Hi,
For about a week MediaWiki Codesearch was serving outdated and incomplete results (and later partially down outright) because of a full disk. This has been fixed now, you may wish to re-run searches as necessary.
The full disk was accidentally caused by switching between gerrit and gerrit-replica (as previously discussed on this list)[1][2], so I deleted all the old gerrit-replica repository copies and also added ~20G more disk space to the instance. Monitoring did correctly pick up that there was some issue once the disk was full, it just wasn't properly examined because of hackathon travel / activities.
[1] https://phabricator.wikimedia.org/T336710#8877525 [2] https://phabricator.wikimedia.org/T337263
-- Kunal / Legoktm