Question

我们正在构建一个包含UI和API的网站，这两个网站都托管在单个ASP.NET MVC项目中（“常用”MVC + MVC WebApi在一个引擎盖下）。我们使用SimpleInjector（最新版本，2.8截至目前）进行依赖注入。我们有单一的组合根类来构建UI和API部分的容器。

最近（几周前注意到）我们在尝试访问QA中的任何API方法时都收到连接重置错误（ERR_CONNECTION_RESET）。 UAT中的相同代码工作得很好。

在本地，如果在IIS下运行，则StackOverflowException的相同代码会出错，但如果我们在附加调试器的情况下运行它，则在IIS Express和IIS下运行正常。

我们当前的代码在异常发生后附加到iis工作进程时给出以下堆栈跟踪：

    SimpleInjector.Compiled!DynamicInstanceProducer3.GetInstance(object[] constants)
    SimpleInjector.dll!SimpleInjector.CompilationHelpers.CompileInDynamicAssemblyAsClosure<System.__Canon>.AnonymousMethod__1a()
    SimpleInjector.dll!SimpleInjector.InstanceProducer.GetInstance()
    SimpleInjector.dll!SimpleInjector.Container.GetInstance(System.Type serviceType)
    System.Web.Http.dll!System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator(System.Net.Http.HttpRequestMessage request, System.Type controllerType, out System.Func<System.Web.Http.Controllers.IHttpController> activator)
    System.Web.Http.dll!System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(System.Net.Http.HttpRequestMessage request, System.Web.Http.Controllers.HttpControllerDescriptor controllerDescriptor, System.Type controllerType)
    System.Web.Http.dll!System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(System.Net.Http.HttpRequestMessage request)
    System.Web.Http.dll!System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync()
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start<System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync>(ref System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync stateMachine)
    System.Web.Http.dll!System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
    System.Net.Http.dll!System.Net.Http.HttpMessageInvoker.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
    System.Web.Http.dll!System.Web.Http.Dispatcher.HttpRoutingDispatcher.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
    System.Web.Http.dll!System.Web.Http.HttpServer.SendAsync()
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start<System.Web.Http.HttpServer.SendAsync>(ref System.Web.Http.HttpServer.SendAsync stateMachine)
    System.Web.Http.dll!System.Web.Http.HttpServer.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
    System.Net.Http.dll!System.Net.Http.HttpMessageInvoker.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
    System.Web.Http.WebHost.dll!System.Web.Http.WebHost.HttpControllerHandler.ProcessRequestAsyncCore()
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start<System.Web.Http.WebHost.HttpControllerHandler.ProcessRequestAsyncCore>(ref System.Web.Http.WebHost.HttpControllerHandler.ProcessRequestAsyncCore stateMachine)
    System.Web.Http.WebHost.dll!System.Web.Http.WebHost.HttpControllerHandler.ProcessRequestAsyncCore(System.Web.HttpContextBase contextBase)
    System.Web.dll!System.Web.TaskAsyncHelper.BeginTask(System.Func<System.Threading.Tasks.Task> taskFunc, System.AsyncCallback callback, object state)
    System.Web.dll!System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
    System.Web.dll!System.Web.HttpApplication.ExecuteStep(System.Web.HttpApplication.IExecutionStep step, ref bool completedSynchronously)
    System.Web.dll!System.Web.HttpApplication.PipelineStepManager.ResumeSteps(System.Exception error)
    System.Web.dll!System.Web.HttpApplication.BeginProcessRequestNotification(System.Web.HttpContext context, System.AsyncCallback cb)
    System.Web.dll!System.Web.HttpRuntime.ProcessRequestNotificationPrivate(System.Web.Hosting.IIS7WorkerRequest wr, System.Web.HttpContext context)
    System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(System.IntPtr rootedObjectsPointer, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags)
    System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(System.IntPtr rootedObjectsPointer, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags)
    [Native to Managed Transition]  
    [Managed to Native Transition]  
    System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(System.IntPtr rootedObjectsPointer, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags)
    System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(System.IntPtr rootedObjectsPointer, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags)
    [AppDomain Transition]

即，在我们的代码中看起来没什么不好的。

当我们采用一些旧代码（例如，当前正在生产中并且工作正常）时，我们也有StackOverflowException，但是我们的EntityFramework DB上下文的静态构造函数（代码优先）在线

Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContextType, Configuration>());

有趣的是，它不再建议使用旧代码附加到进程，因此我无法提供堆栈跟踪 - 如果我设法抓住它，我将更新问题。

请注意，通常的MVC仍然正常工作（使用相同的Composition Root类，WebApi和MVC创建模式略有自然差异）。

我可以提供更多的代码片段，如果它是合理的，但是项目非常大，所以我不确定小片段会对此有所帮助。

任何想法可能是什么？是不是因为依赖的数量？

UPDATE：在依赖于其他四个服务的其中一个服务之后，我没有出现问题我从构造函数中删除了依赖项，在那里注入了容器，并在构造函数中手动解析了依赖项。即，它是：

public MyDependentService(IDependency1 dependency1, IDependency2 dependency2, IDependency3 dependency3, IDependency4 dependency4)
{
    this.dependency1 = dependency1;
    this.dependency2 = dependency2;
    this.dependency3 = dependency3;
    this.dependency4 = dependency4;
}

它变成了

public MyDependentService(Container container)
{
    this.dependency1 = container.GetInstance<IDependency1>();
    this.dependency2 = container.GetInstance<IDependency2>();
    this.dependency3 = container.GetInstance<IDependency3>();
    this.dependency4 = container.GetInstance<IDependency4>();
}

所以现在一切正常，但当然这不是处理依赖关系的正确方法。这实际上不再是IoC。发生了什么事？

MVC WebApi项目

0 个答案: