The 1.39.0-wmf.16 version of MediaWiki is blocked[0].
The new version is currently being deployed to testwikis, but can
proceed no further until this issue is resolved or triaged as irrelevant:
* Investigate McRouter GET request spike from wmf.15
-
https://phabricator.wikimedia.org/T310532
Once these issues are resolved train can resume.
Thank you for your help resolving these issues!
-- Your humble train toilers
[0].
https://phabricator.wikimedia.org/T308069
[1].
https://versions.toolforge.org/