Flex Consumption Plan Function App Duplicate Functions

Question

Flex Consumption Plan Function App Duplicate Functions

Chris Gray 10

I have a flex consumption plan which has a duplicate function. I have checked with my dev team to make sure they have not accidentally caused this within the code, but they have confirmed to me that is not the case.

I am deploying using Azure Function Deploy task in Azure DevOps. I have seen other posts which suggest using Kudu but we dont have access to that with flex consumption. Is there a way around this without having to recreate the function app?

Deployment logs have this issue:

"Function triggers synchronization failed due to Response status code does not indicate success: 500 (Internal Server Error). Please run sync trigger manually."

Pashikanti Kumar 1,080 Reputation points Microsoft External Staff Moderator

2025-09-17T19:16:36.5033333+00:00
Hi Chris Gray,

Thank you for posting your question in the Microsoft Q&A forum,

Based on the above shared message, I understand that there were multiple functions with same function name that has been deployed to a single function app.

Could you please check and modify the function app names and redeploy the code.

Post redeploying the code, if you are still facing the issue. I would suggest you create a new function app and deploy the fixed code.

References:

azure - Creating multiple function apps with one Flex Consumption plan - Stack Overflow

Azure Functions Flex Consumption plan hosting | Microsoft Learn

Kindly let us know if the above helps or you need further assistance on this issue.

Please "Upvote" if the information helped you. This will help us and others in the community as well.

Thanks
Chris Gray 10 Reputation points

2025-09-19T07:34:07.6133333+00:00

So my only option is to remove the function app basically? Thats not helpful in most situations
Rakesh Mishra 2,025 Reputation points Microsoft External Staff Moderator

2025-09-22T02:18:25.8033333+00:00

Hi @Chris Gray , following up to see if you had a chance to check my previous response and if it was helpful. Please do let me know if you need any further assistance on this.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
Thiago Almeida 16 Reputation points Microsoft Employee

2025-10-21T23:12:29.6433333+00:00

WEBSITE_RUN_FROM_PACKAGE = 1 doesn't apply to Flex Consumption
Pashikanti Kumar 1,080 Reputation points Microsoft External Staff Moderator

2025-10-22T00:15:02.52+00:00
Hi Thiago Almeida,

Based on the response provided by Rakesh Mishra please follow the below steps

There is currently a known issue in Azure Function App with Flex consumption plan. Below are the issues open in GitHub.

https://github.com/Azure/azure-functions-host/issues/11284 - checking for duplicates in host

https://github.com/Azure/azure-functions-dotnet-worker/issues/3158 - checking for duplicates on worker side.

Unfortunately, currently there is no other way to recover the function app host once code with duplicate functions is deployed. Function App would have to be recreated. To avoid this issue in future, we need to debug code in local. Functions CLI tools does throw an error while running project.

Hope this helps! Please do let me know if you have any other questions on this.
Thiago Almeida 16 Reputation points Microsoft Employee

2025-10-22T16:39:50.0666667+00:00

I'm not the OP of this feedback, stop telling me. My recommendation would still be a support ticket, if their code doesn't have duplicates then there's something else wrong.

2 answers

Your answer

Pashikanti Kumar 1,080 Reputation points Microsoft External Staff Moderator

2025-09-17T19:16:36.5033333+00:00

Hi Chris Gray,

Thank you for posting your question in the Microsoft Q&A forum,

Based on the above shared message, I understand that there were multiple functions with same function name that has been deployed to a single function app.

Could you please check and modify the function app names and redeploy the code.

Post redeploying the code, if you are still facing the issue. I would suggest you create a new function app and deploy the fixed code.

References:

azure - Creating multiple function apps with one Flex Consumption plan - Stack Overflow

Azure Functions Flex Consumption plan hosting | Microsoft Learn

Kindly let us know if the above helps or you need further assistance on this issue.

Please "Upvote" if the information helped you. This will help us and others in the community as well.

Thanks
Chris Gray 10 Reputation points

2025-09-19T07:34:07.6133333+00:00

So my only option is to remove the function app basically? Thats not helpful in most situations
Rakesh Mishra 2,025 Reputation points Microsoft External Staff Moderator

2025-09-22T02:18:25.8033333+00:00

Hi @Chris Gray , following up to see if you had a chance to check my previous response and if it was helpful. Please do let me know if you need any further assistance on this.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
Thiago Almeida 16 Reputation points Microsoft Employee

2025-10-21T23:12:29.6433333+00:00

WEBSITE_RUN_FROM_PACKAGE = 1 doesn't apply to Flex Consumption
Pashikanti Kumar 1,080 Reputation points Microsoft External Staff Moderator

2025-10-22T00:15:02.52+00:00

Hi Thiago Almeida,

Based on the response provided by Rakesh Mishra please follow the below steps

There is currently a known issue in Azure Function App with Flex consumption plan. Below are the issues open in GitHub.

https://github.com/Azure/azure-functions-host/issues/11284 - checking for duplicates in host

https://github.com/Azure/azure-functions-dotnet-worker/issues/3158 - checking for duplicates on worker side.

Unfortunately, currently there is no other way to recover the function app host once code with duplicate functions is deployed. Function App would have to be recreated. To avoid this issue in future, we need to debug code in local. Functions CLI tools does throw an error while running project.

Hope this helps! Please do let me know if you have any other questions on this.
Thiago Almeida 16 Reputation points Microsoft Employee

2025-10-22T16:39:50.0666667+00:00

I'm not the OP of this feedback, stop telling me. My recommendation would still be a support ticket, if their code doesn't have duplicates then there's something else wrong.

Answer 1

Hi Chris Gray,

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

There is currently a known issue in Azure Function App with Flex consumption plan. Below are the issues open in GitHub.

https://github.com/Azure/azure-functions-host/issues/11284 - checking for duplicates in host
https://github.com/Azure/azure-functions-dotnet-worker/issues/3158 - checking for duplicates on worker side.

Unfortunately, currently there is no other way to recover the function app host once code with duplicate functions is deployed. Function App would have to be recreated.

To avoid this issue in future, we need to debug code in local. Functions CLI tools does throw an error while running project.

Hope this helps! Please do let me know if you have any other questions on this.

Answer 2

Thiago Almeida 16 Microsoft Employee

Chris - this is not normal behavior. Does Application Insights show any other exceptions in the trace or exceptions tables related to this problem? Or did you create a support ticket for this? We should get to the bottom of why this is happening and you are getting Internal Server Error from the deployment.

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Flex Consumption Plan Function App Duplicate Functions

2 answers

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