Azure Functions timeout for Consumption plan

Question

Is there a way to change the current 5 minutes timeout limit for Azure Functions running under the Consumption plan ?

For some data analytics computations 5 minutes is not enough time.

The alternative of using webjobs doesn't allow parallel execution of the function.

Changed the answer to 10 min as this option was added to the service — donquijote, Jun 18 '18 at 08:32

score 80 · Accepted Answer · edited May 04 '21 at 21:02

80

(Other answer is a bit confusing, so writing instead of editing a lot)

Azure Functions can now run up to 10 minutes using the consumption plan by adding the functionTimeout setting to your host.json file:

In a serverless Consumption plan, the valid range is from 1 second to 10 minutes, and the default value is 5 minutes.

In both Premium and Dedicated (App Service) plans, there is no overall limit, and the default value is 30 minutes. A value of -1 indicates unbounded execution, but keeping a fixed upper bound is recommended

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

File: host.json

// Value indicating the timeout duration for all functions.
// Set functionTimeout to 10 minutes
{
    "functionTimeout": "00:10:00"
}

Source:
https://buildazure.com/2017/08/17/azure-functions-extend-execution-timeout-past-5-minutes/
https://github.com/Azure/azure-webjobs-sdk-script/wiki/host.json

edited May 04 '21 at 21:02

Kashyap

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answered Nov 23 '17 at 04:26

Manohar Reddy Poreddy

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Add "functionTimeout": "00:10:00" to your host.json file – Don Cheadle Apr 15 '19 at 14:40
1

is there a maximum timeout for an azure function hosted on a web app server? – MIKE May 07 '19 at 21:39
@MIKE I lost context of this, see https://github.com/Azure/azure-functions-host/issues/18 and https://github.com/Azure/Azure-Functions/issues/131 , it may help – Manohar Reddy Poreddy May 08 '19 at 11:09
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@ManoharReddyPoreddyCan we capture the timeout exception? – Ravi Khambhati Mar 27 '20 at 22:31
@RaviKhambhati i lost context of this issue as its been 3 years, check if these 2 links are relevant for your case - https://stackoverflow.com/a/48386699/984471 , https://learn.microsoft.com/bs-latn-ba/azure/azure-functions/durable/durable-functions-error-handling?tabs=csharp#function-timeouts – Manohar Reddy Poreddy Mar 28 '20 at 02:33
is that for a single function to execute timeout or general for all functions like going idle timeout? – Emil Jan 31 '21 at 17:57

Thiago Custodio · Answer 2 · 2021-11-18T18:35:01.187

12

Azure Functions can now run up to 10 minutes using the consumption plan: https://learn.microsoft.com/en-us/azure/azure-functions/functions-host-json#functiontimeout

edited Nov 18 '21 at 18:35

answered Feb 21 '17 at 03:58

Thiago Custodio

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They've increased it to 10 minutes ... there is an optional setting in the `host.json`. See ... https://learn.microsoft.com/en-us/azure/azure-functions/functions-scale#consumption-plan – SteveC Jul 27 '17 at 13:04
friend, this answer is from feb/17 – Thiago Custodio Jul 27 '17 at 13:40
1

Yeap, got that ... are you going to update your answer? – SteveC Jul 28 '17 at 10:37
1

Add "functionTimeout": "00:10:00" to your host.json file – Flappy Apr 27 '18 at 12:15
3

my function times out within 2 minutes despite setting the timeout to 10 min – Akshay Kadidal Nov 18 '21 at 18:08

Gill-Bates · Answer 3 · 2021-09-07T14:01:08.777

Here the complete host.json, recarding to the Microsoft Docs:

Don't forget to restart the Function to reload the Configuration!

{
   "version":"2.0",
   "managedDependency":{
      "Enabled":true
   },
   "extensionBundle":{
      "id":"Microsoft.Azure.Functions.ExtensionBundle",
      "version":"[2.*, 3.0.0)"
   },
   "functionTimeout": "00:05:00"
}

Another trick is, only to define the required Az-Modules in requirements.psd1 and not all of them:

Bad:

# This file enables modules to be automatically managed by the Functions service.
# See https://aka.ms/functionsmanageddependency for additional information.
#
@{
    # For latest supported version, go to 'https://www.powershellgallery.com/packages/Az'. 
    # To use the Az module in your function app, please uncomment the line below.
    'Az' = '6.*'
}

Good:

# This file enables modules to be automatically managed by the Functions service.
# See https://aka.ms/functionsmanageddependency for additional information.
#
@{
    # For latest supported version, go to 'https://www.powershellgallery.com/packages/Az'. 
    # To use the Az module in your function app, please uncomment the line below.
    # 'Az' = '6.*'
    'Az.Accounts'  = '2.*'
    'Az.Resources' = '4.*'
    'Az.Monitor'   = '2.*'
}

score 0 · Answer 4 · answered Dec 01 '22 at 15:10

0

You can change the plan to premium but you need to create a new function because you can't change it once it's created already. premium plan has no overall limit.

Here is the official documentation.

answered Dec 01 '22 at 15:10

Vivek Nuna

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Azure Functions timeout for Consumption plan

4 Answers4

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