on my Moodle instance (Ubuntu 20.04, php 7.4, Moodle 3.10.3) cron jobs are getting stuck:
they just linger there for 30 minutes before getting killed, problem is, users are not getting forum notification because send_user_notifications is stuck here..
I cannot find this job on admin/cli/scheduled_task.php --list to manually trigger it to check for errors. There are no errors in /var/log/cron.log or syslog.
If I set concurrency limit to 1 in admin/settings.php?section=taskprocessing and lifetime to 5 minutes, I cannot see this task/job at all in htop, not poping up even for 1 second.