Finding Missing Dependency on ArgumentNullException on InitializeServiceProvider

[BoasE]

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After some refactorings of an existing system I get the following exception I assume that i missed a reference to regsiter, but the exception doesn't tell me which type the expcetion is related to.

How can I find the type which is missing a instance and which instance it is?

System.ArgumentNullException: Value cannot be null. (Parameter 'instance') at Autofac.Core.Activators.ProvidedInstance.ProvidedInstanceActivator.GetType(Object instance) at Autofac.Core.Activators.ProvidedInstance.ProvidedInstanceActivator..ctor(Object instance) at Autofac.RegistrationExtensions.RegisterInstance[T](ContainerBuilder builder, T instance) at Autofac.Extensions.DependencyInjection.AutofacRegistration.Register(ContainerBuilder builder, IEnumerable1 descriptors, Object lifetimeScopeTagForSingletons) at Autofac.Extensions.DependencyInjection.AutofacRegistration.Populate(ContainerBuilder builder, IEnumerable1 descriptors, Object lifetimeScopeTagForSingletons) at Autofac.Extensions.DependencyInjection.AutofacRegistration.Populate(ContainerBuilder builder, IEnumerable1 descriptors) at Autofac.Extensions.DependencyInjection.AutofacServiceProviderFactory.CreateBuilder(IServiceCollection services) at Microsoft.Extensions.Hosting.Internal.ServiceFactoryAdapter1.CreateBuilder(IServiceCollection services) at Microsoft.Extensions.Hosting.HostBuilder.InitializeServiceProvider() at Microsoft.Extensions.Hosting.HostBuilder.Build()

[maliming]

hi

After some refactorings of an existing system I get the following exception

What changes have you made?

[mirceamt]

Had the same issue after updating the version of multiple other packages in my project. Updated Autofac to 8.2.0 too and it fixed the issue.

[quannguyen-smd-vault22]

I got same problem, but it required me to update whole abp to 8.2.0, not only abp.autofac package

[maliming]

hi @quannguyen-smd-vault22

How to reproduce?

[quannguyen-smd-vault22]

hi @quannguyen-smd-vault22

How to reproduce?

I'm don't have minimal project to re-procedure, but what I got is

• my initial project (long time ago) doesn't include all Tenant module (for all layers)
• I add all Tenant module back yesterday, when I start to run solution, it cause

System.ArgumentNullException: Value cannot be null. (Parameter 'instance')

Update Abp.Autofac to 8.2.0 will help the error more clear:

System.MissingMethodException: Method not found: 'System.Collections.Generic.List`1<System.Type> Volo.Abp.DependencyInjection.IOnServiceExposingContext.get_ExposedTypes()'.

so I decide to upgrade all other abp packages to 8.2.0, and the error disappear.

[maliming]

If you can share the minimal project, I can check it out.