Job was not scheduled - Bug?

[mmodler]

Hi & happy new year,

i have a job which should run every day at 8:05 UTC. The last days, it did not run one day. I first thought the cron was the problem, but everything was fine. It looks like the scheduler midded to schedule it:

2017-12-25T07:45:38+00:00 DEBUG (7): Generated schedule. Newest task is scheduled at "2017-12-25 08:00:00". (Duration: 0.59 sec)

Ok, so i would expect the scheduler himself to work again at 8:00 to create the schedule for 8:05. But at 8:00 many jobs where running, but no schedule generation.

Then:

2017-12-25T08:05:02+00:00 DEBUG (7): Generated schedule. Newest task is scheduled at "2017-12-25 08:20:00". (Duration: 0.49 sec)
2017-12-25T08:05:02+00:00 DEBUG (7): History cleanup (Duration: 0.03 sec)

No other tasks run at 8:05 - which is obvious because they have never been scheduled for 8:05? How could this happen?

[MTindev]

Hello,

Did you find a solution @mmodler ?

Same issue for me.
The main cron is sheduled to run every 5 minutes.
The configuration is set to generate tasks every 15 minutes for the next 20 minutes (ahead). This is the common Magento configuration.

In my case :

2021-01-28T09:50:28+00:00 DEBUG (7): Generated schedule. Newest task is scheduled at "2021-01-28 10:05:00". (Duration: 0.15 sec)
2021-01-28T10:10:01+00:00 DEBUG (7): Generated schedule. Newest task is scheduled at "2021-01-28 10:25:00". (Duration: 0.2 sec)
2021-01-28T10:25:26+00:00 DEBUG (7): Generated schedule. Newest task is scheduled at "2021-01-28 10:40:00". (Duration: 0.15 sec)

In this way, no task have been generated at 10:10.

And this behaviour creates a big issue, because each hour almost one "5 min. occurrence" is not scheduled and that forgets (often) processes that are expected to be executed only one time in the day, and they finally are not executed at all.