Cause of the delay in reloading crontab?

Hi

We have a script that tries to scan the etc/crond directory, populate crontab file and compares it with the crontab file that supercronic uses to schedule, when there are changes tries reload the crontab.

When we try to reload the cron tab by using the below command, we notice a delay between the time the command is issued to reload the crontab and the read crontab .

kill -USR2 $pid

Please help to understand the cause for the delay? Do we have any options to avoid this delay? As this seem to cause the minutely jobs to skip an iteration due to the delay during reload time.

Mar 13 09:39:00 supercronic: time="2024-03-13T09:39:00Z" level=info msg=starting iteration=0 job.command="populate_and_load_crontab_from_etc_crond.sh" job.position=0 job.schedule="* * * * *"
Mar 13 09:39:50 supercronic: time="2024-03-13T09:39:50Z" level=info msg="received user defined signal 2, reloading crontab"
Mar 13 09:39:50 supercronic: time="2024-03-13T09:39:50Z" level=info msg="job succeeded" iteration=0 job.command="populate_and_load_crontab_from_etc_crond.sh" job.position=0 job.schedule="* * * * *"
Mar 13 09:40:27 supercronic: time="2024-03-13T09:40:27Z" level=info msg="read crontab: "

Thanks

Start by tracing how the SIGUSR2 reload is handled and how the crontab read is scheduled, using the provided log timestamps to compare signal receipt, job completion, and reload completion. Done means identifying the source of the delay and documenting whether reload behavior can prevent a minutely job from skipping an iteration.

Written by the indexing model from the issue text.