notifier-celery-workers Exited too quickly
log:
OperationalError: database is locked
As the error indicates, please check the access to your database. You can also look in /edx/var/log/supervisor/notifier-celery-workers-stderr.log file for more detailed error traceback.
I apologize my lack of knowledge.
Who can I test the access to the database?
Where is the lock file?
Thank you in advance