Working installation with running cron jobs and no errors in debug log
Working installation with running cron job, but every time the jobs are run, a main.DEBUG: cache_invalidate: is thrown.
The way I see it, there are two ways to fix it. Code it in a way so that "notifications" (which is what this seems like) are not reported in the debug log, or create a notification.log where things like this can be written. On a side note, it would be nice to have some automated way to clear these logs.