ConfigureFunctionsApplicationInsights fails on upgrade of Microsoft.ApplicationInsights.WorkerService

[ErikAndreas]

Description

Following the guide at https://learn.microsoft.com/en-us/azure/azure-functions/dotnet-isolated-process-guide?tabs=ihostapplicationbuilder%2Ccode%2Cwindows#configure-startup for Application Insights and upgrading package Microsoft.ApplicationInsights.WorkerService to v3.0 the line
builder.Services.ConfigureFunctionsApplicationInsights();
will fail:
System.TypeLoadException: 'Could not load type 'Microsoft.ApplicationInsights.Extensibility.ITelemetryInitializer' from assembly 'Microsoft.ApplicationInsights, Version=3.0.0.1, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.'

Steps to reproduce

• function app with app insights configured as per link in description
• update mentioned package to 3.0
• run app

[gszdev]

@ErikAndreas

Have a look at Could not load type 'Microsoft.ApplicationInsights.Extensibility.ITelemetryInitializer' with version 3.0.0 (breaking changes, ...).

Using Microsoft.Azure.Functions.Worker.ApplicationInsights 2.50.0 is not yet compatible with Microsoft.ApplicationInsights.WorkerService 3.0.0 / Microsoft.ApplicationInsights 3.0.0.

Consider to stay on Microsoft.ApplicationInsights.WorkerService 2.23.0 and Microsoft.ApplicationInsights 2.23.0.

For the future you should plan to migrate from Application Insights to Azure Monitor OpenTelemetry.

[ErikAndreas]

Thanks for the reply @gszdev

Any insights into whether Microsoft.Azure.Functions.Worker.ApplicationInsights ever will be compatible with v3+ of Microsoft.ApplicationInsights or not, i.e. will it just "die out" like the OpenApi packages seems to be doing?

[gszdev]

@ErikAndreas

Sorry, I don't know and I don't have an insights. I'm not a Microsoft employee.
And I've got the same error after updating Microsoft.ApplicationInsights from version 2.23.0 to 3.0.0.
The only thing I've found was the comment from @harsimar "...We will collaborate with the functions team so that their next version is compatible with 3.x."

[alex-scanfetch]

Hi everyone, I'm also hitting this issue in prod.

May be worth defining a dependency in Microsoft.Azure.Functions.Worker.ApplicationInsights to require Microsoft.ApplicationInsights.WorkerService 2.23

It would be a little bit of extra package loading, but would stop these issues from compiling in the first place.

[dw-murg]

Also getting this error after updating Microsoft.ApplicationInsights from version 2.23.0 to 3.0.0.

[ncook-hxgn]

Me too, in an Azure Function running on isolated dotnet 10

Edit: Came back to add, downgrading Microsoft.ApplicationInsights.WorkerService to 2.23.0 fixed the issue for me.

I didn't look at Microsoft.Azure.Functions.Worker.ApplicationInsights, but probably I should in future.

[flatproject]

Same here, downgrading to 2.23.

[jickler-o]

Attempting to downgrade now as well.

May be worth defining a dependency in Microsoft.Azure.Functions.Worker.ApplicationInsights to require Microsoft.ApplicationInsights.WorkerService 2.23

It would be a little bit of extra package loading, but would stop these issues from compiling in the first place.

I'd agree with this approach as well. Would also prevent tools that upgrade NuGet packages automatically from upgrading prematurely.