For me this was because Gwibber had a SQLLite file with a journal. By deleting ~/.config/gwibber/gwibber.sqlite-journal I was able to stop getting this bug. Gwibber needs to learn how to apply that and recover though :-)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/741035 Title: gwibber-service crashed with OperationalError in maintenance(): database is locked To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gwibber/+bug/741035/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
