我目前正在开发一个将 Unity 用于 IoC 容器的 ASP.NET MVC 应用程序。该解决方案使用 SQL Azure 后端部署到 Windows Azure，并实施 Azure 缓存。
将应用程序部署到 Windows Azure 后，一切似乎都运行良好。但是经过几次请求后，我得到了错误"An attempt was made to access a socket in a way forbidden by its access permissions"。
例如，如果我浏览到该站点并反复发起 AJAX POST（例如自动完成输入）请求，它会在前几个请求中正常工作，但随后崩溃（通过在 Chrome 开发工具控制台中显示 HTTP 500 错误）。然后，如果我尝试刷新页面，我会收到套接字错误，直到应用程序重新启动或池被回收。
即使我在页面之间轻弹，我也会在一段时间后得到相同的错误，即它不仅仅与 AJAX 请求隔离。AJAX 请求只是复制问题的最快方式。
我想知道An error occurred when trying to create a controller of type 'MySite.Web.MVC.Controllers.LocationsController'. Make sure that the controller has a parameterless public constructor.]堆栈跟踪中的错误是否是一个红鲱鱼，因为控制器使用的 ILocationCacheService 映射正在由 Unity 解决。AJAX 请求在前几次有效，因此它肯定会解析映射。
在本地一切正常，或者至少我无法复制错误。
堆栈跟踪
Server Error in '/' Application.
An attempt was made to access a socket in a way forbidden by its access permissions
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.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden by its access permissions
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:
[SocketException (0x271d): An attempt was made to access a socket in a way forbidden by its access permissions]
System.Net.Sockets.Socket.DoMultipleAddressConnectCallback(Object result, MultipleAddressConnectAsyncResult context) +1847654
System.Net.Sockets.Socket.DoDnsCallback(IAsyncResult result, MultipleAddressConnectAsyncResult context) +34
System.Net.Sockets.Socket.BeginConnect(String host, Int32 port, AsyncCallback requestCallback, Object state) +271
Microsoft.ApplicationServer.Caching.SocketConnectionFactory.BeginConnect(String host, Int32 port, AsyncCallback callback, Object state, TimeSpan timeout) +469
Microsoft.ApplicationServer.Caching.TcpClientChannelFactory.BeginConnect(String host, Int32 port, AsyncCallback callback, Object state) +119
Microsoft.ApplicationServer.Caching.TcpClientChannel.ConnectAsync() +368
Microsoft.ApplicationServer.Caching.SocketClientChannel.TryGetTcpChannelUntilTimeout(TcpClientChannel clientChannel, ITcpChannel& chnl) +41
Microsoft.ApplicationServer.Caching.SocketClientChannel.Send(EndpointID endpoint, IVelocityRequestPacket packet) +188
Microsoft.ApplicationServer.Caching.SocketClientChannel.Send(EndpointID endpoint, ICreateMessage message) +112
Microsoft.ApplicationServer.Caching.SimpleSendReceiveModule.Send(EndpointID endpoint, RequestBody request, Int32 retries) +73
Microsoft.ApplicationServer.Caching.SimpleSendReceiveModule.SendMsgAndWait(EndpointID endpt, RequestBody reqMsg, TimeSpan requestTimeout, IRequestTracker& tracker) +428
Microsoft.ApplicationServer.Caching.SocketClientProtocol.SendMessage(EndpointID endPt, RequestBody request) +52
Microsoft.ApplicationServer.Caching.DataCacheFactory.EstablishConnection(IEnumerable`1 servers, RequestBody request, Func`3 sendMessageDelegate, DataCacheReadyRetryPolicy retryPolicy) +253
Microsoft.ApplicationServer.Caching.<>c__DisplayClass5.<Initialize>b__2(RequestBody req) +83
Microsoft.ApplicationServer.Caching.SocketClientProtocol.SendReceive(IVelocityRequestPacket request, Func`2 delegate, EndpointID& destination) +34
Microsoft.ApplicationServer.Caching.SocketClientProtocol.Initialize(IEnumerable`1 servers) +367
Microsoft.ApplicationServer.Caching.DataCacheFactory.GetCache(String cacheName, CreateNewCacheDelegate cacheCreationDelegate, DataCacheInitializationViaCopyDelegate initializeDelegate) +400
Microsoft.ApplicationServer.Caching.DataCacheFactory.GetCache(String cacheName) +61
Microsoft.ApplicationServer.Caching.DataCacheFactory.GetDefaultCache() +11
MySite.Services.Cache.Implementations.LocationCacheService..ctor(ILocationService locationService) +64
lambda_method(Closure , IBuilderContext ) +176
Microsoft.Practices.ObjectBuilder2.<>c__DisplayClass1.<GetBuildMethod>b__0(IBuilderContext context) +35
Microsoft.Practices.ObjectBuilder2.DynamicMethodBuildPlan.BuildUp(IBuilderContext context) +10
Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext context) +196
Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) +193
Microsoft.Practices.ObjectBuilder2.BuilderContext.NewBuildUp(NamedTypeBuildKey newBuildKey) +113
Microsoft.Practices.Unity.ObjectBuilder.NamedTypeDependencyResolverPolicy.Resolve(IBuilderContext context) +48
lambda_method(Closure , IBuilderContext ) +107
Microsoft.Practices.ObjectBuilder2.<>c__DisplayClass1.<GetBuildMethod>b__0(IBuilderContext context) +35
Microsoft.Practices.ObjectBuilder2.DynamicMethodBuildPlan.BuildUp(IBuilderContext context) +10
Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext context) +196
Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) +193
Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object existing, String name, IEnumerable`1 resolverOverrides) +165
[ResolutionFailedException: Resolution of the dependency failed, type = "MySite.Web.MVC.Controllers.LocationsController", name = "(none)".
Exception occurred while: Calling constructor MySite.Services.Cache.Implementations.LocationCacheService(MySite.Services.Interfaces.ILocationService locationService).
Exception is: SocketException - An attempt was made to access a socket in a way forbidden by its access permissions
-----------------------------------------------
At the time of the exception, the container was:
Resolving MySite.Web.MVC.Controllers.LocationsController,(none)
Resolving parameter "locationCacheService" of constructor MySite.Web.MVC.Controllers.LocationsController(MySite.Services.Cache.Interfaces.ILocationCacheService locationCacheService)
Resolving MySite.Services.Cache.Implementations.LocationCacheService,(none) (mapped from MySite.Services.Cache.Interfaces.ILocationCacheService, (none))
Calling constructor MySite.Services.Cache.Implementations.LocationCacheService(MySite.Services.Interfaces.ILocationService locationService)
]
Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object existing, String name, IEnumerable`1 resolverOverrides) +329
Microsoft.Practices.Unity.UnityContainer.Resolve(Type t, String name, ResolverOverride[] resolverOverrides) +15
Microsoft.Practices.Unity.UnityContainerExtensions.Resolve(IUnityContainer container, Type t, ResolverOverride[] overrides) +18
Unity.Mvc4.UnityDependencyResolver.GetService(Type serviceType) +67
System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +41
[InvalidOperationException: An error occurred when trying to create a controller of type 'MySite.Web.MVC.Controllers.LocationsController'. Make sure that the controller has a parameterless public constructor.]
System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +178
System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) +77
System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) +66
System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) +191
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +50
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +48
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +301
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155