All of the last 15 global renames got stuck on metawiki (or never even scheduled there, there are no relevant logs, neither errors nor the rename start message). Running `fixStuckGlobalRename.php` on meta works fine.
The last successful non-CLI rename on meta [[https://logstash.wikimedia.org/goto/eefd5dc5925a12c135cf53b53fe321bf|was at]] 2018-04-26T15:24:07, the next one [[https://logstash.wikimedia.org/goto/e2de83f58e90a111987e671448f72f39|should have been]] around 18:00 but did not get triggered. The only possibly relevant [[https://tools.wmflabs.org/sal/production?d=2018-04-26|SAL event]] in that time frame is [[https://gerrit.wikimedia.org/r/c/428970/|428970: Enable all jobs for test, test2, testwikidata and mediawiki]]. mediawikiwiki directly precedes metawiki, and rename jobs run in a chain (a successful job schedules the job for the next wiki) so maybe that breaks with Kafka somehow ([[https://github.com/wikimedia/mediawiki-extensions-CentralAuth/blob/master/includes/LocalRenameJob/LocalRenameJob.php#L154|job scheduling from `LocalRenameJob::scheduleNextWiki`]] fails).
See https://wikitech.wikimedia.org/wiki/Stuck_global_renames for the workaround.