5 Web nodes, 2 HA NFS nodes, and a custer of 3 DB nodes. Locking has been moved into Redis.
Only one server is running the crontab job, that same that has the volume for backups mounted.
While everything has working ok, the automated backups failed.
Even running by shell fails:
[root@MoodleWeb1 moodle]# sudo -u apache php admin/tool/task/cli/schedule_task.php --execute=\\core\\task\\automated_backup_task
Execute scheduled task: Cópias de segurança automáticas (core\task\automated_backup_task)
Cannot obtain task lock
Any ideas what can be wrong?