Prior to this change, the tool_task_cronrunning check had very tight
limits for checking the last cron interval and comparing it to the
expected frequency. When a cron job should take 1:00 min and the last
run was 1:02 min it complained that there was 1:02 between the last two
runs of the cron maintenance script and it should run every 1:00.
This change makes the check a bit more relaxed and adds an additional
minute on top of the expectedfrequency to give the cron job some time.
Signed-off-by: Daniel Ziegenberg <daniel@ziegenberg.at>
Centralise management of all types of cron tasks with registration, scheduling,
parallel task conflicts(blocking) and running once off tasks, all using an
administration screen.
This is a combination of several issues:
MDL-25502: Added "black magic" task allocator for cron
MDL-25503: Add step to cron to run all scheduled tasks
MDL-25504 cron: Refactor to use scheduler
MDL-25505: Add an admin interface to schedule tasks via cron.
MDL-25507: Add support for adhoc tasks.
Daniel Ziegenberg