Azure function not running after upgrade to dotnet net6 framework even though I have the latest package

Question

Azure function not running after upgrade to dotnet net6 framework even though I have the latest package

Swatantra Yadav 10 Microsoft Employee

After upgrading my azure functions from dotnet core 3.1 to net6 the function is not starting. The package I reference is more recent than minimum requirement. The error I see in the Azure Portal is that it requires a minimum version of this package 4.2.1.0 even though I am using 5.8.1:

<PackageReference Include="Microsoft.Azure.WebJobs.Extensions.ServiceBus" Version="5.8.1" />

Is there a "maximum version" that is has to be used? I am setting FUNCTIONS_EXTENSION_VERSION= ~4

MuthuKumaranMurugaachari-MSFT 22,441 Reputation points Moderator

2023-03-29T19:48:43.6833333+00:00

Swatantra Yadav Thank you for posting your question in Microsoft Q&A. Based on your description, you are upgrading .NET Core 3.1 to .NET 6 (in-process; based on package reference) and faced some issues after upgrade. Have you followed the steps described in doc: https://learn.microsoft.com/en-us/azure/azure-functions/migrate-version-3-version-4?tabs=net6-in-proc%2Cazure-cli%2Cwindows&pivots=programming-language-csharp#choose-your-target-net?

You are correct, minimum version for Microsoft.Azure.WebJobs.Extensions.ServiceBus is 4.2.1 as per doc: https://github.com/Azure/azure-functions-host/blob/v4.x/src/WebJobs.Script/extensionrequirements.json#L20 and there is no maximum version to be used. Can you please share the details or screenshot of the error as well as XML project file details?
Swatantra Yadav 10 Reputation points Microsoft Employee

2023-03-30T22:42:09.43+00:00

Here is the error message: even though the package i used is 5.8.1

Microsoft.Azure.WebJobs.Script: One or more loaded extensions do not meet the minimum requirements. For more information see https://aka.ms/func-min-extension-versions.
ExtensionStartupType ServiceBusWebJobsStartup from assembly 'Microsoft.Azure.WebJobs.ServiceBus, Version=4.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not meet the required minimum version of 4.2.1.0. Update your NuGet package reference for Microsoft.Azure.WebJobs.Extensions.ServiceBus to 4.2.1 or later.

2 answers

Your answer

MuthuKumaranMurugaachari-MSFT 22,441 Reputation points Moderator

2023-03-29T19:48:43.6833333+00:00

Swatantra Yadav Thank you for posting your question in Microsoft Q&A. Based on your description, you are upgrading .NET Core 3.1 to .NET 6 (in-process; based on package reference) and faced some issues after upgrade. Have you followed the steps described in doc: https://learn.microsoft.com/en-us/azure/azure-functions/migrate-version-3-version-4?tabs=net6-in-proc%2Cazure-cli%2Cwindows&pivots=programming-language-csharp#choose-your-target-net?

You are correct, minimum version for Microsoft.Azure.WebJobs.Extensions.ServiceBus is 4.2.1 as per doc: https://github.com/Azure/azure-functions-host/blob/v4.x/src/WebJobs.Script/extensionrequirements.json#L20 and there is no maximum version to be used. Can you please share the details or screenshot of the error as well as XML project file details?
Swatantra Yadav 10 Reputation points Microsoft Employee

2023-03-30T22:42:09.43+00:00

Here is the error message: even though the package i used is 5.8.1

Microsoft.Azure.WebJobs.Script: One or more loaded extensions do not meet the minimum requirements. For more information see https://aka.ms/func-min-extension-versions.
ExtensionStartupType ServiceBusWebJobsStartup from assembly 'Microsoft.Azure.WebJobs.ServiceBus, Version=4.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not meet the required minimum version of 4.2.1.0. Update your NuGet package reference for Microsoft.Azure.WebJobs.Extensions.ServiceBus to 4.2.1 or later.

Answer 1

Posting this for the benefit of several others who had this issue.

To fix this follow these steps:

Login to azure portal and go to the azure function
go to Advanced tools in the left panel
open “debug tools” on top
Check the version of bad file and if it is older than the minimum version required for net6 then delete it and redeploy
if that does not fix then go to configuration
check the value of variables called “Framework version” make sure it is ~4 https://learn.microsoft.com/en-us/azure/azure-functions/functions-app-settings#functions_extension_version

Answer 2

MuthuKumaranMurugaachari-MSFT 22,441 Moderator

Swatantra Yadav Thanks for sharing the additional info. Based on the exception above, it looks like there is a reference to deprecated library Microsoft.Azure.WebJobs.ServiceBus (https://www.nuget.org/packages/Microsoft.Azure.WebJobs.ServiceBus) in your project file which didn't meet the minimum version enforced. Please remove it and use Microsoft.Azure.WebJobs.Extensions.ServiceBus with version 5.8.1 like you mentioned above and redeploy the app.

I hope this helps with your question and let me know if you have any other questions.

Fernando Jimenez Padilla 5 Reputation points

2023-04-02T11:36:40.5+00:00

Hi MuthuKumaran, as Swantantra, I get the same error and I have no references to the deprecated nuget Microsoft.Azure.WebJobs.ServiceBus. I can see that it that's not exist any Microsoft.Azure.WebJobs.ServiceBus.dll file on the deployed files. Is there any other possible reference to Microsoft.Azure.WebJobs.ServiceBus from another nuget?
MuthuKumaranMurugaachari-MSFT 22,441 Reputation points Moderator

2023-04-04T15:53:51.42+00:00

Fernando Jimenez Padilla We used Kudu console to delete deprecated library Microsoft.Azure.WebJobs.ServiceBus from bin to mitigate the issue. However, I will review and get back to you on this.
Antonio Vazquez 0 Reputation points Microsoft Employee

2023-06-01T23:08:06.6166667+00:00

Hi Fernando, I am experiencing the same issue, were you able to solve it?
Fernando Jimenez Padilla 5 Reputation points

2023-06-02T11:58:41.1266667+00:00

I don't fully remember but I think we had to remove the Azure Function and redeploy it from zero. It looks as if it were a copy of the assembly anywhere or maybe on a cache

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Azure function not running after upgrade to dotnet net6 framework even though I have the latest package

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