c# - Punto muerto en System.Component.TypeDescriptor

.net entity-framework-4

Question

He pasado mucho tiempo (buscando en Google, reflejando binarios de .net, etc.) tratando de resolver el siguiente problema:

Veo un punto muerto en nuestra aplicación (ASP.NET MVC + EF4). Tenemos varios contextos de EF que se crean al comienzo de la solicitud y se eliminan al final. A veces tenemos la siguiente situación: ASP.NET crea un hilo por solicitud y luego el hilo entra en un estado "in join or sleep" cuando accede al contexto de EF.

La mayoría de los subprocesos bloqueados tienen un seguimiento de pila de la siguiente manera:

    System.dll!System.ComponentModel.TypeDescriptor.Refresh(object component, bool refreshReflectionProvider) + 0x97 bytes    
    System.Data.dll!System.Data.SqlClient.SqlCommand.DesignTimeVisible.set(bool value) + 0x22 bytes    
    System.Data.dll!System.Data.SqlClient.SqlCommand.SqlCommand(System.Data.SqlClient.SqlCommand from) + 0xc9 bytes    
    System.Data.dll!System.Data.SqlClient.SqlCommand.Clone() + 0x27 bytes    
    System.Data.dll!System.Data.SqlClient.SqlCommand.System.ICloneable.Clone() + 0x9 bytes    
    System.Data.Entity.dll!System.Data.Common.DbCommandDefinition.CreateCommandDefinition(System.Data.Common.DbCommand prototype) + 0x47 bytes    
    System.Data.Entity.dll!System.Data.SqlClient.SqlProviderServices.CreateDbCommandDefinition(System.Data.Common.DbProviderManifest providerManifest, System.Data.Common.CommandTrees.DbCommandTree commandTree) + 0x21 bytes    
    System.Data.Entity.dll!System.Data.EntityClient.EntityCommandDefinition.EntityCommandDefinition(System.Data.Common.DbProviderFactory storeProviderFactory, System.Data.Common.CommandTrees.DbCommandTree commandTree) + 0x2a1 bytes    
    System.Data.Entity.dll!System.Data.EntityClient.EntityProviderServices.CreateDbCommandDefinition(System.Data.Common.DbProviderManifest providerManifest, System.Data.Common.CommandTrees.DbCommandTree commandTree) + 0x8e bytes    
    System.Data.Entity.dll!System.Data.Objects.Internal.ObjectQueryExecutionPlan.Prepare(System.Data.Objects.ObjectContext context, System.Data.Common.CommandTrees.DbQueryCommandTree tree, System.Type elementType, System.Data.Objects.MergeOption mergeOption, System.Data.Objects.Span span, System.Collections.ObjectModel.ReadOnlyCollection<System.Collections.Generic.KeyValuePair<System.Data.Objects.ObjectParameter,System.Data.Objects.ELinq.QueryParameterExpression>> compiledQueryParameters) + 0x113 bytes    
    System.Data.Entity.dll!System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(System.Data.Objects.MergeOption? forMergeOption) + 0x310 bytes    
    System.Data.Entity.dll!System.Data.Objects.ObjectQuery<CompuTool.Business.Portal.Desktop>.GetResults(System.Data.Objects.MergeOption? forMergeOption) + 0x55 bytes    
    System.Data.Entity.dll!System.Data.Objects.ObjectQuery<System.__Canon>.System.Collections.Generic.IEnumerable<T>.GetEnumerator() + 0x2f bytes    
    System.Core.dll!System.Linq.Enumerable.SingleOrDefault<CompuTool.Business.Portal.Desktop>(System.Collections.Generic.IEnumerable<CompuTool.Business.Portal.Desktop> source) + 0x10f bytes    
    System.Core.dll!System.Linq.Queryable.SingleOrDefault<CompuTool.Business.Portal.Desktop>(System.Linq.IQueryable<CompuTool.Business.Portal.Desktop> source, System.Linq.Expressions.Expression<System.Func<CompuTool.Business.Portal.Desktop,bool>> predicate) + 0x24e bytes    
>    CompuTool.Presentation.Web.dll!CompuTool.Presentation.Web.Controllers.DesktopStateController.ValidateRequest(CompuTool.Business.Portal.DesktopManagerContext dataContext, CompuTool.Business.Portal.User user, int desktopId) Line 30 + 0x19e bytes    C#
    CompuTool.Presentation.Web.dll!CompuTool.Presentation.Web.Controllers.DesktopStateController.SetDesktopState(CompuTool.Business.Portal.User user, int desktopId, string value) Line 65 + 0x17 bytes    C#
    CompuTool.Presentation.Web.dll!CompuTool.Presentation.Web.Controllers.DesktopStateController.Set(int desktopId, string value) Line 111 + 0x13 bytes    C#
    [Lightweight Function]    
    System.Web.Mvc.dll!System.Web.Mvc.ReflectedActionDescriptor.Execute(System.Web.Mvc.ControllerContext controllerContext, System.Collections.Generic.IDictionary<string,object> parameters) + 0x108 bytes    
    System.Web.Mvc.dll!System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(System.Web.Mvc.ControllerContext controllerContext, System.Web.Mvc.ActionDescriptor actionDescriptor, System.Collections.Generic.IDictionary<string,object> parameters) + 0x27 bytes    
    System.Web.Mvc.dll!System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters.AnonymousMethod__12() + 0x81 bytes    
    System.Web.Mvc.dll!System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(System.Web.Mvc.IActionFilter filter, System.Web.Mvc.ActionExecutingContext preContext, System.Func<System.Web.Mvc.ActionExecutedContext> continuation) + 0xe6 bytes    
    System.Web.Mvc.dll!System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(System.Web.Mvc.ControllerContext controllerContext, System.Collections.Generic.IList<System.Web.Mvc.IActionFilter> filters, System.Web.Mvc.ActionDescriptor actionDescriptor, System.Collections.Generic.IDictionary<string,object> parameters) + 0x13a bytes    
    System.Web.Mvc.dll!System.Web.Mvc.ControllerActionInvoker.InvokeAction(System.Web.Mvc.ControllerContext controllerContext, string actionName) + 0x15f bytes    
    System.Web.Mvc.dll!System.Web.Mvc.Controller.ExecuteCore() + 0x9f bytes    
    System.Web.Mvc.dll!System.Web.Mvc.ControllerBase.Execute(System.Web.Routing.RequestContext requestContext) + 0x14f bytes    
    System.Web.Mvc.dll!System.Web.Mvc.MvcHandler.BeginProcessRequest.AnonymousMethod__5() + 0x3e bytes    
    System.Web.Mvc.dll!System.Web.Mvc.Async.AsyncResultWrapper.MakeVoidDelegate.AnonymousMethod__0() + 0x14 bytes    
    System.Web.Mvc.dll!System.Web.Mvc.MvcHandler.EndProcessRequest.AnonymousMethod__d() + 0x36 bytes    
    System.Web.dll!System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() + 0x1d5 bytes    
    System.Web.dll!System.Web.HttpApplication.ExecuteStep(System.Web.HttpApplication.IExecutionStep step, ref bool completedSynchronously) + 0x177 bytes    
    System.Web.dll!System.Web.HttpApplication.PipelineStepManager.ResumeSteps(System.Exception error) + 0x6f5 bytes    
    System.Web.dll!System.Web.HttpApplication.BeginProcessRequestNotification(System.Web.HttpContext context, System.AsyncCallback cb) + 0x85 bytes    
    System.Web.dll!System.Web.HttpRuntime.ProcessRequestNotificationPrivate(System.Web.Hosting.IIS7WorkerRequest wr, System.Web.HttpContext context) + 0x2b6 bytes    
    System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(System.IntPtr managedHttpContext, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags) + 0x3bf bytes    
    System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(System.IntPtr managedHttpContext, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags) + 0x22 bytes    
    [Native to Managed Transition]    
    [Managed to Native Transition]    
    System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(System.IntPtr managedHttpContext, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags) + 0x4f4 bytes    
    System.Web.dll!System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(System.IntPtr managedHttpContext, System.IntPtr nativeRequestContext, System.IntPtr moduleData, int flags) + 0x22 bytes 

¿Este problema está relacionado con el uso incorrecto de los contextos de Entity Framework? Gracias por la ayuda.