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App suddenly stopped working

I have two apps and they're both not working. They just keep loading without ending up in errors. In the server log though, I see:

2024-09-05 11:45:00 Thu Sep 5 11:45:00 2024 - received message 0 from emperor

2024-09-05 11:45:00 SIGINT/SIGTERM received...killing workers...

2024-09-05 11:45:34 uwsgi_master_manage_emperor()/read(): Bad file descriptor [core/emperor.c line 2442]

2024-09-05 11:45:34 lost connection with my emperor !!!

2024-09-05 11:45:34 VACUUM: unix socket /var/sockets/www.imagoenglish.com.br/socket removed.

Thanks for letting us know! It looks like after our system maintenance this morning, some SQLite databases were stuck in a "locked" state where processes would hang when they tried to access them. We just restarted the file locking service on the file server associated with your account, and your sites are up and running now, so we think that was probably the cause of the issues you were seeing.

As an aside: we do strongly recommend against using SQLite for production websites. it's a great database for development environments and early-stage testing, but for anything customer-facing we'd recommend using MySQL or Postgres.