Timer function returns 404 from both postman and Az Portal test/run. Http function executes from Postman and from Az Portal test/run, OK. App is deployed from GitHub Action. I have used Restart and Refresh but cron job does not fire. Publishing model: Code Runtime Stack: .NET - v6.0 Runtime: ~4 Not set WEBSITE_TIME_ZONE CRON expression: "0 6 * * *" Plan Type: App Service plan Operating System: Windows SKU and size: Dynamic Y1 Log of Deployment: ... Triggering recycle (preview mode disabled). Deployment successful.

nCRON is NOT the same as CRON expressions. CRON expressions work in debug local development, but do NOT work in Azure Portal. Upgrade expression to satisfy these rules with SIX space seperated digits/sub-expressions : nCRON JOB DATA: Each cronjob has the following syntax: * * * * * * - - - - - - | | | | | | | | | | | +--- day of week (0 - 6) (Sunday=0) | | | | +----- month (1 - 12) | | | +------- day of month (1 - 31) | | +--------- hour (0 - 23) | +----------- min (0 - 59) +------------- sec (0 - 59) More details here: https://github.com/atifaziz/NCrontab MSLearn Azure Function nCron examples : 0 5 * * * * //Once every hour of the day at minute 5 of each hour

Timer Function returns 404 on consumption plan. cronjob but http fn invokes ok

ozbobwa 21

Timer function returns 404 from both postman and Az Portal test/run.

Http function executes from Postman and from Az Portal test/run, OK.

App is deployed from GitHub Action. I have used Restart and Refresh but cron job does not fire.
Publishing model: Code
Runtime Stack: .NET - v6.0
Runtime: ~4
Not set WEBSITE_TIME_ZONE
CRON expression: "0 6 * * *"
Plan Type: App Service plan
Operating System: Windows
SKU and size: Dynamic Y1

Log of Deployment:

...
Triggering recycle (preview mode disabled).
Deployment successful.

JananiRamesh-MSFT 25,816 Reputation points

2024-07-09T11:51:45.72+00:00

@ozbobwa Thanks for reaching out. Can you please share your timer trigger code and host.json file as well to review function specific configurations

https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer?tabs=python-v2%2Cisolated-process%2Cnodejs-v4&pivots=programming-language-csharp

ozbobwa 21

Code samples below.

Sending the body {} via Postman is successful to a localhost URL: http://localhost:7062/admin/functions/TestTimer

Time job:

using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;
using System.Threading.Tasks;  

namespace tests {

using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;
using System.Threading.Tasks;

namespace Tests
{
    public class TestTimer
    {

        public TestTimer() { }

        [FunctionName("TestTimer")]
        public async Task TestTimerTask(
            [TimerTrigger(            
            // Once every hour of the day at minute 6 of each hour
            // ref: https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer?tabs=python-v2%2Cisolated-process%2Cnodejs-v4&pivots=programming-language-csharp#ncrontab-expressions
            "0 6 * * *"
#if DEBUG
            , RunOnStartup=true
#endif
            )] TimerInfo timerInfo,
            ILogger log
            )
        {
            log.LogInformation("TestTimer - START");
            await Task.Delay(1000);
            log.LogInformation("TestTimer - END");
        }
    }
}

host.json

{
    "version": "2.0",
    "logging": {
        "applicationInsights": {
            "samplingSettings": {
                "isEnabled": true,
                "excludedTypes": "Request"
            },
            "enableLiveMetricsFilters": true
        }
    }
}

Another attempt to use 'Test/Run' in the Portal AzFn, using this body, resulted again in 404:

{
    "Schedule":{
        "AdjustForDST": true
    },
    "ScheduleStatus": {
        "Last":"2016-10-04T10:15:00+00:00",
        "LastUpdated":"2016-10-04T10:16:00+00:00",
        "Next":"2024-07-10T05:04:00+00:00"
    },
    "IsPastDue":true
}

JananiRamesh-MSFT 25,816 Reputation points

2024-07-18T07:18:54.3433333+00:00

@ozbobwa Thanks for sharing the additional information, Apologies for the delay I was on vacation. I tried with default timer trigger code, and it works fine even if I pass the Json body

But I am unable to repro with the code that you shared could you please also share me your program.cs and startup.cs file and the reference document that you followed to create this timer trigger.

It is not necessary to pass a body when testing a timer trigger function. The timer trigger function will be triggered automatically based on the schedule defined in the function code. could you please also let me know the purpose of posting a body to timer trigger and your actual requirement.
ozbobwa 21 Reputation points

2024-08-02T05:57:36.9833333+00:00

if you simply put a 5 digit cron job instead of a 6 digit Ncron job, it 404's
ozbobwa 21 Reputation points

2024-08-06T01:18:33.7+00:00

@JananiRamesh-MSFT to replicate the 404 take the project from here: https://github.com/OzBob/azfninproctimer

Deploy and publish it to Azure Portal using the ARM template: https://github.com/OzBob/azfninproctimer/tree/main/ARM

Navigate to BadCron job and Test/Run+Run

I hand edited the ARM template has my AzFn unique name, so you will need to edit it yourself or just use the Azure Portal wizard and choose the same settings: Y1 win 32bit .net6 inprocess AzFn
ozbobwa 21 Reputation points

2024-08-13T03:34:37.6466667+00:00

more users have the CRON vs nCRON issue. https://stackoverflow.com/questions/67867949/azure-function-timer-trigger-api-management-manual-execution-returns-404
ozbobwa 21 Reputation points

2024-08-16T00:52:47.17+00:00

PR lodged in Timer docs repo: https://github.com/MicrosoftDocs/azure-docs/pull/124142

Hopefully a more meaningful error message can be provided in the Azure Function response when the NCRONTAB expression is invalid

1 answer

ozbobwa 21 Reputation points

2024-07-23T02:31:52.0933333+00:00
nCRON is NOT the same as CRON expressions.

CRON expressions work in debug local development, but do NOT work in Azure Portal.

Upgrade expression to satisfy these rules with SIX space seperated digits/sub-expressions :

nCRON JOB DATA: Each cronjob has the following syntax: * * * * * * - - - - - - | | | | | | | | | | | +--- day of week (0 - 6) (Sunday=0) | | | | +----- month (1 - 12) | | | +------- day of month (1 - 31) | | +--------- hour (0 - 23) | +----------- min (0 - 59) +------------- sec (0 - 59) More details here: https://github.com/atifaziz/NCrontab

MSLearn Azure Function nCron examples:

0 5 * * * * //Once every hour of the day at minute 5 of each hour
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ozbobwa 21 Reputation points

2024-08-02T01:25:46.4666667+00:00

Now it should be easier to replicate the 404:

take the project from here: https://github.com/OzBob/azfninproctimer

Deploy and publish it to Azure Portal using the ARM template: https://github.com/OzBob/azfninproctimer/tree/main/ARM

Navigate to BadCron job and Test/Run+Run

I hand edited the ARM template to remove my SubscriptionId, you can substitute in your own or just use the contents of the ARM json to replicate it.
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Timer Function returns 404 on consumption plan. cronjob but http fn invokes ok

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