Last modified: 2014-10-03 07:13:35 UTC
In some cases, a non-trivial subset of the recipients receives a message twice (usually in the same minute): see example in URL. This might have to do with replag and/or job queue problems and/or something else, because something similar happens in TranslationNotifications as well (bug 69940).
This appears to be because we aren't de-duping redirects: https://ba.wikipedia.org/w/index.php?title=%D2%A0%D0%B0%D1%82%D0%BD%D0%B0%D1%88%D1%8B%D1%83%D1%81%D1%8B_%D0%BC%D0%B5%D0%BD%D3%99%D0%BD_%D2%BB%D3%A9%D0%B9%D0%BB%D3%99%D1%88%D0%B5%D2%AF:HaqmarBot&redirect=no so two messages were sent.