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/