Dependency injection fails for oop-host when using a .NET Isolated payload with the worker.sdk package version 1.3.0 or earlier.

[kshyju]

When using a .NET Isolated payload with Microsoft.Azure.Functions.Worker.sdk version 1.3.0 or below, host will fail with the following exception.

System.InvalidOperationException: 'Unable to resolve service for type 'System.String' while attempting to activate 'Microsoft.Azure.WebJobs.Extensions.FunctionMetadataLoader.JsonFunctionProvider'.'

Stack trace

at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateArgumentCallSites(ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateConstructorCallSite(ResultCache lifetime, ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceDescriptor descriptor, ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain, Int32 slot)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateEnumerable(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.GetCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(ServiceIdentifier serviceIdentifier)
at System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func2 valueFactory)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(ServiceIdentifier serviceIdentifier, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
at Microsoft.Azure.WebJobs.Script.WebHost.WebJobsScriptHostService.GetService(Type serviceType) in D:\src\azure-functions-host\src\WebJobs.Script.WebHost\WebJobsScriptHostService.cs:line 962

• The issue does not happen for version 1.5.0-preview1 or above.
• Issue happens only on dev branch which uses .NET DI framework.
• No issues with in-proc branch which uses DryIOC.

JsonFunctionProvider constructor was changed between the working and non-working version.

1.30.0

1.5.0-preview1

We believe DryIOC handles this by passing null/empty string value while .NET DI framework fails. We need to fix the oop host branch to handle this service resolution.