Azure Function Timer not triggered on minute intervals

Question

Azure Function Timer not triggered on minute intervals

Vincent Janssen 0

I am trying to create a timer function (within my function app) that will renew a certain web hook.

In the end I want to have it run once every day, but for development purposes I have tried running it every second. Running it every second seems to work. Setting the schedule to: '*/59 * * * * *' also works. However the moment I change to anything with a minute or more schedule like: '0 */1 * * * *' it is not invoked anymore.

The function app is on the Consumption Plan. I have deployed it using command line (func azure functionapp publish)

Sample invocation ID: 8722a4bb-7ff8-4192-b99c-9a27e78f7701

Timestamp of invocation: 2025-07-14T11:29:00.0093686Z

Anonymous

2025-08-01T13:42:08.5466667+00:00

Hi Vincent Janssen,

Thanks for posting Question in Microsoft Q&A!

Thank you for providing the details regarding the issue. To better understand the behavior and assist you effectively, I’d like to ask a few additional questions

1.Can you please check Application Insights or monitoring and share any logs from the time when the function was supposed to run but didn’t?

2.Which Azure region is the function hosted in?

3.Do you have any Application Settings or 'Always On' enabled? (Consumption Plan doesn’t support Always On, but good to confirm

4.Can you confirm the runtime stack you're using (.NET / Node.js / Python) and the version?

These details will help us narrow down the issue and suggest the most appropriate solution.

Looking forward to your response.
Anonymous

2025-08-12T12:18:36.8133333+00:00

Hi Vincent Janssen,

Thanks for your patience.

Based on the provided Function Invocation ID: "8722a4bb-7ff8-4192-b99c-9a27e78f7701", I have reviewed the backend logs and confirmed that this execution occurred on 2025-07-14 at 11:29 UTC. The configured CRON expression for this invocation is '0,59 * * * * *'.

We have reviewed the logs for more than a day by considering the above invocation as Startime and we don't see any cron expression that has been configure to run the function execution for every 1 minutes ('0 */1 * * * *')

If you are updating the CRON expression via the portal, please ensure that after making the changes, you save the configuration and restart the Function App.

If you are updating the CRON expression locally or through code, please redeploy the function app, then restart it, and verify the behavior.

Should the issue persist, please let me know. We can arrange an offline session to troubleshoot further.

I hope this helps. let me know if you have any further queries. I am happy to assist you!
Vincent Janssen 0 Reputation points

2025-08-12T12:28:15.62+00:00

Thanks for getting back to me!
I didn't notice the first reply on August 1st...
I will try the suggested flow of updating the CRON expression
Anonymous

2025-08-13T08:21:23.46+00:00

Sounds good! Looking forward to your update once you’ve tested it. Let me know if you run into any issues.
Anonymous

2025-08-18T09:44:55.03+00:00

Hi Vincent Janssen, just checking to see if you have a chance to check my previous response and helped, do let me know if you have any further questions on this.
Vincent Janssen 0 Reputation points

2025-08-18T10:58:22.2233333+00:00

I tried the suggested flow of updating the CRON expression.
As far as I could tell it did not work as expected, however I found an alternative solution without the need for a timer function.

Thanks for the help!
Anonymous

2025-08-18T11:07:53.8133333+00:00

Glad to know that you are able to resolve your problem.
Kumar, Harish 0 Reputation points

2025-10-08T00:16:18.6266667+00:00

Hi @Vincent Janssen, Even I'm facing the same issue. We have an Azure Function App (.NET isolated) with a timer trigger scheduled for 11:59 PM daily. The function runs as expected on local, but after deployment to Azure, it only triggers for high-frequency schedules (e.g., every 30 seconds) and does not fire for every 5 minutes or exact times like 11:59 PM.Has anyone faced this issue or have suggestions on what might be causing the timer not to trigger at scheduled times in Azure? All configuration and CRON expressions appear correct, and there are no errors in Application Insights.
How did you solved it ?

Your answer

Anonymous

2025-08-01T13:42:08.5466667+00:00

Hi Vincent Janssen,

Thanks for posting Question in Microsoft Q&A!

Thank you for providing the details regarding the issue. To better understand the behavior and assist you effectively, I’d like to ask a few additional questions

1.Can you please check Application Insights or monitoring and share any logs from the time when the function was supposed to run but didn’t?

2.Which Azure region is the function hosted in?

3.Do you have any Application Settings or 'Always On' enabled? (Consumption Plan doesn’t support Always On, but good to confirm

4.Can you confirm the runtime stack you're using (.NET / Node.js / Python) and the version?

These details will help us narrow down the issue and suggest the most appropriate solution.

Looking forward to your response.
Anonymous

2025-08-12T12:18:36.8133333+00:00

Hi Vincent Janssen,

Thanks for your patience.

Based on the provided Function Invocation ID: "8722a4bb-7ff8-4192-b99c-9a27e78f7701", I have reviewed the backend logs and confirmed that this execution occurred on 2025-07-14 at 11:29 UTC. The configured CRON expression for this invocation is '0,59 * * * * *'.

We have reviewed the logs for more than a day by considering the above invocation as Startime and we don't see any cron expression that has been configure to run the function execution for every 1 minutes ('0 */1 * * * *')

If you are updating the CRON expression via the portal, please ensure that after making the changes, you save the configuration and restart the Function App.

If you are updating the CRON expression locally or through code, please redeploy the function app, then restart it, and verify the behavior.

Should the issue persist, please let me know. We can arrange an offline session to troubleshoot further.

I hope this helps. let me know if you have any further queries. I am happy to assist you!
Vincent Janssen 0 Reputation points

2025-08-12T12:28:15.62+00:00

Thanks for getting back to me!
I didn't notice the first reply on August 1st...
I will try the suggested flow of updating the CRON expression
Anonymous

2025-08-13T08:21:23.46+00:00

Sounds good! Looking forward to your update once you’ve tested it. Let me know if you run into any issues.
Anonymous

2025-08-18T09:44:55.03+00:00

Hi Vincent Janssen, just checking to see if you have a chance to check my previous response and helped, do let me know if you have any further questions on this.
Vincent Janssen 0 Reputation points

2025-08-18T10:58:22.2233333+00:00

I tried the suggested flow of updating the CRON expression.
As far as I could tell it did not work as expected, however I found an alternative solution without the need for a timer function.

Thanks for the help!
Anonymous

2025-08-18T11:07:53.8133333+00:00

Glad to know that you are able to resolve your problem.
Kumar, Harish 0 Reputation points

2025-10-08T00:16:18.6266667+00:00

Hi @Vincent Janssen, Even I'm facing the same issue. We have an Azure Function App (.NET isolated) with a timer trigger scheduled for 11:59 PM daily. The function runs as expected on local, but after deployment to Azure, it only triggers for high-frequency schedules (e.g., every 30 seconds) and does not fire for every 5 minutes or exact times like 11:59 PM.Has anyone faced this issue or have suggestions on what might be causing the timer not to trigger at scheduled times in Azure? All configuration and CRON expressions appear correct, and there are no errors in Application Insights.
How did you solved it ?