How to fix "Microsoft.Azure.WebJobs.Extensions.EventHubs: Method not found: 'Microsoft.Azure.WebJobs.IWebJobsExtensionBuilder Microsoft.Azure.WebJobs.WebJobsExtensionBuilderExtensions.ConfigureOptions(Microsoft.Azure.WebJobs.IWebJobsExtensionBuilder"

Question

I have referenced below packages in my function app but after deployment I am seeing this error and my function app does not start.

<PackageReference Include="Microsoft.Azure.WebJobs" Version="3.0.41" />
<PackageReference Include="Microsoft.Azure.WebJobs.Extensions.EventHubs" Version="6.3.5" />

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Microsoft.Azure.WebJobs.Script: Error configuring services in an external startup class. Microsoft.Azure.WebJobs.Extensions.EventHubs: Method not found: 'Microsoft.Azure.WebJobs.IWebJobsExtensionBuilder Microsoft.Azure.WebJobs.WebJobsExtensionBuilderExtensions.ConfigureOptions(Microsoft.Azure.WebJobs.IWebJobsExtensionBuilder, System.Action`2<Microsoft.Extensions.Configuration.IConfigurationSection,!!0>)'._

Answer 1

Hello @Sachin Yadav (Infosys Ltd)

It seems like there is a version mismatch between the Microsoft.Azure.WebJobs and Microsoft.Azure.WebJobs.Extensions.EventHubs packages.

The error message indicates that the Microsoft.Azure.WebJobs.Extensions.EventHubs package is looking for a method that is not available in the version of Microsoft.Azure.WebJobs that you have installed.

To fix this issue, you can try updating the Microsoft.Azure.WebJobs package to a version that is compatible with the Microsoft.Azure.WebJobs.Extensions.EventHubs package.

You can check the compatibility of the packages from the NuGet package manager. You can also try downgrading the Microsoft.Azure.WebJobs.Extensions.EventHubs package to a version that is compatible with the Microsoft.Azure.WebJobs package you have installed. If neither of these solutions work, you can try removing both packages and then reinstalling them with compatible versions.

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