The XML database dumps are missing all through May, apparently because of a memory leak that is being worked on, as described here, https://phabricator.wikimedia.org/T98585

However, that information doesn't reach the person who wants to download a fresh dump and looks here, http://dumps.wikimedia.org/backup-index.html

I think it should be possible to make a regular schedule for when these dumps should be produced, e.g. once each month or once every second month, and treat any delay as a bug. The process to produce them has been halted by errors many times in the past, and even when it runs as intended the interval is unpredictable. Now when there is a bug, all dumps are halted, i.e. much delayed. For a user of the dumps, this is extremely frustrating. With proper release management, it should be possible to run the old version of the process until the new version has been tested, first on some smaller wikis, and gradually on the larger ones.