Azure Function App not working - "Error retrieving function" and "Encountered an error (InternalServerError) from host runtime azure function"

Oleghe, Jeffrey 20

Yesterday i started using Azure Function App, so i can use a Custom Skill for my AI Enrichment. Everything worked fine till today. I wanted to change my code in my function and when in saved it I started getting this weird error "Error retrieving function." and "Encountered an error (InternalServerError) from host runtime azure function". This error keeps coming, even after multiple new deployments of the Azure Functions App.

I'm using a Python Stack, tried 3.11 and 3.12, no difference regarding my error.

I already tried different locations for example EUW and GWC, but the same error.

I cleared my cache, I logged out and in again, I even tried different Browsers.

It appears, after I complete to creation steps for the function and the code + test screen pops up.

Bildschirmfoto 2025-02-08 um 12.16.16

Azure Status dont show any Service Interruptions, but it looks like something is broken in the backend?

Oleghe, Jeffrey 20

Here are some additional information:

Full Exception : System.IO.IOException : The request stream was aborted.  Microsoft.AspNetCore.Connections.ConnectionAbortedException : The HTTP/2 connection faulted.    End of inner exception    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at System.IO.Pipelines.Pipe.GetReadResult(ReadResult& result)    at System.IO.Pipelines.Pipe.GetReadAsyncResult()    at async Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http2.Http2MessageBody.ReadAsync(CancellationToken cancellationToken)    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at System.Threading.Tasks.Sources.ManualResetValueTaskSourceCore`1.ThrowForFailedGetResult()    at System.Threading.Tasks.Sources.ManualResetValueTaskSourceCore`1.GetResult(Int16 token)    at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)    at async Grpc.AspNetCore.Server.Internal.PipeExtensions.ReadStreamMessageAsync[T](PipeReader input,HttpContextServerCallContext serverCallContext,Func`2 deserializer,CancellationToken cancellationToken)    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at System.Threading.Tasks.Sources.ManualResetValueTaskSourceCore`1.ThrowForFailedGetResult()    at System.Threading.Tasks.Sources.ManualResetValueTaskSourceCore`1.GetResult(Int16 token)    at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)    at async Grpc.AspNetCore.Server.Internal.HttpContextStreamReader`1.g__MoveNextAsync|9_0[TRequest](??)    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()    at async Microsoft.Azure.WebJobs.Script.Grpc.FunctionRpcService.EventStream(IAsyncStreamReader`1 requestStream,IServerStreamWriter`1 responseStream,ServerCallContext context) at /src/azure-functions-host/src/WebJobs.Script.Grpc/Server/FunctionRpcService.cs : 73

Loknathsatyasaivarma Mahali 430 Reputation points Microsoft Vendor

2025-02-10T14:55:21.7633333+00:00
Hello @Oleghe, Jeffrey,

Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.

The error messages you are encountering, such as "Error retrieving function" and "Encountered an error (InternalServerError) from host runtime azure function," could be related to several issues with your Azure Function App.

First ensure that your function app has access to its storage account. If the storage account is deleted or the connection strings are invalid, it can lead to runtime errors. Check the application settings for AzureWebJobsStorage and ensure the storage account is accessible.

If you are using a custom container, verify that the container is starting correctly. Check the logs for any errors related to the container startup. You can access the Kudu console to download the Docker logs for further investigation.

Also, if your function app has a daily execution quota configured, it may be temporarily disabled if the quota is exceeded. Check the Azure portal for any notifications regarding the daily usage quota.

Then ensure that the required application settings are correctly configured and have not been deleted or modified. This includes settings like AzureWebJobsStorage.

If your function app is behind a firewall or has inbound IP restrictions, it may be unreachable. Verify the network security group settings and ensure that the necessary inbound rules are configured and if you are using version 4.x of the Functions runtime, check for any warnings or errors related to host ID collisions in the logs.

I think the above provided information will help you in finding the exact cause and solve your issue, if you have further concerns, please feel free to reach out to us.
Loknathsatyasaivarma Mahali 430 Reputation points Microsoft Vendor

2025-02-12T00:50:39.6466667+00:00

Hello @Oleghe, Jeffrey,

I am writing to follow up on the information we provided earlier regarding your issue. We haven't heard back from you, and we wanted to check if the provided solution has resolved your problem. Could you please let us know if the issue has been resolved or if you need any further assistance? Your feedback is important to us, and we are here to help. Thank you for your attention to this matter. We look forward to your response.
Loknathsatyasaivarma Mahali 430 Reputation points Microsoft Vendor

2025-02-13T03:01:24.32+00:00

Hello @Oleghe, Jeffrey,

Just checking in to see if the information above was helpful. If you have any further updates on this issue, please feel free to post them here.

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Azure Function App not working - "Error retrieving function" and "Encountered an error (InternalServerError) from host runtime azure function"

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