xUnit InMemoryDatabase Test failure: InvalidOperationException












2















I run Unit-Tests on TFS in a CI environment, today it failed with the following exception:



Error:
System.InvalidOperationException : Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct.
Stacktrace:
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.GetDisplayName(Type type)
at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.FindEntityType(Type type)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.RewriteEntityEquality(ExpressionType nodeType, Expression left, Expression right)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at System.Linq.Expressions.ExpressionVisitor.VisitBinary(BinaryExpression node)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at Remotion.Linq.Clauses.WhereClause.TransformExpressions(Func`2 transformation)
at Remotion.Linq.QueryModel.TransformExpressions(Func`2 transformation)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryOptimizer.Optimize(QueryCompilationContext queryCompilationContext, QueryModel queryModel)
at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.OptimizeQueryModel(QueryModel queryModel, Boolean asyncQuery)
at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.CreateQueryExecutor[TResult](QueryModel queryModel)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](Expression query, IQueryModelGenerator queryModelGenerator, IDatabase database, IDiagnosticsLogger`1 logger, Type contextType)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass13_0`1.<Execute>b__0()
at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
at System.Linq.Queryable.Any[TSource](IQueryable`1 source)
at ModelNamespace.SomeRepository.TestMethod()
at TestNamespace.SomeRepositoryTest.TestMethod_Test()


After that I started the same build on the same commit again and it succeeded. Odd isn't it?



How the Tests are built up



To set up InMemoryDatabases, we use the following helper Class:



public class DbContextTestHelper
{
public static DbContextOptions<CustomContext> PrepareData(Action<CustomContext> createData)
{
var options = CreateDbContextOptions();
SaveData(options, createData);
return options;
}

private static void SaveData(DbContextOptions<CustomContext> options, Action<CustomContext> createData)
{
// Insert seed data into the database using one instance of the context
using (var context = new CustomContext(options))
{
createData.Invoke(context);
context.SaveChanges();
}
}

private static DbContextOptions<CustomContext> CreateDbContextOptions()
{
return new DbContextOptionsBuilder<CustomContext>()
.UseInMemoryDatabase(Guid.NewGuid()
.ToString()) //Database with same name gets reused, so let's isolate the tests from each other...
.Options;
}
}


So now we have many Tests we build up like this:



public class SomeRepositoryTest
{
[Fact]
public async Task TestMethod_Test()
{
var options = DbContextTestHelper.PrepareData(context =>
{
// do some initialisation
});
// Use a clean instance of the context to run the test
using (var context = new CustomContext(options))
{
var testee = new SomeRepository(context);
await testee.TestMethod(); // InvalidOperationException from above
// Assert something
}
}
}


Of course there are many cases where we create those DbContextOptions<CustomContext> and naturally they run parallel because of the built-in functionality that xUnit provides (yes of course not in the same class but for many test classes).



My Question



As far as I can tell there are few possibilities of why this can sometimes cause an exception:




  • the GUID's generated to ensure different instances of InMemoryDatabases are duplicates. However I'd rather not believe this.

  • there is a bug in the InMememory Database System

  • We are using InMemoryDatabases wrong


Do you know what's going on?



Edit 1:



As Requested, here's the TestMethod() where System.Linq.Queryable.Any[TSource](IQueryable'1 source) gets called.



    public void TestMethod(SomeObject someObject, List<DateTime> dates, bool someOption)
{
var res = _dbContext.SomeSet.Where(o =>
o.SomeObject.Equals(someObject) && dates.Contains(o.DateTime) && o.SomeOption == someOption);
if (res.Any()) // at System.Linq.Queryable.Any[TSource](IQueryable`1 source)
{
_dbContext.SomeSet.RemoveRange(res);
}
}









share|improve this question

























  • This appears to be an issue in EntityFrameworkCore github.com/IdentityServer/IdentityServer4/issues/2453. One suggested fix is to use ConcurrentDictionary

    – obl
    Nov 12 '18 at 16:14













  • @obl the point is, that im not at all accessing any dictionary. I only have an InMemoryDB and a DbContext. There are only DbSet<T> which I access. So im not really able to change this behavior.

    – LuckyLikey
    Nov 13 '18 at 6:03











  • Gotcha. Can you find the System.Linq.Queryable.Any[TSource](IQueryable`1 source) query mentioned in the stack trace and post it?

    – obl
    Nov 13 '18 at 16:48













  • @obl added it. hope it helps

    – LuckyLikey
    Nov 14 '18 at 6:09
















2















I run Unit-Tests on TFS in a CI environment, today it failed with the following exception:



Error:
System.InvalidOperationException : Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct.
Stacktrace:
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.GetDisplayName(Type type)
at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.FindEntityType(Type type)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.RewriteEntityEquality(ExpressionType nodeType, Expression left, Expression right)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at System.Linq.Expressions.ExpressionVisitor.VisitBinary(BinaryExpression node)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at Remotion.Linq.Clauses.WhereClause.TransformExpressions(Func`2 transformation)
at Remotion.Linq.QueryModel.TransformExpressions(Func`2 transformation)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryOptimizer.Optimize(QueryCompilationContext queryCompilationContext, QueryModel queryModel)
at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.OptimizeQueryModel(QueryModel queryModel, Boolean asyncQuery)
at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.CreateQueryExecutor[TResult](QueryModel queryModel)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](Expression query, IQueryModelGenerator queryModelGenerator, IDatabase database, IDiagnosticsLogger`1 logger, Type contextType)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass13_0`1.<Execute>b__0()
at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
at System.Linq.Queryable.Any[TSource](IQueryable`1 source)
at ModelNamespace.SomeRepository.TestMethod()
at TestNamespace.SomeRepositoryTest.TestMethod_Test()


After that I started the same build on the same commit again and it succeeded. Odd isn't it?



How the Tests are built up



To set up InMemoryDatabases, we use the following helper Class:



public class DbContextTestHelper
{
public static DbContextOptions<CustomContext> PrepareData(Action<CustomContext> createData)
{
var options = CreateDbContextOptions();
SaveData(options, createData);
return options;
}

private static void SaveData(DbContextOptions<CustomContext> options, Action<CustomContext> createData)
{
// Insert seed data into the database using one instance of the context
using (var context = new CustomContext(options))
{
createData.Invoke(context);
context.SaveChanges();
}
}

private static DbContextOptions<CustomContext> CreateDbContextOptions()
{
return new DbContextOptionsBuilder<CustomContext>()
.UseInMemoryDatabase(Guid.NewGuid()
.ToString()) //Database with same name gets reused, so let's isolate the tests from each other...
.Options;
}
}


So now we have many Tests we build up like this:



public class SomeRepositoryTest
{
[Fact]
public async Task TestMethod_Test()
{
var options = DbContextTestHelper.PrepareData(context =>
{
// do some initialisation
});
// Use a clean instance of the context to run the test
using (var context = new CustomContext(options))
{
var testee = new SomeRepository(context);
await testee.TestMethod(); // InvalidOperationException from above
// Assert something
}
}
}


Of course there are many cases where we create those DbContextOptions<CustomContext> and naturally they run parallel because of the built-in functionality that xUnit provides (yes of course not in the same class but for many test classes).



My Question



As far as I can tell there are few possibilities of why this can sometimes cause an exception:




  • the GUID's generated to ensure different instances of InMemoryDatabases are duplicates. However I'd rather not believe this.

  • there is a bug in the InMememory Database System

  • We are using InMemoryDatabases wrong


Do you know what's going on?



Edit 1:



As Requested, here's the TestMethod() where System.Linq.Queryable.Any[TSource](IQueryable'1 source) gets called.



    public void TestMethod(SomeObject someObject, List<DateTime> dates, bool someOption)
{
var res = _dbContext.SomeSet.Where(o =>
o.SomeObject.Equals(someObject) && dates.Contains(o.DateTime) && o.SomeOption == someOption);
if (res.Any()) // at System.Linq.Queryable.Any[TSource](IQueryable`1 source)
{
_dbContext.SomeSet.RemoveRange(res);
}
}









share|improve this question

























  • This appears to be an issue in EntityFrameworkCore github.com/IdentityServer/IdentityServer4/issues/2453. One suggested fix is to use ConcurrentDictionary

    – obl
    Nov 12 '18 at 16:14













  • @obl the point is, that im not at all accessing any dictionary. I only have an InMemoryDB and a DbContext. There are only DbSet<T> which I access. So im not really able to change this behavior.

    – LuckyLikey
    Nov 13 '18 at 6:03











  • Gotcha. Can you find the System.Linq.Queryable.Any[TSource](IQueryable`1 source) query mentioned in the stack trace and post it?

    – obl
    Nov 13 '18 at 16:48













  • @obl added it. hope it helps

    – LuckyLikey
    Nov 14 '18 at 6:09














2












2








2


1






I run Unit-Tests on TFS in a CI environment, today it failed with the following exception:



Error:
System.InvalidOperationException : Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct.
Stacktrace:
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.GetDisplayName(Type type)
at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.FindEntityType(Type type)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.RewriteEntityEquality(ExpressionType nodeType, Expression left, Expression right)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at System.Linq.Expressions.ExpressionVisitor.VisitBinary(BinaryExpression node)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at Remotion.Linq.Clauses.WhereClause.TransformExpressions(Func`2 transformation)
at Remotion.Linq.QueryModel.TransformExpressions(Func`2 transformation)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryOptimizer.Optimize(QueryCompilationContext queryCompilationContext, QueryModel queryModel)
at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.OptimizeQueryModel(QueryModel queryModel, Boolean asyncQuery)
at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.CreateQueryExecutor[TResult](QueryModel queryModel)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](Expression query, IQueryModelGenerator queryModelGenerator, IDatabase database, IDiagnosticsLogger`1 logger, Type contextType)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass13_0`1.<Execute>b__0()
at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
at System.Linq.Queryable.Any[TSource](IQueryable`1 source)
at ModelNamespace.SomeRepository.TestMethod()
at TestNamespace.SomeRepositoryTest.TestMethod_Test()


After that I started the same build on the same commit again and it succeeded. Odd isn't it?



How the Tests are built up



To set up InMemoryDatabases, we use the following helper Class:



public class DbContextTestHelper
{
public static DbContextOptions<CustomContext> PrepareData(Action<CustomContext> createData)
{
var options = CreateDbContextOptions();
SaveData(options, createData);
return options;
}

private static void SaveData(DbContextOptions<CustomContext> options, Action<CustomContext> createData)
{
// Insert seed data into the database using one instance of the context
using (var context = new CustomContext(options))
{
createData.Invoke(context);
context.SaveChanges();
}
}

private static DbContextOptions<CustomContext> CreateDbContextOptions()
{
return new DbContextOptionsBuilder<CustomContext>()
.UseInMemoryDatabase(Guid.NewGuid()
.ToString()) //Database with same name gets reused, so let's isolate the tests from each other...
.Options;
}
}


So now we have many Tests we build up like this:



public class SomeRepositoryTest
{
[Fact]
public async Task TestMethod_Test()
{
var options = DbContextTestHelper.PrepareData(context =>
{
// do some initialisation
});
// Use a clean instance of the context to run the test
using (var context = new CustomContext(options))
{
var testee = new SomeRepository(context);
await testee.TestMethod(); // InvalidOperationException from above
// Assert something
}
}
}


Of course there are many cases where we create those DbContextOptions<CustomContext> and naturally they run parallel because of the built-in functionality that xUnit provides (yes of course not in the same class but for many test classes).



My Question



As far as I can tell there are few possibilities of why this can sometimes cause an exception:




  • the GUID's generated to ensure different instances of InMemoryDatabases are duplicates. However I'd rather not believe this.

  • there is a bug in the InMememory Database System

  • We are using InMemoryDatabases wrong


Do you know what's going on?



Edit 1:



As Requested, here's the TestMethod() where System.Linq.Queryable.Any[TSource](IQueryable'1 source) gets called.



    public void TestMethod(SomeObject someObject, List<DateTime> dates, bool someOption)
{
var res = _dbContext.SomeSet.Where(o =>
o.SomeObject.Equals(someObject) && dates.Contains(o.DateTime) && o.SomeOption == someOption);
if (res.Any()) // at System.Linq.Queryable.Any[TSource](IQueryable`1 source)
{
_dbContext.SomeSet.RemoveRange(res);
}
}









share|improve this question
















I run Unit-Tests on TFS in a CI environment, today it failed with the following exception:



Error:
System.InvalidOperationException : Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct.
Stacktrace:
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.GetDisplayName(Type type)
at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.FindEntityType(Type type)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.RewriteEntityEquality(ExpressionType nodeType, Expression left, Expression right)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at System.Linq.Expressions.ExpressionVisitor.VisitBinary(BinaryExpression node)
at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.EntityEqualityRewritingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at Remotion.Linq.Clauses.WhereClause.TransformExpressions(Func`2 transformation)
at Remotion.Linq.QueryModel.TransformExpressions(Func`2 transformation)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryOptimizer.Optimize(QueryCompilationContext queryCompilationContext, QueryModel queryModel)
at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.OptimizeQueryModel(QueryModel queryModel, Boolean asyncQuery)
at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.CreateQueryExecutor[TResult](QueryModel queryModel)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](Expression query, IQueryModelGenerator queryModelGenerator, IDatabase database, IDiagnosticsLogger`1 logger, Type contextType)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass13_0`1.<Execute>b__0()
at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
at System.Linq.Queryable.Any[TSource](IQueryable`1 source)
at ModelNamespace.SomeRepository.TestMethod()
at TestNamespace.SomeRepositoryTest.TestMethod_Test()


After that I started the same build on the same commit again and it succeeded. Odd isn't it?



How the Tests are built up



To set up InMemoryDatabases, we use the following helper Class:



public class DbContextTestHelper
{
public static DbContextOptions<CustomContext> PrepareData(Action<CustomContext> createData)
{
var options = CreateDbContextOptions();
SaveData(options, createData);
return options;
}

private static void SaveData(DbContextOptions<CustomContext> options, Action<CustomContext> createData)
{
// Insert seed data into the database using one instance of the context
using (var context = new CustomContext(options))
{
createData.Invoke(context);
context.SaveChanges();
}
}

private static DbContextOptions<CustomContext> CreateDbContextOptions()
{
return new DbContextOptionsBuilder<CustomContext>()
.UseInMemoryDatabase(Guid.NewGuid()
.ToString()) //Database with same name gets reused, so let's isolate the tests from each other...
.Options;
}
}


So now we have many Tests we build up like this:



public class SomeRepositoryTest
{
[Fact]
public async Task TestMethod_Test()
{
var options = DbContextTestHelper.PrepareData(context =>
{
// do some initialisation
});
// Use a clean instance of the context to run the test
using (var context = new CustomContext(options))
{
var testee = new SomeRepository(context);
await testee.TestMethod(); // InvalidOperationException from above
// Assert something
}
}
}


Of course there are many cases where we create those DbContextOptions<CustomContext> and naturally they run parallel because of the built-in functionality that xUnit provides (yes of course not in the same class but for many test classes).



My Question



As far as I can tell there are few possibilities of why this can sometimes cause an exception:




  • the GUID's generated to ensure different instances of InMemoryDatabases are duplicates. However I'd rather not believe this.

  • there is a bug in the InMememory Database System

  • We are using InMemoryDatabases wrong


Do you know what's going on?



Edit 1:



As Requested, here's the TestMethod() where System.Linq.Queryable.Any[TSource](IQueryable'1 source) gets called.



    public void TestMethod(SomeObject someObject, List<DateTime> dates, bool someOption)
{
var res = _dbContext.SomeSet.Where(o =>
o.SomeObject.Equals(someObject) && dates.Contains(o.DateTime) && o.SomeOption == someOption);
if (res.Any()) // at System.Linq.Queryable.Any[TSource](IQueryable`1 source)
{
_dbContext.SomeSet.RemoveRange(res);
}
}






c# xunit in-memory-database ef-core-2.1 .net-core-2.1






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 14 '18 at 6:05







LuckyLikey

















asked Nov 12 '18 at 15:02









LuckyLikeyLuckyLikey

1,2911131




1,2911131













  • This appears to be an issue in EntityFrameworkCore github.com/IdentityServer/IdentityServer4/issues/2453. One suggested fix is to use ConcurrentDictionary

    – obl
    Nov 12 '18 at 16:14













  • @obl the point is, that im not at all accessing any dictionary. I only have an InMemoryDB and a DbContext. There are only DbSet<T> which I access. So im not really able to change this behavior.

    – LuckyLikey
    Nov 13 '18 at 6:03











  • Gotcha. Can you find the System.Linq.Queryable.Any[TSource](IQueryable`1 source) query mentioned in the stack trace and post it?

    – obl
    Nov 13 '18 at 16:48













  • @obl added it. hope it helps

    – LuckyLikey
    Nov 14 '18 at 6:09



















  • This appears to be an issue in EntityFrameworkCore github.com/IdentityServer/IdentityServer4/issues/2453. One suggested fix is to use ConcurrentDictionary

    – obl
    Nov 12 '18 at 16:14













  • @obl the point is, that im not at all accessing any dictionary. I only have an InMemoryDB and a DbContext. There are only DbSet<T> which I access. So im not really able to change this behavior.

    – LuckyLikey
    Nov 13 '18 at 6:03











  • Gotcha. Can you find the System.Linq.Queryable.Any[TSource](IQueryable`1 source) query mentioned in the stack trace and post it?

    – obl
    Nov 13 '18 at 16:48













  • @obl added it. hope it helps

    – LuckyLikey
    Nov 14 '18 at 6:09

















This appears to be an issue in EntityFrameworkCore github.com/IdentityServer/IdentityServer4/issues/2453. One suggested fix is to use ConcurrentDictionary

– obl
Nov 12 '18 at 16:14







This appears to be an issue in EntityFrameworkCore github.com/IdentityServer/IdentityServer4/issues/2453. One suggested fix is to use ConcurrentDictionary

– obl
Nov 12 '18 at 16:14















@obl the point is, that im not at all accessing any dictionary. I only have an InMemoryDB and a DbContext. There are only DbSet<T> which I access. So im not really able to change this behavior.

– LuckyLikey
Nov 13 '18 at 6:03





@obl the point is, that im not at all accessing any dictionary. I only have an InMemoryDB and a DbContext. There are only DbSet<T> which I access. So im not really able to change this behavior.

– LuckyLikey
Nov 13 '18 at 6:03













Gotcha. Can you find the System.Linq.Queryable.Any[TSource](IQueryable`1 source) query mentioned in the stack trace and post it?

– obl
Nov 13 '18 at 16:48







Gotcha. Can you find the System.Linq.Queryable.Any[TSource](IQueryable`1 source) query mentioned in the stack trace and post it?

– obl
Nov 13 '18 at 16:48















@obl added it. hope it helps

– LuckyLikey
Nov 14 '18 at 6:09





@obl added it. hope it helps

– LuckyLikey
Nov 14 '18 at 6:09












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