AspNetCore 3.0 Exception: "Cache entry must specify a value for Size when SizeLimit is set."

Is AspNetCore 3.0 supported? I’m getting this exception on page load. Is this a bug or config error? It worked previously.

Packages:

MiniProfiler.AspNetCore.Mvc ------- 4.1.0 MiniProfiler.EntityFrameworkCore – 4.1.0

Services Call:

services.AddMiniProfiler().AddEntityFramework();

Configure Call:

app.UseMiniProfiler();

StackTrace:

System.InvalidOperationException: Cache entry must specify a value for Size when SizeLimit is set. Module “Microsoft.Extensions.Caching.Memory.MemoryCache”, in SetEntry Module “Microsoft.Extensions.Caching.Memory.CacheEntry”, in Dispose Module “Microsoft.Extensions.Caching.Memory.CacheExtensions”, in Set File “C:\projects\dotnet\src\MiniProfiler.AspNetCore\Storage\MemoryCacheStorage.cs”, line 160, col 13, in Save File “C:\projects\dotnet\src\MiniProfiler.AspNetCore\Storage\MemoryCacheStorage.cs”, line 195, col 13, in SaveAsync File “C:\projects\dotnet\src\MiniProfiler.Shared\ProfileProviders\DefaultProfilerProvider.cs”, line 112, col 13, in SaveAsync Module “System.Runtime.ExceptionServices.ExceptionDispatchInfo”, in Throw Module “System.Runtime.CompilerServices.TaskAwaiter”, in ThrowForNonSuccess Module “System.Runtime.CompilerServices.TaskAwaiter”, in HandleNonSuccessAndDebuggerNotification Module “System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter”, in GetResult File “C:\projects\dotnet\src\MiniProfiler.Shared\ProfileProviders\DefaultProfilerProvider.cs”, line 78, col 13, in StoppedAsync Module “System.Runtime.ExceptionServices.ExceptionDispatchInfo”, in Throw Module “System.Runtime.CompilerServices.TaskAwaiter”, in ThrowForNonSuccess Module “System.Runtime.CompilerServices.TaskAwaiter”, in HandleNonSuccessAndDebuggerNotification Module “System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter”, in GetResult File “C:\projects\dotnet\src\MiniProfiler.Shared\MiniProfiler.cs”, line 243, col 13, in StopAsync Module “System.Runtime.ExceptionServices.ExceptionDispatchInfo”, in Throw Module “System.Runtime.CompilerServices.TaskAwaiter”, in ThrowForNonSuccess Module “System.Runtime.CompilerServices.TaskAwaiter”, in HandleNonSuccessAndDebuggerNotification Module “System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter”, in GetResult File “C:\projects\dotnet\src\MiniProfiler.AspNetCore\MiniProfilerMiddleware.cs”, line 112, col 17, in Invoke Module “System.Runtime.ExceptionServices.ExceptionDispatchInfo”, in Throw Module “System.Runtime.CompilerServices.TaskAwaiter”, in ThrowForNonSuccess Module “System.Runtime.CompilerServices.TaskAwaiter”, in HandleNonSuccessAndDebuggerNotification Module “System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter”, in GetResult

[Cooksauce]

@NickCraver

Looks like EF Core is setting up the SizeLimit on line 258: https://github.com/aspnet/EntityFrameworkCore/blob/release/3.0/src/EFCore/Infrastructure/EntityFrameworkServicesBuilder.cs

TryAdd<IMemoryCache>(p => new MemoryCache(new MemoryCacheOptions { SizeLimit = 10240 }));

Work-Around: I was able to get it working by setting up the IMemoryCache manually before the EF Core registration:

services.AddMemoryCache();

services
     .AddEntityFrameworkNpgsql()
     .AddDbContext<MyDbContext>(
          options => options
               .UseNpgsql(connectionString, o => o.SetPostgresVersion(9, 6))
               .UseLazyLoadingProxies(),
          ServiceLifetime.Transient,
          ServiceLifetime.Transient);

services.AddMiniProfiler().AddEntityFramework();

Permanent Solution: Do you have any suggestions on getting MiniProfiler to play nice with a MemoryCache that has the MemoryCache.SizeLimit set?

[roji]

@ajcvickers done, https://www.npgsql.org/efcore/api/Microsoft.Extensions.DependencyInjection.NpgsqlServiceCollectionExtensions.html.