Action cannot load Microsoft.Extensions.DependencyInjection.Abstraction

[dmlo]

I have a c# OpenWhisk Action:

using System;
using IHWhisk.Models;
using Newtonsoft.Json.Linq;

namespace IHWhisk
{
    public class Hello
    {
        public JObject Main(JObject args)
        {
            var handian = new Handian();

            string errorText = "";
            
            try
            {
                using var db = new IHDbContext();
                db.Handians.Add(handian);
                db.SaveChanges();
            }
            catch (Exception e)
            {
                errorText = e.Message;
            }

            var message = new JObject();
            message.Add("Content-Type", new JValue("application/json"));
            message.Add("body", new JValue($"<p>Error: {errorText}</p>"));
            return message;
        }
    }
}

which uses EF Core dependency injection to configure and access the database, like so:

using System;
using Microsoft.EntityFrameworkCore;
using IHWhisk.Models;

namespace IHWhisk
{
    public class IHDbContext : DbContext
    {
        public DbSet<Handian> Handians { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder builder)
        {
            var connectionString = "Server=#.#.#.#;Database=ih;Port=5432;User Id=postgres;Password=supersecretpassword";
            builder
                .UseNpgsql(connectionString, o
                    => o.EnableRetryOnFailure());
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder
                .HasPostgresExtension("uuid-ossp")
                .Entity<BaseEntity>(entity =>
                {
                    entity.HasIndex("Discriminator");
                    entity.Property(p => p.Uuid)
                        .HasDefaultValueSql("uuid_generate_v4()"); // All IH entities get a postgres Uuid4
                })
                .Entity<Handian>(entity => { entity.Property<DateTime>(p => p.Birthday).HasDefaultValueSql("now()"); });
        }
    }
}

which when run inside my OpenWhisk installation fails with the error:

Error: Could not load file or assembly 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=3.1.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. Could not find or load a specific file. (0x80131621)

I test this Action locally by invoking it from a clean console app like so:

namespace WhiskTester
{
    class Program
    {
        static void Main(string[] args)
        {
            var ihwhisk = new IHWhisk.Hello();
            var callArgs = new JObject();
            var result = ihwhisk.Main(callArgs);
            Console.WriteLine(result);
        }
    }
}

It works when tested locally... a new record is written to the database as expected.

Things I've tried to resolve the issue:

• Successfully performed a DB insert without EF Core, ruling out a DB misconfiguration or a problem with the NGPSQL drivers
• Replaced NGPSQL with Microsoft's SQLite driver and replicated the issue to further rule out a NGPSQL problem
• Verified that Microsoft.Extensions.DependencyInjection.Abstractions.dll v3.1.3 is in the zip file I am sending to OpenWhisk
• Downgraded Microsoft.EntityFrameworkCore, Microsoft.EntityFrameworkCore.Abstractions, Microsoft.EntityFrameworkCore.Design, Microsoft.EntityFrameworkCore.Tools and Npgsql.EntityFrameworkCore.PostgreSQL to version 3.1.2. The error message now references missing Microsoft.Extensions.DependencyInjection.Abstractions, Version=3.1.2.0

At this point I've reached the edge of my knowledge and would be grateful for any advice or guidance you could offer.

[kamyker]

How your .csproj looks like? Try maybe my fork: https://github.com/kamyker/openwhisk-dotnet-csharp

[shawnallen85]

@dmlo Is Microsoft.Extensions.DependencyInjection.Abstractions included in your published zip file? The dependencies need to be included there. Let me know, thanks!

[dmlo]

@shawnallen85 Microsoft.Extensions.DependencyInjection.Abstractions.dll v3.1.3 was in the zip file I was sending to OpenWhisk.

[dmlo]

@kamyker here is my csproj:

`<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
    <TargetFrameworks>netstandard2.1;netcoreapp3.1</TargetFrameworks>
</PropertyGroup>

<ItemGroup>
  <PackageReference Include="EFCore.NamingConventions" Version="1.1.0" />
  <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
  <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="2.2.4" />
  <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL.Design" Version="1.1.0" />
</ItemGroup>

<ItemGroup>
  <ProjectReference Include="..\ih-interface\ih-interface.csproj" />
</ItemGroup>

<ItemGroup>
    <None Include="config.json" CopyToPublishDirectory="Always" />
    <None Update="female-names.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="last-names.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="male-names.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="places.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
</ItemGroup>

`

[kamyker]

No idea, "PackageReference Include="Microsoft.AspNetCore" in https://github.com/apache/openwhisk-runtime-dotnet/blob/master/core/dotnet3.1/proxy/Apache.OpenWhisk.Runtime.Common/Apache.OpenWhisk.Runtime.Common.csproj could be the issue.

My version looks a bit different: https://github.com/kamyker/openwhisk-dotnet-csharp/blob/master/core/dotnet3.1/proxy/Apache.OpenWhisk.Runtime.Common/Apache.OpenWhisk.Runtime.Common.csproj

If you can reproduce error without using database (just call something from Microsoft.Extensions.DependencyInjection.Abstractions) I can try it on my fork.

[shawnallen85]

@dmlo Can you try with the latest version from the master branch? @woutersterp had submitted a change that might address this issue. Let me know, thanks!!

[shawnallen85]

I found out what we need to do to resolve this issue, but to implement it requires a breaking change in how functions are built and deployed. Will hold off on this until the next release where we plan on potentially changing the contract.

[shawnallen85]

For reference: https://github.com/shawnallen85/openwhisk-runtime-dotnet/tree/assembly-load-changes

[dgrove-oss]

Closing as this issue was about dotnet 3.1 which is EOL.