Timeout in Function App hosted in App Service plan

Question

My Azure time_triggered function app which is hosted in app service plan shows following error:

Timeout value of 00:05:00 exceeded by function 'Functions.TimerTrigger1' (Id: 'acd62752-5c30-4ba9-8ee6-f21eb7bf11f6'). Initiating cancellation.

Answer 1

Hi @Majid N | BIMAGE ,

by default the timeout of a function in a consumption plan is 5 minutes and can be increased to 10 minutes at the maximum:

Function app timeout duration

To increase the timeout you can edit the "functionTimeout" value in the host.json: Sample host.json file

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards

Andreas Baumgarten

Answer 2

Hi,

Please confirm that you have set functionTimeout to higher value in your function app's host.json file. Additionally, please make sure Always on is set to On in your Function App -- Configuration blade -- General settings tab.

For example, you might set functionTimeout to 30 minutes in your host.json file, snippet below:

{
    "functionTimeout": "00:30:00" 
}

host.json reference - functionTimeout

https://learn.microsoft.com/en-us/azure/azure-functions/functions-host-json#functiontimeout

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP

Answer 3

Hello @Majid N | BIMAGE

This error message indicates that the function Functions.TimerTrigger1 has exceeded the timeout value of 5 minutes. The timeout duration for functions in a function app is defined by the functionTimeout property in the host.json project file. This property applies specifically to function executions.

After the trigger starts function execution, the function needs to return/respond within the timeout duration. To resolve this issue, you can increase the timeout duration for your function app by updating the functionTimeout property in the host.json file.

You can set the value to a higher value than the current value of 5 minutes. Here is an example of how to set the functionTimeout property to 10 minutes in the host.json file:

{ "functionTimeout": "00:10:00" }

After updating the host.json file, you need to redeploy your function app for the changes to take effect.

I hope this helps

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