Scheduled Job wrong scheduling

[a.slyzhko]

Hi! I have a custom scheduled job. Here is a cron I have set for it "0 10 */2 * 1-5"
As label says, it should run every 2 days, but actually it runs every day. Am I missconfigured something or cron is wrong?
EspoCRM ver. 8.1.1, php 8.3, ubuntu 22.04

[yuri]

Hi,

We use cron-expression library that determines when to run a job the next time. https://github.com/espocrm/espocrm/b...essor.php#L148

Better specify exact days using comma. Your expression is ambiguous.

[a.slyzhko]

I changed cron expression to '0 10 */2 * 1,2,3,4,5'
And it scheduled next run for tomorrow. So there are 2 problems. 1 - it runs every day (but should every 2 day). 2 - it doesn't follow working days rule

[ThomasB]

I'm not really good at reading code about the included versions. So you include versions of cron-expression starting with 3.0`?

Latest version is 3.3.3

Change log has some fixes regarding time and time zones.

https://github.com/dragonmantank/cron-expression/blob/master/CHANGELOG.md

[yuri]

Why just not using "0 10 * * 1,3,5" notation, to prevent ambiguously between days of week, and 2-day interval. There are 7 days per week, 7 is not even number.

[a.slyzhko]

I didn't think about this way. It works, many thanks!

[yuri]

Note that the label does not give 100% guarantee that it will work exactly as it says. These are handled by different libs, backend and frontend.

[yuri]

Commend from the discussion on the cron-expression repository:

"The important thing to note (which isn't readily apparent) is that Day of Week and Day of Month combine their results when both are specified, which is how the original C implementation is designed. ... So the important thing to note in the translation is the and on Monday ... so you will run every day of 1-7 of the month, and all Mondays. This trips up a lot of people."