EventGrid trigger throwing MethodNotImplemented exception.

[yojagad]

Details about the issue here.
Azure/azure-functions-host#6328

The issue is not language specific. Confirmed that removing bundles, adding an eventgrid extension (2.1.0) was still causing the issue. Downgrading to 2.0.0 reverted to proper behavior.

Stack trace

System.NotImplementedException : The method or operation is not implemented. at async Microsoft.Azure.WebJobs.Host.Bindings.TriggerAdapterBindingProvider`2.ExactBinding`1.BindAsync[TAttribute,TTriggerValue,TUserType](??) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Bindings\BindingProviders\TriggerAdapterBindingProvider.cs : 213 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at async Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.TriggerWrapper.BindAsync(Object value,ValueBindingContext context) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs : 479 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at async Microsoft.Azure.WebJobs.Host.Triggers.TriggeredFunctionBinding`1.BindCoreAsync[TTriggerValue](ValueBindingContext context,Object value,IDictionary`2 parameters) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Triggers\TriggeredFunctionBinding.cs : 57

[qualitas-software]

I was getting this error yesterday in a proof of concept I was building using dotnetcore3.1 Azure Functions EventGridTrigger. In the PoC I was using Postman to make HTTP calls to the function as a test.

My problem, I discovered, is I'd copied from an article that was using the Functions v1 endpoint URL, once I changed to using the v2 URL the problem was resolved:

http://localhost:{port}/runtime/webhooks/eventgrid?functionName={myEventGridSubscriber}