Azure Functions
An Azure service that provides an event-driven serverless compute platform.
4,289 questions
.Net 8 dotnet-isolated runtime starup errors for function app
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Muhammad Ammad Khan
0
Reputation points
I successfully migrated one of the function apps while another ran into an error and I get the following error on startup while locally it runs fine
I have removed the WEBSITE_RUN_FROM_PACKAGE from app settings while it automatically gets created when deploying from Azure pipeline. The configuration is set to correct .NET Version that is .Net 8 Isolated
If I don't delete WEBSITE_RUN_FROM_PACKAGE before release I get following error in the pipeline
Failed to sync triggers for function app 'functionApp'. Error: BadRequest - Encountered an error (BadGateway) from host runtime. (CODE: 400)
Microsoft.Azure.WebJobs.Script.HostInitializationException : Did not find functions with language [dotnet-isolated].
at Microsoft.Azure.WebJobs.Script.Utility.VerifyFunctionsMatchSpecifiedLanguage(IEnumerable`1 functions,String workerRuntime,Boolean isPlaceholderMode,Boolean isHttpWorker,CancellationToken cancellationToken) at /src/azure-functions-host/src/WebJobs.Script/Utility.cs : 641
at async Microsoft.Azure.WebJobs.Script.ScriptHost.GetFunctionDescriptorsAsync(IEnumerable`1 functions,IEnumerable`1 descriptorProviders,String workerRuntime,CancellationToken cancellationToken) at /src/azure-functions-host/src/WebJobs.Script/Host/ScriptHost.cs : 768
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.Azure.WebJobs.Script.ScriptHost.InitializeFunctionDescriptorsAsync(IEnumerable`1 functionMetadata,String workerRuntime,CancellationToken cancellationToken) at /src/azure-functions-host/src/WebJobs.Script/Host/ScriptHost.cs : 542
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.Azure.WebJobs.Script.ScriptHost.InitializeAsync(CancellationToken cancellationToken) at /src/azure-functions-host/src/WebJobs.Script/Host/ScriptHost.cs : 317
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.Azure.WebJobs.Script.ScriptHost.StartAsyncCore(CancellationToken cancellationToken) at /src/azure-functions-host/src/WebJobs.Script/Host/ScriptHost.cs : 259
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.Azure.WebJobs.Script.WebHost.WebJobsScriptHostService.UnsynchronizedStartHostAsync(ScriptHostStartupOperation activeOperation,Int32 attemptCount,JobHostStartupMode startupMode) at /src/azure-functions-host/src/WebJobs.Script.WebHost/WebJobsScriptHostService.cs : 376
{count} votes
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Ryan Hill 25,826 Reputation points Microsoft Employee2024-04-19T19:22:06.3233333+00:00 @Muhammad Ammad Khan can you share a snippet of your pipeline? Do you get the same error if you deploy from VS Code or CLI, e.g.
func azure functionapp publish <APP_NAME> -
Muhammad Ammad Khan 0 Reputation points
2024-04-22T11:06:22.5766667+00:00 @Ryan Hill
If I useConfigureFunctionsWorkerDefaultsthen it works after deployment and when usingConfigureFunctionsWebApplication()I get aHostInitializationExceptionexception while both versions work locally fineYes its same behaviour upon deployment from VS publish
Here is my program.cs
hostBuilder .ConfigureFunctionsWorkerDefaults() // ..ConfigureFunctionsWebApplication() .ConfigureAppConfiguration((context, builder) => { var managedIdentityId = tempConfig["ManagedIdentityClientId"]; var tokenCredential = string.IsNullOrWhiteSpace(managedIdentityId) ? new DefaultAzureCredential() : new DefaultAzureCredential(new DefaultAzureCredentialOptions { ManagedIdentityClientId = managedIdentityId }); builder .SetBasePath(context.HostingEnvironment.ContentRootPath) .AddJsonFile("appsettings.json", optional: true, reloadOnChange: false) .AddJsonFile($"appsettings.{environmentName}.json", optional: true, reloadOnChange: false) .AddUserSecrets(Assembly.GetExecutingAssembly(), true) .AddEnvironmentVariables() .AddAzureKeyVault(GetKeyVaultUri(keyVaultName), tokenCredential) .AddAzureAppConfiguration(options => { options.Connect(new Uri(appConfigEndpoint), tokenCredential) .SelectCommonSettings(environmentName) .SelectSettingsForApplication(application, environmentName) .UseFeatureFlags(featureFlagOptions => { featureFlagOptions.AddApplicationFeatureFlags(application, environmentName); featureFlagOptions.CacheExpirationInterval = TimeSpan.FromMinutes(5); }); options.TrimAppAndShared(application); options.RegisterConfigRefresh(application, TimeSpan.FromMinutes(5)); }); }) .ConfigureServices((builder, services) => { services.AddLogging() .AddAzureAppConfiguration() .AddValidatorAndConfigs() .AddApplicationServices() .AddFeatureManagement(); // Further Services registration services.AddApplicationInsightsTelemetryWorkerService(); services.ConfigureFunctionsApplicationInsights(); }) .Build() .Run(); -
Ryan Hill 25,826 Reputation points Microsoft Employee
2024-04-22T14:26:46.47+00:00 @Muhammad Ammad Khan, none of the suggestions listed on https://stackoverflow.com/questions/69104798/error-did-not-find-functions-with-language-dotnet-isolated-in-azure-function helped?
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Muhammad Ammad Khan 0 Reputation points
2024-04-22T15:30:54.7233333+00:00 I validated all of my environment var are correct and are in place
- LinuxFxVersion is set correctly = DOTNET-ISOLATED|8.0
- .NET Version is set correctly .Net 8 Isolated
- Env Var FUNCTIONS_EXTENSION_VERSION is set corectly = ~4
- Env Var FUNCTIONS_WORKER_RUNTIME is set correctly = dotnet-isolated
Here are my .csproj contents
<!-- The function has been migrated to isolated function https://learn.microsoft.com/en-us/azure/azure-functions/migrate-dotnet-to-isolated-model?tabs=net8 --> <Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <TargetFramework>net8.0</TargetFramework> <AzureFunctionsVersion>v4</AzureFunctionsVersion> <Nullable>enable</Nullable> <NoWarn>CA1707;CA1716</NoWarn> <OutputType>Exe</OutputType> <UserSecretsId>f5073663-a632-4d79-97ce-538f6770cb71</UserSecretsId> </PropertyGroup> <ItemGroup> <FrameworkReference Include="Microsoft.AspNetCore.App" /> <PackageReference Include="Microsoft.AspNetCore.AzureKeyVault.HostingStartup" Version="2.0.4" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.DurableTask" Version="1.1.2" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Timer" Version="4.3.0" /> <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="1.21.0" /> <!-- Do not update 'Microsoft.Azure.Functions.Worker.Sdk' because latest version causes pipeline failure https://github.com/Azure/azure-functions-dotnet-worker/issues/2316#issuecomment-1974882858 --> <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="1.16.0" OutputItemType="Analyzer"/> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues" Version="5.3.0" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.EventGrid" Version="3.4.1" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="1.2.1" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="1.2.0" /> <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.1.0" /> <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.22.0" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.OpenApi " Version="1.5.1" /> <PackageReference Include="Microsoft.Azure.WebJobs.Script.ExtensionsMetadataGenerator" Version="4.0.1" /> </ItemGroup> <ItemGroup> <PackageReference Include="Azure.Extensions.AspNetCore.Configuration.Secrets" Version="1.3.1" /> <PackageReference Include="Azure.Identity" Version="1.11.1" /> <PackageReference Include="Azure.Security.KeyVault.Secrets" Version="4.5.0" /> <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="8.0.0" /> <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="8.0.0" /> <PackageReference Include="Microsoft.FeatureManagement.AspNetCore" Version="3.2.0" /> <PackageReference Include="Ulid" Version="1.3.3" /> </ItemGroup> <ItemGroup> <None Update="appsettings.Development.json"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> <ExcludeFromSingleFile>true</ExcludeFromSingleFile> <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory> </None> <None Update="appsettings.json"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> <ExcludeFromSingleFile>true</ExcludeFromSingleFile> <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory> </None> <None Update="appsettings.PROD.json"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> <ExcludeFromSingleFile>true</ExcludeFromSingleFile> <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory> </None> <None Update="appsettings.QA.json"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> <ExcludeFromSingleFile>true</ExcludeFromSingleFile> <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory> </None> <None Update="host.json"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </None> <None Update="local.settings.json"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> <CopyToPublishDirectory>Never</CopyToPublishDirectory> </None> </ItemGroup> <ItemGroup> <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute"> <_Parameter1>$(AssemblyName).Tests</_Parameter1> <!-- We use the value of AssemblyName to declare the value of the attribute --> </AssemblyAttribute> </ItemGroup> <ItemGroup> <Using Include="System.Threading.ExecutionContext" Alias="ExecutionContext" /> </ItemGroup> </Project>Here is my
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