Functions dotnet 10 does not run on azure function elastic linux

[ctc-ak]

Description

When zip deploying an isolated function to an azure linux function, I get the following error on startup with the below package configuration. The setup worked fine with dotnet 8 and older nuget packages. When I rolled back "Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues" to Version="5.5.0" and "Microsoft.Azure.Functions.Worker" to Version="2.2.0", I was able to get rid of the assembly mismatch error but then I got "You must install or update .NET to run this application." Framework: 'Microsoft.NETCore.App', version '10.0.0' (x64), The following frameworks were found 8.0.8 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Appears like my azure deployment does not have dotnet 10?

function runtime: 4.34.2.2
"kind": "functionapp,linux,container"

Details [{"outerId":"0","message":"Error configuring services in an external startup class.","type":"Microsoft.Azure.WebJobs.Script.ExternalStartupException","id":"50986030"},{"outerId":"50986030","message":"Could not load file or assembly 'System.ComponentModel, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.\n","type":"System.IO.FileNotFoundException","id":"45027214","parsedStack":[{"assembly":"Microsoft.Azure.WebJobs.Extensions.Storage.Queues, Version=5.3.6.0, Culture=neutral, PublicKeyToken=92742159e12e44c8","method":"Microsoft.Extensions.Hosting.StorageQueuesWebJobsBuilderExtensions.AddAzureStorageQueues","level":0,"line":0},{"assembly":"Microsoft.Azure.WebJobs.Extensions.Storage.Queues, Version=5.3.6.0, Culture=neutral, PublicKeyToken=92742159e12e44c8","method":"Microsoft.Azure.WebJobs.Extensions.Storage.AzureStorageQueuesWebJobsStartup.Configure","level":1,"line":0},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.ConfigureStartup","level":2,"line":166,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.ConfigureAndLogUserConfiguredServices","level":3,"line":130,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.UseWebJobsStartup","level":4,"line":115,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.UseExternalStartup","level":5,"line":213,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Script, Version=4.34.0.0, Culture=neutral, PublicKeyToken=null","method":"Microsoft.Azure.WebJobs.Script.ScriptHostBuilderExtensions+<>c__DisplayClass7_0.<AddScriptHostCore>b__1","level":6,"line":235,"fileName":"/src/azure-functions-host/src/WebJobs.Script/ScriptHostBuilderExtensions.cs"}]}] 0 {"outerId":"0","message":"Error configuring services in an external startup class.","type":"Microsoft.Azure.WebJobs.Script.ExternalStartupException","id":"50986030"} 1 {"outerId":"50986030","message":"Could not load file or assembly 'System.ComponentModel, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.\n","type":"System.IO.FileNotFoundException","id":"45027214","parsedStack":[{"assembly":"Microsoft.Azure.WebJobs.Extensions.Storage.Queues, Version=5.3.6.0, Culture=neutral, PublicKeyToken=92742159e12e44c8","method":"Microsoft.Extensions.Hosting.StorageQueuesWebJobsBuilderExtensions.AddAzureStorageQueues","level":0,"line":0},{"assembly":"Microsoft.Azure.WebJobs.Extensions.Storage.Queues, Version=5.3.6.0, Culture=neutral, PublicKeyToken=92742159e12e44c8","method":"Microsoft.Azure.WebJobs.Extensions.Storage.AzureStorageQueuesWebJobsStartup.Configure","level":1,"line":0},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.ConfigureStartup","level":2,"line":166,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.ConfigureAndLogUserConfiguredServices","level":3,"line":130,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.UseWebJobsStartup","level":4,"line":115,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.UseExternalStartup","level":5,"line":213,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Script, Version=4.34.0.0, Culture=neutral, PublicKeyToken=null","method":"Microsoft.Azure.WebJobs.Script.ScriptHostBuilderExtensions+<>c__DisplayClass7_0.<AddScriptHostCore>b__1","level":6,"line":235,"fileName":"/src/azure-functions-host/src/WebJobs.Script/ScriptHostBuilderExtensions.cs"}]} id 45027214 message Could not load file or assembly 'System.ComponentModel, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified. outerId 50986030 parsedStack [{"assembly":"Microsoft.Azure.WebJobs.Extensions.Storage.Queues, Version=5.3.6.0, Culture=neutral, PublicKeyToken=92742159e12e44c8","method":"Microsoft.Extensions.Hosting.StorageQueuesWebJobsBuilderExtensions.AddAzureStorageQueues","level":0,"line":0},{"assembly":"Microsoft.Azure.WebJobs.Extensions.Storage.Queues, Version=5.3.6.0, Culture=neutral, PublicKeyToken=92742159e12e44c8","method":"Microsoft.Azure.WebJobs.Extensions.Storage.AzureStorageQueuesWebJobsStartup.Configure","level":1,"line":0},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.ConfigureStartup","level":2,"line":166,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.ConfigureAndLogUserConfiguredServices","level":3,"line":130,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.UseWebJobsStartup","level":4,"line":115,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.UseExternalStartup","level":5,"line":213,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"},{"assembly":"Microsoft.Azure.WebJobs.Script, Version=4.34.0.0, Culture=neutral, PublicKeyToken=null","method":"Microsoft.Azure.WebJobs.Script.ScriptHostBuilderExtensions+<>c__DisplayClass7_0.<AddScriptHostCore>b__1","level":6,"line":235,"fileName":"/src/azure-functions-host/src/WebJobs.Script/ScriptHostBuilderExtensions.cs"}] 0 {"assembly":"Microsoft.Azure.WebJobs.Extensions.Storage.Queues, Version=5.3.6.0, Culture=neutral, PublicKeyToken=92742159e12e44c8","method":"Microsoft.Extensions.Hosting.StorageQueuesWebJobsBuilderExtensions.AddAzureStorageQueues","level":0,"line":0} 1 {"assembly":"Microsoft.Azure.WebJobs.Extensions.Storage.Queues, Version=5.3.6.0, Culture=neutral, PublicKeyToken=92742159e12e44c8","method":"Microsoft.Azure.WebJobs.Extensions.Storage.AzureStorageQueuesWebJobsStartup.Configure","level":1,"line":0} 2 {"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.ConfigureStartup","level":2,"line":166,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"} 3 {"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.ConfigureAndLogUserConfiguredServices","level":3,"line":130,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"} 4 {"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.UseWebJobsStartup","level":4,"line":115,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"} 5 {"assembly":"Microsoft.Azure.WebJobs.Host, Version=3.0.41.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35","method":"Microsoft.Azure.WebJobs.WebJobsBuilderExtensions.UseExternalStartup","level":5,"line":213,"fileName":"D:\\a\\_work\\1\\s\\src\\Microsoft.Azure.WebJobs.Host\\Hosting\\WebJobsBuilderExtensions.cs"} 6 {"assembly":"Microsoft.Azure.WebJobs.Script, Version=4.34.0.0, Culture=neutral, PublicKeyToken=null","method":"Microsoft.Azure.WebJobs.Script.ScriptHostBuilderExtensions+<>c__DisplayClass7_0.<AddScriptHostCore>b__1","level":6,"line":235,"fileName":"/src/azure-functions-host/src/WebJobs.Script/ScriptHostBuilderExtensions.cs"} type System.IO.FileNotFoundException

<Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <TargetFramework>net10.0</TargetFramework> <AzureFunctionsVersion>v4</AzureFunctionsVersion> <OutputType>Exe</OutputType> <ImplicitUsings>enable</ImplicitUsings> <Nullable>enable</Nullable> <Version>5.38.0.0</Version> <AssemblyVersion>5.38.0.0</AssemblyVersion> <FileVersion>5.38.0.0</FileVersion> <UserSecretsId>423d0020-770d-46ac-8c73-dc69a3ebf2af</UserSecretsId> </PropertyGroup> <ItemGroup> <FrameworkReference Include="Microsoft.AspNetCore.App" /> <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.51.0" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.3.0" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="2.1.0" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Blobs" Version="6.8.0" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.0.7" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues" Version="5.5.3" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Timer" Version="4.3.1" /> <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="10.0.1" /> <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.23.0" /> <PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="2.50.0" /> </ItemGroup> <ItemGroup> <ProjectReference Include="..\Ctc.WebCore\Ctc.WebCore.csproj" /> <ProjectReference Include="..\Nexus\Nexus.csproj" /> </ItemGroup> <ItemGroup> <None Update="host.json"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </None> <None Update="local.settings.json"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> <CopyToPublishDirectory>Never</CopyToPublishDirectory> </None> </ItemGroup> <ItemGroup> <Using Include="System.Threading.ExecutionContext" Alias="ExecutionContext" /> </ItemGroup> </Project>

Steps to reproduce

Create dotnet functions projects with the above nuget packages.
zip deploy via azure pipelines to slot

[kshyju]

@ctc-ak Could you double check that the package was created correctly and that it contains the .azurefunctions folder with the DLLs?

If you could share information about your app, I could take a look at the backend logs. See Sharing Your Function App name privately

[ctc-ak]

East US 1/10/2026, 9:43:28.435 PM Initializing Host. OperationId: '0b10f75d-dac8-4173-9d6f-4de3de13d257'.

[kshyju]

Thanks @ctc-ak
Are you using a custom image for your app? Does your image have the required runtime bits?

[ctc-ak]

I don't have anything custom. My app service is setup as a docker container, but I use zip deploy. Looking at the zip deploy logs, it seems like its doing some docker operations in the implicitly. In the build deployment section, it says its managed by Azure Devops.