Quartz net - Not working as expected

Question

I have used the Quartz net expression for the following scenario that Schedule should run every 40 seconds.

I have added the expression like following.

0/40 * * * * ?

I expected this to run on every 40 seconds. Instead of that, it runs like, for the 40th seconds it runs, then it runs when next minutes starts.

Answer 1

I do not know the specifics of Quartz.net but your understanding of what a cron expression does is wrong.

The / syntax specifies an increment in the period selected and not a repeat. So you are effectively asking for a job to run at second 0 and second 40 of every minute of every hour of ...

Given what you want, you should use a simple trigger with a repeat interval.