I added a new job in Jenkins, which I want to schedule periodically.
From Configure job, I am checking the "Build Periodically" checkbox and in the Schedule text field added the expression:
15 13 * * *
But it does not run at the scheduled time.
Is it the correct procedure to schedule a job?
The job should run at 4:20 AM, but it is not running.
By setting the schedule period to 15 13 * * *
you tell Jenkins to schedule the build every day of every month of every year at the 15th minute of the 13th hour of the day.
Jenkins used a cron expression, and the different fields are:
If you want to schedule your build every 5 minutes, this will do the job : */5 * * * *
If you want to schedule your build every day at 8h00, this will do the job : 0 8 * * *
For the past few versions (2014), Jenkins have a new parameter, H
(extract from the Jenkins code documentation):
To allow periodically scheduled tasks to produce even load on the system, the symbol
H
(for “hash”) should be used wherever possible.For example, using
0 0 * * *
for a dozen daily jobs will cause a large spike at midnight. In contrast, usingH H * * *
would still execute each job once a day, but not all at the same time, better using limited resources.
Note also that:
The
H
symbol can be thought of as a random value over a range, but it actually is a hash of the job name, not a random function, so that the value remains stable for any given project.