Azure function timer trigger not properly executing on CRON expression

Question

I am using azure timer trigger function for triggering every 15 minutes in a day. So I set the time in TimerTrigger->Integrate->Schedule as 0 */15 * * * *. But the function is executing on every 5 minutes.

Is any problem in given CRON expression?

0 */15 * * * * is correct and I see function executes every 15m. Might be a silly suggestion but have you clicked Save after modifying the schedule? — Jerry Liu
– Jerry Liu, Commented Feb 15, 2019 at 2:49
Looks like the function is consuming the old code(template is 5m). Just in case, have you tried the steps like refreshing(button next to functionapp), restarting or deleting and recreating? — Jerry Liu
– Jerry Liu, Commented Feb 15, 2019 at 6:09
You mean after updating the Shedule time, then restart the function, right? — JINESH
– JINESH, Commented Feb 15, 2019 at 6:13
Yes. But function runtime is supposed to reload the file changes automatically without any manual steps. Not sure what goes wrong on your side. — Jerry Liu
– Jerry Liu, Commented Feb 15, 2019 at 6:17

Llazar · Accepted Answer · 2019-02-15 17:49:10Z

1

Your expression is wrong.

Try these

0 */15 * ? * * // every 15 minutes starting at minute :00, of every hour

* 0/15 0 ? * *  //every 15 minutes starting at minute :00

You can test it in cron generator

edited Feb 15, 2019 at 17:49

answered Feb 14, 2019 at 17:55

Llazar

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4 Comments

Llazar Over a year ago

You can check them in the link on the post cron generator.

Llazar Over a year ago

I edited my answer you can test them in freeformatter.com/cron-expression-generator-quartz.html

AndyMan Over a year ago

That cron generator link you provided, only allows for 7 characters, when I run that in Azure it throws an error, the default is 5 characters when you create a new timertrigger. So I'm confused on proper format of these exprssions. I've seen examples with 4 and some with 6, what is correct?

Llazar Over a year ago

@AndyH cron expression isn't azure only.

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