Under load I'm getting some exceptions that look like so:
Object reference not set to an instance of an object.
Anonymously Hosted DynamicMethods Assembly
at lambda_method(Closure )
at IdeaBlade.Linq.LocalizingExpressionVisitor.ConstantizeExpression(Expression expression, Type type)
at IdeaBlade.Linq.LocalizingExpressionVisitor.MakeLocal(Expression e)
at IdeaBlade.Linq.LocalizingExpressionVisitor.VisitExpressionCore(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpression(Expression expr)
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressions(IEnumerable`1 expressions)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressionCore(Expression e)
at IdeaBlade.Linq.TransformExpressionVisitor.VisitExpressionCore(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpression(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressionCore(Expression e)
at IdeaBlade.Linq.TransformExpressionVisitor.VisitExpressionCore(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpression(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressionCore(Expression e)
at IdeaBlade.Linq.TransformExpressionVisitor.VisitExpressionCore(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpression(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressionCore(Expression e)
at IdeaBlade.Linq.TransformExpressionVisitor.VisitExpressionCore(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpression(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressionCore(Expression e)
at IdeaBlade.Linq.TransformExpressionVisitor.VisitExpressionCore(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpression(Expression expr)
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressions(IEnumerable`1 expressions)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressionCore(Expression e)
at IdeaBlade.Linq.TransformExpressionVisitor.VisitExpressionCore(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpression(Expression expr)
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressions(IEnumerable`1 expressions)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpressionCore(Expression e)
at IdeaBlade.Linq.TransformExpressionVisitor.VisitExpressionCore(Expression expr)
at IdeaBlade.Linq.ExpressionVisitor.VisitExpression(Expression expr)
at IdeaBlade.Linq.LocalizingExpressionVisitor.Visit(Expression expr)
at IdeaBlade.EntityModel.ServerEntityQuery..ctor(EntityQuery query)
at IdeaBlade.EntityModel.EntityQuery`1.GetServerQuery()
at IdeaBlade.EntityModel.EntityQueryFinder.get_ServerQuery()
at IdeaBlade.EntityModel.EntityQueryFinder.Execute()
at IdeaBlade.EntityModel.EntityManager.ExecuteQueryCore(IEntityQuery query, Boolean isAsync)
at IdeaBlade.EntityModel.EntityManager.ExecuteQuery[T](IEntityQuery`1 query)
at IdeaBlade.EntityModel.EntityQuery`1.GetEnumerator()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at IDATT.Web.Services.MobileService.GetTripData(DateTime lastSyncOn) in C:\CodeWorkspace\idatt\Code\ServerSide\IDATT.Web.Services\Rest\MobileService.cs:line 457
at IDATT.Web.Services.MobileService.GetUserTrips(String userName) in C:\CodeWorkspace\idatt\Code\ServerSide\IDATT.Web.Services\Rest\MobileService.cs:line 231
This is query executed locally. Looks like this:
var mblTrips =
this.ApplicationEntityManager.MBLTrips
.Include("DSPTruck")
.Include("DSPTrailer")
.Include("MBLTripAttributes.SYSAttribute")
.Include("MBLTripStops.LOCAddress.LOCCountry")
.Include("MBLTripStops.LOCAddress.LOCTimeZone")
.Include("MBLTripStops.MBLTripStopAttributes.SYSAttribute")
.Where(t =>
(t.DriverKey.HasValue && t.UpdatedOn > lastSyncOn && t.DriverKey.Value.Equals(this.Driver.DriverKey))
||
(!t.DriverKey.HasValue && t.MBLTripOffers.Any(to => to.UpdatedOn > lastSyncOn && to.DriverKey.Equals(this.Driver.DriverKey)))).OrderBy(t => t.TripId).ToList();
foreach (var mblTrip in mblTrips)
{
I have this exception about 10 times in my log in 10 hours and 20000 calls. What should I look for?
Also, same query produces another exception and I see this one once in a while however logging inner and actual exception doesn't make much difference as far as helping me understand what's actually wrong with it..
An error occurred while reading from the store provider's data reader. See the inner exception for details.
at IdeaBlade.EntityModel.EntityManager.HandleEntityServerException(Exception ex, Boolean tryToHandle, PersistenceOperation operation, Boolean throwOnError)
at IdeaBlade.EntityModel.EntityManager.ExecuteServerQuery(IEntityQuerySurrogate entityQuery)
at IdeaBlade.EntityModel.EntityManager.ExecuteFetch(IEntityFinder finder)
at IdeaBlade.EntityModel.EntityQueryFinder.Execute()
at IdeaBlade.EntityModel.EntityManager.ExecuteQueryCore(IEntityQuery query, Boolean isAsync)
at IdeaBlade.EntityModel.EntityManager.ExecuteQuery[T](IEntityQuery`1 query)
at IdeaBlade.EntityModel.EntityQuery`1.GetEnumerator()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at IDATT.Web.Services.MobileService.GetTripData(DateTime lastSyncOn) in C:\CodeWorkspace\idatt\Code\ServerSide\IDATT.Web.Services\Rest\MobileService.cs:line 457
at IDATT.Web.Services.MobileService.GetUserTrips(String userName) in C:\CodeWorkspace\idatt\Code\ServerSide\IDATT.Web.Services\Rest\MobileService.cs:line 231
at IdeaBlade.EntityModel.EntityServerProxy.CheckConnection(Exception e)
at IdeaBlade.EntityModel.EntityServerProxy.ExecFunc[T](Func`1 func, Boolean funcWillHandleException)
at IdeaBlade.EntityModel.EntityServerProxy.ExecuteOnServer[T](Func`1 func, Boolean funcWillHandleException)
at IdeaBlade.EntityModel.EntityManager.ExecuteServerQuery(IEntityQuerySurrogate entityQuery)
Edited by katit - 12-Apr-2012 at 2:27pm