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Multithreading problem: Association key 'A_Id' not found for type 'B

See original GitHub issue

I have many of threads. Each thread creates DataConnection object. Sometimes (very rarely) i get following exception:

Association key ‘A_Id’ not found for type 'B

linq2db.dll!LinqToDB.Linq.Builder.TableBuilder.AssociatedTableContext.AssociatedTableContext(LinqToDB.Linq.Builder.ExpressionBuilder builder, LinqToDB.Linq.Builder.TableBuilder.TableContext parent, LinqToDB.Mapping.AssociationDescriptor association) Line 1312	C#
	linq2db.dll!LinqToDB.Linq.Builder.TableBuilder.TableContext.GetAssociation.AnonymousMethod__b6(LinqToDB.Mapping.AssociationDescriptor a) Line 1230	C#
	System.Core.dll!System.Linq.Enumerable.WhereSelectEnumerableIterator<LinqToDB.Mapping.AssociationDescriptor,LinqToDB.Linq.Builder.TableBuilder.AssociatedTableContext>.MoveNext()	Unknown
	System.Core.dll!System.Linq.Enumerable.FirstOrDefault<LinqToDB.Linq.Builder.TableBuilder.AssociatedTableContext>(System.Collections.Generic.IEnumerable<LinqToDB.Linq.Builder.TableBuilder.AssociatedTableContext> source)	Unknown
	linq2db.dll!LinqToDB.Linq.Builder.TableBuilder.TableContext.GetAssociation(System.Linq.Expressions.Expression expression, int level) Line 1232	C#
	linq2db.dll!LinqToDB.Linq.Builder.TableBuilder.TableContext.FindTable(System.Linq.Expressions.Expression expression, int level, bool throwException) Line 1197	C#
	linq2db.dll!LinqToDB.Linq.Builder.TableBuilder.TableContext.IsExpression(System.Linq.Expressions.Expression expression, int level, LinqToDB.Linq.Builder.RequestFor requestFor) Line 757	C#
	linq2db.dll!LinqToDB.Linq.Builder.SelectContext.IsExpressionInternal.AnonymousMethod__48(LinqToDB.Linq.Builder.IBuildContext ctx, System.Linq.Expressions.Expression ex, int l) Line 650	C#
	linq2db.dll!LinqToDB.Linq.Builder.SelectContext.ProcessScalar<LinqToDB.Linq.Builder.IsExpressionResult>(System.Linq.Expressions.Expression expression, int level, System.Func<LinqToDB.Linq.Builder.IBuildContext,System.Linq.Expressions.Expression,int,LinqToDB.Linq.Builder.IsExpressionResult> action, System.Func<LinqToDB.Linq.Builder.IsExpressionResult> defaultAction) Line 885	C#
	linq2db.dll!LinqToDB.Linq.Builder.SelectContext.IsExpressionInternal(System.Linq.Expressions.Expression expression, int level, LinqToDB.Linq.Builder.RequestFor requestFlag) Line 647	C#
	linq2db.dll!LinqToDB.Linq.Builder.SelectContext.IsExpression(System.Linq.Expressions.Expression expression, int level, LinqToDB.Linq.Builder.RequestFor requestFlag) Line 610	C#
	linq2db.dll!LinqToDB.Linq.Builder.ExpressionBuilder.ConvertExpressions(LinqToDB.Linq.Builder.IBuildContext context, System.Linq.Expressions.Expression expression, LinqToDB.Linq.Builder.ConvertFlags queryConvertFlag) Line 615	C#
	linq2db.dll!LinqToDB.Linq.Builder.SelectContext.ConvertToSql(System.Linq.Expressions.Expression expression, int level, LinqToDB.Linq.Builder.ConvertFlags flags) Line 259	C#
	linq2db.dll!LinqToDB.Linq.Builder.SelectContext.ConvertToIndexInternal(System.Linq.Expressions.Expression expression, int level, LinqToDB.Linq.Builder.ConvertFlags flags) Line 462	C#
	linq2db.dll!LinqToDB.Linq.Builder.SelectContext.ConvertToIndex(System.Linq.Expressions.Expression expression, int level, LinqToDB.Linq.Builder.ConvertFlags flags) Line 413	C#
	linq2db.dll!LinqToDB.Linq.Builder.DistinctBuilder.BuildMethodCall(LinqToDB.Linq.Builder.ExpressionBuilder builder, System.Linq.Expressions.MethodCallExpression methodCall, LinqToDB.Linq.Builder.BuildInfo buildInfo) Line 24	C#
	linq2db.dll!LinqToDB.Linq.Builder.MethodCallBuilder.BuildSequence(LinqToDB.Linq.Builder.ExpressionBuilder builder, LinqToDB.Linq.Builder.BuildInfo buildInfo) Line 22	C#
	linq2db.dll!LinqToDB.Linq.Builder.ExpressionBuilder.BuildSequence(LinqToDB.Linq.Builder.BuildInfo buildInfo) Line 177	C#
	linq2db.dll!LinqToDB.Linq.Builder.ConcatUnionBuilder.BuildMethodCall(LinqToDB.Linq.Builder.ExpressionBuilder builder, System.Linq.Expressions.MethodCallExpression methodCall, LinqToDB.Linq.Builder.BuildInfo buildInfo) Line 25	C#
	linq2db.dll!LinqToDB.Linq.Builder.MethodCallBuilder.BuildSequence(LinqToDB.Linq.Builder.ExpressionBuilder builder, LinqToDB.Linq.Builder.BuildInfo buildInfo) Line 22	C#
	linq2db.dll!LinqToDB.Linq.Builder.ExpressionBuilder.BuildSequence(LinqToDB.Linq.Builder.BuildInfo buildInfo) Line 177	C#
	linq2db.dll!LinqToDB.Linq.Builder.ExpressionBuilder.Build<Telda.AP.Model.Entities.Citizen>() Line 148	C#
	linq2db.dll!LinqToDB.Linq.Query<Telda.AP.Model.Entities.Citizen>.GetQuery(LinqToDB.Linq.IDataContextInfo dataContextInfo, System.Linq.Expressions.Expression expr) Line 152	C#
	linq2db.dll!LinqToDB.Linq.ExpressionQuery<Telda.AP.Model.Entities.Citizen>.GetQuery(System.Linq.Expressions.Expression expression, bool cache) Line 84	C#
	linq2db.dll!LinqToDB.Linq.ExpressionQuery<Telda.AP.Model.Entities.Citizen>.Execute(LinqToDB.Linq.IDataContextInfo dataContextInfo, System.Linq.Expressions.Expression expression) Line 76	C#
	linq2db.dll!LinqToDB.Linq.ExpressionQuery<Telda.AP.Model.Entities.Citizen>.System.Collections.Generic.IEnumerable<T>.GetEnumerator() Line 156	C#
	System.Core.dll!System.Linq.Buffer<Telda.AP.Model.Entities.Citizen>.Buffer(System.Collections.Generic.IEnumerable<Telda.AP.Model.Entities.Citizen> source)	Unknown
	System.Core.dll!System.Linq.Enumerable.ToArray<Telda.AP.Model.Entities.Citizen>(System.Collections.Generic.IEnumerable<Telda.AP.Model.Entities.Citizen> source)	Unknown
>	CallingMethod	C#

B really does not have association with key A_Id. But A_Id (and A property with asociation attribute) has class C, which is descendant of class B (C : B). In the CallingMethod (from stack trace):

dataConnection.GetTable<C>().Select(c => c.A).Distinct()

Association attributes are writen properly, as CallingMethod works fine usually.

Issue Analytics

State:
Created 7 years ago
Comments:7 (7 by maintainers)

Top GitHub Comments

1reaction

ilicommented, Dec 23, 2016

Super! Thanks a lot, it looks like i know where is the problem!

0reactions

ilicommented, Feb 4, 2017

Should be fixed now

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