Cannot execute orchestration written in F#

[landy]

Hello, I'm trying to write durable azure functions using the isolated worker, and so far I had no luck with this. The orchestration throws an exception when triggered. The same solution written in C# works just fine. I created an example repository where the behavior can be observed https://github.com/landy/fsharp-isolated-durable-function.

The exception is

Executed 'Functions.HttpTestOrchestration' (Failed, Id=0660b3b4-f669-4b8c-ab3f-4a5066944186, Duration=163ms)
[2022-12-19T10:56:12.028Z] System.Private.CoreLib: Exception while executing function: Functions.HttpTestOrchestration. System.Private.CoreLib: Res
ult: Failure
Exception: System.InvalidOperationException: Unable to resolve service for type 'Microsoft.DurableTask.Client.IDurableTaskClientProvider' while att
empting to activate 'Microsoft.Azure.Functions.Worker.DefaultDurableClientContext+Converter'.
[2022-12-19T10:56:12.029Z]    at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider pro
vider)
[2022-12-19T10:56:12.030Z]    at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanc
eType, Object[] parameters)
[2022-12-19T10:56:12.031Z]    at Microsoft.Azure.Functions.Worker.Converters.DefaultInputConverterProvider.<GetOrCreateConverterInstance>b__7_0(Str
ing key, String converterTypeAssemblyQualifiedName) in D:\a\_work\1\s\src\DotNetWorker.Core\Converters\Converter\DefaultInputConverterProvider.cs:l
ine 85
[2022-12-19T10:56:12.032Z]    at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd[TArg](TKey key, Func`3 valueFactory, TArg factoryArg
ument)
[2022-12-19T10:56:12.033Z]    at Microsoft.Azure.Functions.Worker.Converters.DefaultInputConverterProvider.GetOrCreateConverterInstance(String conv
erterTypeName) in D:\a\_work\1\s\src\DotNetWorker.Core\Converters\Converter\DefaultInputConverterProvider.cs:line 73
[2022-12-19T10:56:12.035Z]    at Microsoft.Azure.Functions.Worker.Context.Features.DefaultInputConversionFeature.GetConverterFromContext(ConverterC
ontext context) in D:\a\_work\1\s\src\DotNetWorker.Core\Context\Features\DefaultInputConversionFeature.cs:line 108
[2022-12-19T10:56:12.036Z]    at Microsoft.Azure.Functions.Worker.Context.Features.DefaultInputConversionFeature.ConvertAsync(ConverterContext conv
erterContext) in D:\a\_work\1\s\src\DotNetWorker.Core\Context\Features\DefaultInputConversionFeature.cs:line 38
[2022-12-19T10:56:12.037Z]    at Microsoft.Azure.Functions.Worker.Context.Features.DefaultModelBindingFeature.BindFunctionInputAsync(FunctionContex
t context) in D:\a\_work\1\s\src\DotNetWorker.Core\Context\Features\DefaultModelBindingFeature.cs:line 79
[2022-12-19T10:56:12.038Z]    at Microsoft.Azure.Functions.Worker.Invocation.DefaultFunctionExecutor.ExecuteAsync(FunctionContext context) in D:\a\
_work\1\s\src\DotNetWorker.Core\Invocation\DefaultFunctionExecutor.cs:line 41
[2022-12-19T10:56:12.039Z]    at Microsoft.Azure.Functions.Worker.OutputBindings.OutputBindingsMiddleware.Invoke(FunctionContext context, FunctionE
xecutionDelegate next) in D:\a\_work\1\s\src\DotNetWorker.Core\OutputBindings\OutputBindingsMiddleware.cs:line 13
[2022-12-19T10:56:12.040Z]    at Microsoft.Azure.Functions.Worker.Handlers.InvocationHandler.InvokeAsync(InvocationRequest request, WorkerOptions w
orkerOptions) in D:\a\_work\1\s\src\DotNetWorker.Grpc\Handlers\InvocationHandler.cs:line 84
Stack:    at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider provider)
[2022-12-19T10:56:12.041Z]    at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanc
eType, Object[] parameters)
[2022-12-19T10:56:12.043Z]    at Microsoft.Azure.Functions.Worker.Converters.DefaultInputConverterProvider.<GetOrCreateConverterInstance>b__7_0(Str
ing key, String converterTypeAssemblyQualifiedName) in D:\a\_work\1\s\src\DotNetWorker.Core\Converters\Converter\DefaultInputConverterProvider.cs:l
ine 85
[2022-12-19T10:56:12.044Z]    at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd[TArg](TKey key, Func`3 valueFactory, TArg factoryArg
ument)
[2022-12-19T10:56:12.045Z]    at Microsoft.Azure.Functions.Worker.Converters.DefaultInputConverterProvider.GetOrCreateConverterInstance(String conv
erterTypeName) in D:\a\_work\1\s\src\DotNetWorker.Core\Converters\Converter\DefaultInputConverterProvider.cs:line 73
[2022-12-19T10:56:12.046Z]    at Microsoft.Azure.Functions.Worker.Context.Features.DefaultInputConversionFeature.GetConverterFromContext(ConverterC
ontext context) in D:\a\_work\1\s\src\DotNetWorker.Core\Context\Features\DefaultInputConversionFeature.cs:line 108
[2022-12-19T10:56:12.047Z]    at Microsoft.Azure.Functions.Worker.Context.Features.DefaultInputConversionFeature.ConvertAsync(ConverterContext conv
erterContext) in D:\a\_work\1\s\src\DotNetWorker.Core\Context\Features\DefaultInputConversionFeature.cs:line 38
[2022-12-19T10:56:12.049Z]    at Microsoft.Azure.Functions.Worker.Context.Features.DefaultModelBindingFeature.BindFunctionInputAsync(FunctionContex
t context) in D:\a\_work\1\s\src\DotNetWorker.Core\Context\Features\DefaultModelBindingFeature.cs:line 79
[2022-12-19T10:56:12.051Z]    at Microsoft.Azure.Functions.Worker.Invocation.DefaultFunctionExecutor.ExecuteAsync(FunctionContext context) in D:\a\
_work\1\s\src\DotNetWorker.Core\Invocation\DefaultFunctionExecutor.cs:line 41
[2022-12-19T10:56:12.053Z]    at Microsoft.Azure.Functions.Worker.OutputBindings.OutputBindingsMiddleware.Invoke(FunctionContext context, FunctionE
xecutionDelegate next) in D:\a\_work\1\s\src\DotNetWorker.Core\OutputBindings\OutputBindingsMiddleware.cs:line 13
[2022-12-19T10:56:12.055Z]    at Microsoft.Azure.Functions.Worker.Handlers.InvocationHandler.InvokeAsync(InvocationRequest request, WorkerOptions w
orkerOptions) in D:\a\_work\1\s\src\DotNetWorker.Grpc\Handlers\InvocationHandler.cs:line 84.

[jviau]

I opened an issue on the dotnet worker repo with the root cause: Azure/azure-functions-dotnet-worker#1246

This appears to be an F# only issue. The extensibility point we rely on in Functions dotnet-isolated is not called in the F# scenario, meaning the durable extension is not ever configured, rendering it unusable in F#.

[landy]

Thank you!

[jviau]

In the meantime, you can workaround this issue by including a manual call to this method as part of your ConfigureFunctionsWorkerDefaults callback.