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We have two setting for Procrastination tasks:
queueing_lock
- this blocks spam of tasks in queue. It allows only one task with statustodo
. This means that in DB at any time can be one(doing
) or two tasks(doing
+todo
).lock
- forbidden only onedoing
task in any time.If we use:
Only
queueing_lock
will stoptodo
task spam. But we will have 2 executing same tasks.Only
lock
will have only one executing of some kind task, but will havetodo
task spam.queueing_lock
+lock
gives as optimal result we have no spam in task queue and always only one executing task.Now about problem: Logic of working lock pretty simple if task with status
doing
exists is skips start of executing new one. And this leas to "dead" task after server restart. Worker killed, statusdoing
and new execution will never start.This is significant issue that need to be discus. For that reason I have created this MR as draft.