()、Spacebuilder.Common.UserSearcher..ctor(System.String, System.String, Boolean, Int32)、Spacebuilder.Environments.Starter.b__54(Autofac.IComponentContext) 链中，我们可能需要查看该代码（如我原始回复中所述）。

标签： iis deadlock autofac

【解决方案1】：

Resolve方法的内部实现是LifetimeScope.GetOrCreateAndShare，该方法使用线程锁。查看ProfileRepository的静态构造函数，可能构造函数的线程锁和autofac的线程锁构成死锁。

【讨论】：