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System.ArgumentException: An item with the same key has already been added from ExpressionTreeOptimizationContext
See original GitHub issueArgumentException sometimes happens in a multithreading system
Exception message:
System.ArgumentException: An item with the same key has already been added.
Stack trace:
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at LinqToDB.Linq.Builder.ExpressionTreeOptimizationContext.IsServerSideOnly(Expression expr)
at LinqToDB.Linq.Builder.ExpressionTreeOptimizationContext.CanBeCompiledFind(CanBeCompiledContext context, Expression ex)
at LinqToDB.Expressions.FindVisitor`1.Find(Expression expr)
at LinqToDB.Linq.Builder.ExpressionTreeOptimizationContext.CanBeCompiled(Expression expr)
at LinqToDB.Linq.Builder.ExpressionBuilder.RegisterParameter(Expression expression)
at LinqToDB.Linq.Builder.EagerLoading.<>c.<PrepareParameters>b__41_0(ValueTuple`4 context, Expression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(LambdaExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(UnaryExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Expressions.TransformVisitor`1.Transform[T](IList`1 source)
at LinqToDB.Expressions.TransformVisitor`1.TransformX(MethodCallExpression e)
at LinqToDB.Expressions.TransformVisitor`1.Transform(Expression expr)
at LinqToDB.Linq.Builder.EagerLoading.PrepareParameters(Expression expr, ExpressionBuilder builder, ParameterContainer& container, Expression& correctedExpression)
at LinqToDB.Linq.Builder.EagerLoading.<>c__DisplayClass43_0`2.<<RegisterPreambles>b__1>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at LinqToDB.Linq.Builder.ExpressionBuilder.<>c__DisplayClass212_0`1.<<RegisterPreamble>b__1>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at LinqToDB.Linq.Query.<InitPreamblesAsync>d__34.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at LinqToDB.Linq.ExpressionQuery`1.<LinqToDB-Async-IQueryProviderAsync-ExecuteAsync>d__15`1.MoveNext()
Steps to reproduce
Nothing special. The problem that simple Dictionary was used for caching
Dictionary<Expression, bool> _isServerSideOnlyCache = new ();
Possible solutions: Replace Dictionary<Expression, bool> with ConcurrentDictionary<Expression, bool> or use Set instead of Add in 361 line
_isServerSideOnlyCache[expr] = result;
Environment details
linq2db version: 3.4.3 Database Server: Azure ms sql Database Provider: SqlServer Operating system: Windows .NET Framework: 4.8
Issue Analytics
- State:
- Created 2 years ago
- Comments:5 (3 by maintainers)
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Well, I need to check. Suspicious place is found.
I’ve checked the whole stack trace, and there are no forgotten awaits We saw such exceptions in different places, usually after starting the application.