Starting September 1, huwiki and arwiki, which both take several days to complete the revsion history content dumps, will be moved to the 'big wikis' list, meaning that they will run jobs in parallel as do frwiki, ptwiki and others now, for a speedup.
Please update your scripts accordingly. Thanks!
Task for this: https://phabricator.wikimedia.org/T202268
Ariel