Run task: An entity object cannot be referenced by multiple instances of IEntityChangeTracker.

Hi guys,

Clean version of NopCommerce (from CodePlex, commit 21c5ed4b8bd2).
Go to  Administration -> Schedule tasks -> "Run now" for "Delete guests" task.
You will get an error:
An entity object cannot be referenced by multiple instances of IEntityChangeTracker.

Link to screenshot: http://screencast.com/t/UWHJXY65bS2

Stack Trace:

[InvalidOperationException: An entity object cannot be referenced by multiple instances of IEntityChangeTracker.]
   System.Data.Entity.Core.Objects.ObjectContext.VerifyContextForAddOrAttach(IEntityWrapper wrappedEntity) +178
   System.Data.Entity.Core.Objects.ObjectContext.AddSingleObject(EntitySet entitySet, IEntityWrapper wrappedEntity, String argumentName) +107
   System.Data.Entity.Core.Objects.DataClasses.EntityReference.AddEntityToObjectStateManager(IEntityWrapper wrappedEntity, Boolean doAttach) +67
   System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.AddGraphToObjectStateManager(IEntityWrapper wrappedEntity, Boolean relationshipAlreadyExists, Boolean addRelationshipAsUnchanged, Boolean doAttach) +58
   System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.IncludeEntity(IEntityWrapper wrappedEntity, Boolean addRelationshipAsUnchanged, Boolean doAttach) +289
   System.Data.Entity.Core.Objects.DataClasses.EntityReference`1.Include(Boolean addRelationshipAsUnchanged, Boolean doAttach) +234
   System.Data.Entity.Core.Objects.DataClasses.RelationshipManager.AddRelatedEntitiesToObjectStateManager(Boolean doAttach) +229
   System.Data.Entity.Core.Objects.ObjectContext.AddObject(String entitySetName, Object entity) +810
   System.Data.Entity.Internal.Linq.InternalSet`1.ActOnSet(Action action, EntityState newState, Object entity, String methodName) +202
   System.Data.Entity.Internal.Linq.InternalSet`1.Add(Object entity) +165
   System.Data.Entity.DbSet`1.Add(TEntity entity) +70
   Nop.Data.EfRepository`1.Insert(T entity) +211
   Nop.Services.Logging.DefaultLogger.InsertLog(LogLevel logLevel, String shortMessage, String fullMessage, Customer customer) +268
   Nop.Services.Logging.LoggingExtensions.Error(ILogger logger, String message, Exception exception, Customer customer) +25
   Nop.Admin.Controllers.BaseAdminController.OnException(ExceptionContext filterContext) +149
   System.Web.Mvc.ControllerActionInvoker.InvokeExceptionFilters(ControllerContext controllerContext, IList`1 filters, Exception exception) +169
   System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +203
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +111
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +53
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +19
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +51
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +111
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +606
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288

Hi Vitaly,

thanks a lot for reporting. Currently investigating it - https://nopcommerce.codeplex.com/workitem/12188

Fixed. Please have a look at changeset d73163efd9af

Thank you!

Andrei,

If I want to run async operation in ITask.Execute using Task.Run I need new its own ILifetimeScope instance because scope for HttpContext will be disposed earlier than async operation is completed.

Regards.