Azure-functions-vs-build-sdk: Could not load file or assembly 'System.IdentityModel.Tokens.Jwt, Version=6.7.1.0

[prabh-62]

Steps to Reproduce

• Ensure you have Azure Functions V3 func CLI from Github releases and .NET Core 3.1 SDK
• > func --version
3.0.2630
• > func init ImageService --dotnet
• > cd ImageService
• > func new -l C# Create new function with HTTP trigger
• > dotnet add package System.IdentityModel.Tokens.Jwt
• Update code in HTTP trigger with this snippet

namespace ImageService
{
    public static class Hello
    {
        [FunctionName("Hello")]
        public static async Task<IActionResult> Run(
            [HttpTrigger(AuthorizationLevel.Function, "get", Route = null)] HttpRequest req,
            ILogger log)
        {
            // Use nuget: System.IdentityModel.Tokens.Jwt
            var handler = new JwtSecurityTokenHandler();
            return new OkObjectResult("Hello");
        }
    }
}

• > func start

• And we can hit the API endpoint and get 200 OK
  

• Now, update nuget Microsoft.NET.Sdk.Functions to 3.0.9 and run func start again
  

• We get an exception

Executed 'Hello' (Failed, Id=a85a430a-6936-4d0b-8db7-9f04365e893c)
[2020-08-06 6:25:05 PM] System.Private.CoreLib: Exception while executing function: Hello. ImageService: Could not load file or assembly 'System.IdentityModel.Tokens.Jwt, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.

[prabh-62]

As per this comment, I understand we can use property <_FunctionsSkipCleanOutput>true</_FunctionsSkipCleanOutput> in *.csproj file however it feels more like a workaround and we would like a better solution

[lkurzyniec]

Experienced the same here

[12.08.2020 13:31:15] System.Private.CoreLib: Exception while executing function: System.Private.CoreLib: Unable to load one or more of the requested types.
[12.08.2020 13:31:15] System.Private.CoreLib: Exception while executing function: System.Private.CoreLib: Unable to load one or more of the requested types.
[12.08.2020 13:31:15] Could not load file or assembly 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
[12.08.2020 13:31:15] Could not load file or assembly 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
[12.08.2020 13:31:15] Could not load file or assembly 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
[12.08.2020 13:31:15] Could not load file or assembly 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
[12.08.2020 13:31:15] e820aeb43c8645d5b0dd0cfd8e7a573c:0: Function 'AutomotiveLeadIndexing_StartAuditLog (Activity)' failed with an error. Reason: System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types.
[12.08.2020 13:31:15] Could not load file or assembly 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
[12.08.2020 13:31:15] Could not load file or assembly 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
[12.08.2020 13:31:15]    at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)
[12.08.2020 13:31:15]    at System.Reflection.RuntimeAssembly.get_DefinedTypes()
[12.08.2020 13:31:15]    at Scrutor.TypeSourceSelector.<>c.<InternalFromAssemblies>b__20_0(Assembly asm)
[12.08.2020 13:31:15]    at System.Linq.Enumerable.SelectManySingleSelectorIterator`2.MoveNext()
[12.08.2020 13:31:15]    at System.Linq.Enumerable.SelectEnumerableIterator`2.MoveNext()
[12.08.2020 13:31:15]    at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
[12.08.2020 13:31:15]    at Scrutor.LifetimeSelector.Scrutor.ISelector.Populate(IServiceCollection services, RegistrationStrategy strategy)
[12.08.2020 13:31:15]    at Scrutor.ServiceTypeSelector.Scrutor.ISelector.Populate(IServiceCollection services, RegistrationStrategy registrationStrategy)
[12.08.2020 13:31:15]    at Scrutor.ImplementationTypeSelector.Scrutor.ISelector.Populate(IServiceCollection services, RegistrationStrategy registrationStrategy)
[12.08.2020 13:31:15]    at Scrutor.TypeSourceSelector.Populate(IServiceCollection services, RegistrationStrategy registrationStrategy)
[12.08.2020 13:31:15]    at Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions.Populate(IServiceCollection services, ISelector selector, RegistrationStrategy registrationStrategy)
[12.08.2020 13:31:15]    at Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions.Scan(IServiceCollection services, Action`1 action)

.. my proj stack...

[12.08.2020 13:31:15]    at lambda_method(Closure , FunctionAutomotiveLeadIndexer , Object[] )
[12.08.2020 13:31:15] Host started (10730ms)
[12.08.2020 13:31:15]    at Microsoft.Azure.WebJobs.Host.Executors.MethodInvokerWithReturnValue`2.InvokeAsync(TReflected instance, Object[] arguments) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\MethodInvokerWithReturnValue.cs:line 21
[12.08.2020 13:31:15] Job host started
[12.08.2020 13:31:15]    at Microsoft.Azure.WebJobs.Host.Executors.FunctionInvoker`2.InvokeAsync(Object instance, Object[] arguments) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionInvoker.cs:line 52
[12.08.2020 13:31:15]    at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.InvokeAsync(IFunctionInvoker invoker, ParameterHelper parameterHelper, CancellationTokenSource timeoutTokenSource, CancellationTokenSource functionCancellationTokenSource, Boolean throwOnTimeout, TimeSpan timerInterval, IFunctionInstance instance) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 568
[12.08.2020 13:31:15]    at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithWatchersAsync(IFunctionInstanceEx instance, ParameterHelper parameterHelper, ILogger logger, CancellationTokenSource functionCancellationTokenSource) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 514
[12.08.2020 13:31:15]    at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(IFunctionInstanceEx instance, ParameterHelper parameterHelper, IFunctionOutputDefinition outputDefinition, ILogger logger, CancellationTokenSource functionCancellationTokenSource) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 460
[12.08.2020 13:31:15]    at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(IFunctionInstanceEx instance, FunctionStartedMessage message, FunctionInstanceLogEntry instanceLogEntry, ParameterHelper parameterHelper, ILogger logger, CancellationToken cancellationToken) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 270
[12.08.2020 13:31:15] System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
[12.08.2020 13:31:15] File name: 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'
[12.08.2020 13:31:15] System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
[12.08.2020 13:31:15] File name: 'Microsoft.IdentityModel.Tokens, Version=6.7.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

I checked all versions below starting from 3.0.9 ending with 3.0.3. Version 3.0.3 seems to work fine.

[SychevIgor]

https://github.com/Azure/azure-functions-vs-build-sdk/issues/397