Ninject 在 appharbor 上启动应用程序时崩溃

我在部署在 appharbor 上的 MVC 3 项目上使用 Ninject。我注意到应用程序启动时出现异常，看起来 Ninject 内部的某些内容是原因，但我找不到任何答案 - 所以请帮助我:)

将尝试在此处添加完整的异常：

Server Error in '/' Application.

Object reference not set to an instance of an object.

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.NullReferenceException: Object reference not set to an instance of an object.

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: 


[NullReferenceException: Object reference not set to an instance of an object.]
   NewRelic.Agent.Core.AgentShim.GetTracer(String tracerFactoryName, UInt32 level, String metricName, String assemblyName, String className, String methodName, String argumentSignature, Object invocationTarget) +51
   System.AppDomain.CreateDomain(String friendlyName, Evidence securityInfo, AppDomainSetup info) +99
   Ninject.Modules.AssemblyNameRetriever.CreateTemporaryAppDomain() in c:\Projects\Ninject\ninject\src\Ninject\Modules\AssemblyNameRetriever.cs:68
   Ninject.Modules.AssemblyNameRetriever.GetAssemblyNames(IEnumerable`1 filenames, Predicate`1 filter) in c:\Projects\Ninject\ninject\src\Ninject\Modules\AssemblyNameRetriever.cs:47
   Ninject.Modules.CompiledModuleLoaderPlugin.LoadModules(IEnumerable`1 filenames) in c:\Projects\Ninject\ninject\src\Ninject\Modules\CompiledModuleLoaderPlugin.cs:81
   Ninject.Modules.ModuleLoader.LoadModules(IEnumerable`1 patterns) in c:\Projects\Ninject\ninject\src\Ninject\Modules\ModuleLoader.cs:60
   Ninject.KernelBase.Load(IEnumerable`1 filePatterns) in c:\Projects\Ninject\ninject\src\Ninject\KernelBase.cs:236
   Ninject.KernelBase..ctor(IComponentContainer components, INinjectSettings settings, INinjectModule[] modules) in c:\Projects\Ninject\ninject\src\Ninject\KernelBase.cs:97
   Ninject.KernelBase..ctor(INinjectModule[] modules) in c:\Projects\Ninject\ninject\src\Ninject\KernelBase.cs:57
   Ninject.StandardKernel..ctor(INinjectModule[] modules) in c:\Projects\Ninject\ninject\src\Ninject\StandardKernel.cs:46
   Checkin.App_Start.NinjectWebCommon.CreateKernel() in d:\temp\44uvjuob.32m\input\Checkin\App_Start\NinjectWebCommon.cs:43
   Ninject.Web.Common.Bootstrapper.Initialize(Func`1 createKernelCallback) in c:\Projects\Ninject\Ninject.Web.Common\src\Ninject.Web.Common\Bootstrapper.cs:50
   Checkin.App_Start.NinjectWebCommon.Start() in d:\temp\44uvjuob.32m\input\Checkin\App_Start\NinjectWebCommon.cs:26

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner) +0
   System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner) +69
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +242
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +21
   System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) +19
   WebActivator.BaseActivationMethodAttribute.InvokeMethod() +223
   WebActivator.ActivationManager.RunActivationMethods() +493
   WebActivator.ActivationManager.RunPreStartMethods() +28
   WebActivator.ActivationManager.Run() +55

[InvalidOperationException: The pre-application start initialization method Run on type WebActivator.ActivationManager threw an exception with the following error message: Exception has been thrown by the target of an invocation..]
   System.Web.Compilation.BuildManager.InvokePreStartInitMethods(ICollection`1 methods) +377
   System.Web.Compilation.BuildManager.CallPreStartInitMethods() +267
   System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +690

[HttpException (0x80004005): The pre-application start initialization method Run on type WebActivator.ActivationManager threw an exception with the following error message: Exception has been thrown by the target of an invocation..]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +532
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +90
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +172

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272

如果我重新加载页面 - 异常就会消失。 这可能与使用 ninject 作为过滤器有关：

this.BindFilter<AdminAuthorizationAttribute>(FilterScope.Controller, -100)
    .When((context, ad) => context.RouteData.DataTokens["area"] != null &&
            ((string)context.RouteData.DataTokens["area"]).ToLower() == "admin" && 
            ((string)context.RouteData.Values["controller"]).ToLower() != "login");

该问题不是由 Ninject 引起的。罪魁祸首是 NewRelic.Agent.Core.AgentShim（由 AppHarbor 使用）。

虽然查看堆栈跟踪，但我认为您可以通过禁用 Ninject 的自动扩展加载功能并手动加载它们来解决此问题。

var kernel = new StandardKernel(new NinjectSettings { LoadExtensions = false })
kernel.Load(new Ninject.Web.Mvc.MvcModule()); // same for all other extension modules