Jenkins jobs not running as per the cron schedule

darshanky 2020-11-02 23:28:42 UTC #1

Keywords: Jenkins - AWS - Technical issue - Other
Description:
Hello,

We have quite a few periodic builds that run every night at around 1 AM. The build generates few files and those files will be picked by some third-party integrations (Used by some other organization). The third-party integration looks for this file and picks it up at around 1:30 AM for further processing. From the last few days, we noticed that the periodic builds are delayed by an hour which is causing some issues with the third-party integration jobs.

The cron expression is:

0 1 * * *

We tried to change the cron expression to distribute the load equally

H 1 * * *

Any suggestions on this, please?

davidg 2020-11-03 10:54:10 UTC #2

Hello @darshanky,

You could try this expression to run it one hour before:

0 0 * * *

I recommend using this tool to debug the cron schedule expressions:
https://crontab.guru/

I hope it helps

darshanky 2020-11-03 22:35:02 UTC #3

Hello @davidg

Thank you for your reply. I appreciate it. We have some timing requirements and the job should run around 1 AM in the morning. Sometimes the job gets delayed by more than one hour and thus running it at midnight might not help but surely a possible option if the job gets delayed exactly by one hour. Thank you for the crontab guru link.

Regards,
Darshan

davidg 2020-11-04 10:27:09 UTC #4

If the issue is related to the time when the builds start, I would recommend checking the hour is the same in both machines?

If the builds start at the desired time but they are taking longer to finish, I would add some debug in the cronjobs to know when they start and when they finish in order to get more info about the delay.

Regards

system 2020-11-18 10:27:14 UTC #5

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