Extensions.json not generated when using Microsoft.Azure.WebJobs.Script.ExtensionsMetadataGenerator 1.1.4

Taking @jeffhollan’s words into action, this is the main issue I’ve seen not only on my personal projects, but elsewhere too.

Error while running the functions via Visual Studio:

Microsoft.Extensions.DependencyInjection.Abstractions: Unable to resolve service for type

Error while deployed on a brand new Function v3 app in Azure:

System.InvalidOperationException: Unable to resolve service for type 'Project.Hidden.Domain.Interfaces.Service.IAzureStorageService' while attempting to activate 'Project.Hidden.Serverless.Importacion.VerificarFunction'.
   at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy, Boolean isDefaultParameterRequired)
   at lambda_method(Closure , IServiceProvider , Object[] )
   at Microsoft.Azure.WebJobs.Host.Executors.DefaultJobActivator.CreateInstance[T](IServiceProvider serviceProvider) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\DefaultJobActivator.cs:line 37
   at Microsoft.Azure.WebJobs.Host.Executors.DefaultJobActivator.CreateInstance[T](IFunctionInstanceEx functionInstance) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\DefaultJobActivator.cs:line 32
   at Microsoft.Azure.WebJobs.Host.Executors.ActivatorInstanceFactory`1.<>c__DisplayClass1_1.<.ctor>b__0(IFunctionInstanceEx i) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\ActivatorInstanceFactory.cs:line 20
   at Microsoft.Azure.WebJobs.Host.Executors.ActivatorInstanceFactory`1.Create(IFunctionInstanceEx functionInstance) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\ActivatorInstanceFactory.cs:line 26
   at Microsoft.Azure.WebJobs.Host.Executors.FunctionInvoker`2.CreateInstance(IFunctionInstanceEx functionInstance) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionInvoker.cs:line 44
   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ParameterHelper.Initialize() in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 846
   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.TryExecuteAsyncCore(IFunctionInstanceEx functionInstance, CancellationToken cancellationToken) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 116

Only working when…

If I run the project from the cli with func start --build, all the functions work, but it logs the following errors on the console for each function:

[2020-02-18 12:30:49 AM] Error indexing method 'ImportarcionVerificarFunction'
[2020-02-18 12:30:49 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'ImportarcionVerificarFunction'. System.Private.CoreLib: Could not load file or assembly 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified. System.Private.CoreLib: Could not load the specified file.
[2020-02-18 12:30:49 AM] Function 'ImportarcionVerificarFunction' failed indexing and will be disabled.
..
..
[2020-02-18 12:30:49 AM] The 'ImportarcionFinalizarFunction' function is in error: Unable to load one or more of the requested types.
[2020-02-18 12:30:49 AM] Could not load file or assembly 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.

My system setup and configurations

Everything worked fine until I migrated to .NET Core 3

 - Visual Studio 16.5.0 Preview 2
 - azure-functions-core-tools@3.0.2106
 - npm@v13.2.0

global.json

{
  "sdk": {
    "version": "3.1.101"
  }
}

.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <AzureFunctionsVersion>v3</AzureFunctionsVersion>
    <LangVersion>latest</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.0.0" />
    <PackageReference Include="Microsoft.Extensions.Http" Version="3.1.1" />
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="3.0.3" />
    <PackageReference Include="Utf8Json" Version="1.3.7" />
  </ItemGroup>
  <ItemGroup>
    <ProjectReference Include="..\Project.Hidden.Data\Project.Hidden.Data.csproj" />
    <ProjectReference Include="..\Project.Hidden.Domain\Project.Hidden.Domain.csproj" />
    <ProjectReference Include="..\Project.Hidden.Services\Project.Hidden.Services.csproj" />
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
</Project>

Startup.cs

using Microsoft.Azure.Functions.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;
using Project.Hidden.Data;
using Project.Hidden.Domain.Interfaces.Repository;

[assembly: FunctionsStartup(typeof(Project.Hidden.Functions.Startup))]

namespace Project.Hidden.Functions
{
    public class Startup : FunctionsStartup
    {
        public override void Configure(IFunctionsHostBuilder builder)
        {
            builder.Services.AddSingleton<IAzureStorageService, AzureStorageService>();
        }
    }
}

local.settings.json

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
    "FUNCTIONS_EXTENSION_VERSION": "~3"
  }
}

host.json

{
  "version": "2.0",
  "healthMonitor": {
    "enabled": true,
    "healthCheckInterval": "00:00:10",
    "healthCheckWindow": "00:02:00",
    "healthCheckThreshold": 6,
    "counterThreshold": 0.80
  },
  "functionTimeout": "00:10:00"
}

[brettsam]

I’ve just pushed new versions of Microsoft.Net.Sdk.Functions to nuget. Versions 1.0.34 (for v1 and v2) and 3.0.5 (for v3) should be indexed and available shortly.

Please give those a try and let us know if you run into issues with generated extensions.json (or DI or bindings) with this package.

[eliashdezr]

@brettsam thanks for the quick responses and effort put on resolve this quickly!

I can confirm that all the issues related with the dependency injection have been resolved, locally and deployed using the version 3.0.5 of the Microsoft.NET.Sdk.Functions package.

Thanks again and @jeffhollan too for jumping on this also.