.NET Core 3.1 - Dependency resolution failed for component - AWS Mock Lambda Test Tools

问题

I create a new AWS Lambda .NET Core 3.1 project, then run it using AWS Lambda Test Tools, then I get this page as expected:

However, if I install one of these packages:

Microsoft.EntityFrameworkCore.SqlServer

Microsoft.Data.SqlClient

When I run, I get this error and the test page won't open:

AWS .NET Core 3.1 Mock Lambda Test Tool (0.10.0)
Unknown error occurred causing process exit: Dependency resolution failed for component C:\Users\siri\repos\bolao-futebol\website-core\AWSLambda1\bin\Debug\netcoreapp3.1\AWSLambda1.dll with error code -2147450740. Detailed error: Error:
An assembly specified in the application dependencies manifest (AWSLambda1.deps.json) was not found:
package: 'runtime.win-x64.runtime.native.System.Data.SqlClient.sni', version: '4.4.0'
path: 'runtimes/win-x64/native/sni.dll'

at System.Runtime.Loader.AssemblyDependencyResolver..ctor(String componentAssemblyPath)
at Amazon.Lambda.TestTool.Runtime.LambdaAssemblyLoadContext..ctor(String lambdaPath) in C:\codebuild\tmp\output\src142363207\src\Tools\LambdaTestTool\src\Amazon.Lambda.TestTool\Runtime\LambdaAssemblyLoadContext.cs:line 28
at Amazon.Lambda.TestTool.Runtime.LocalLambdaRuntime.Initialize(String directory, IAWSService awsService) in C:\codebuild\tmp\output\src142363207\src\Tools\LambdaTestTool\src\Amazon.Lambda.TestTool\Runtime\LocalLambdaRuntime.cs:line 71
at Amazon.Lambda.TestTool.Runtime.LocalLambdaRuntime.Initialize(String directory) in C:\codebuild\tmp\output\src142363207\src\Tools\LambdaTestTool\src\Amazon.Lambda.TestTool\Runtime\LocalLambdaRuntime.cs:line 46
at Amazon.Lambda.TestTool.TestToolStartup.Startup(String productName, Action`2 uiStartup, String[] args, RunConfiguration runConfiguration) in C:\codebuild\tmp\output\src142363207\src\Tools\LambdaTestTool\src\Amazon.Lambda.TestTool\TestToolStartup.cs:line 77

I have a .NET Core 2.1 Lambda project with this package and it works fine, it only fails in .NET Core 3.1.

Below is my .csproj in case anyone wants to give a try.

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
    <AWSProjectType>Lambda</AWSProjectType>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Amazon.Lambda.Core" Version="1.1.0" />
    <PackageReference Include="Amazon.Lambda.Serialization.SystemTextJson" Version="1.0.0" />
    <PackageReference Include="Amazon.Lambda.SQSEvents" Version="1.1.0" />
    <PackageReference Include="Amazon.Lambda.AspNetCoreServer" Version="5.0.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.0" />
  </ItemGroup>
</Project>

This works fine deployed on AWS Lambda, it only fails running it locally with the Mock Tools.

Removing Microsoft.EntityFrameworkCore.SqlServer makes it work again.

This was also posted in github a while ago, I'm hoping someone else ran into this and has a fix.

回答1:

Could you try and experiment for me and in your csproj file add the property CopyLocalLockFileAssemblies with a value of true and see if that changes your behavior?

Here is a full csproj file example.

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
    <AWSProjectType>Lambda</AWSProjectType>
    <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Amazon.Lambda.Core" Version="1.1.0" />
    <PackageReference Include="Amazon.Lambda.Serialization.SystemTextJson" Version="1.0.0" />
    <PackageReference Include="System.Data.SqlClient" Version="4.8.1" />
  </ItemGroup>
</Project>

回答2:

I had the same issue when I was trying to deploy my AWS lambda function to the AWS using Terraform.

Adding this property to my lambda functions .csproj file fixed the issue -

<PropertyGroup>
  <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
</PropertyGroup>

来源：https://stackoverflow.com/questions/61355168/net-core-3-1-dependency-resolution-failed-for-component-aws-mock-lambda-tes

标签

aws-lambda

.net-core-3.1