We've reached the point in deployment of the Multi-Content Revisions
changes where we're turning off the writing of data to deprecated fields.
In particular, rev_text_id and ar_text_id will be 0 in all revisions, and
rev_content_model, rev_content_format, and corresponding fields in the
archive table will always be null.
This has been the case on testwiki since October 29, and on the remaining
group 0 wikis since a few minutes ago. Assuming no issues turn up, we plan
to roll it out to group 1 on Thursday and group 2 early next week.
If you find any MediaWiki bugs that seem as if they might be related to
this change, please file them in Phabricator and tag #Core-Platform-Team.
Thanks!
--
Brad Jorsch (Anomie)
Senior Software Engineer
Wikimedia Foundation