Well, Quarry ignores queries on the lost time in recentchanges table, but has all the data in revision table.

There is a script called rebuildrecentchanges.php, but it would need some adjustments to work on a time range (right now it clears all recentchanges data and rebuilds it from scratch, which takes a long time and also would lose any patrolling information for older changes).

So, it will be OK!

I've updated this task with some of the information from @mark's email to the engineering list.

Well, I made the list of missing edits, and they are not unmarked!

Change 284248 had a related patch set uploaded (by Bartosz Dziewoński):
[WIP] rebuildrecentchanges: Allow rebuilding specified time range only

https://gerrit.wikimedia.org/r/284248

Change 284248 merged by jenkins-bot:
rebuildrecentchanges: Allow rebuilding specified time range only

https://gerrit.wikimedia.org/r/284248

Should probably find out what the exact time range is, to avoid missing anything or duplicate RC entries for some actions.

You know, @matmarex, there can be a chance that the range finished in different time on different wikis.

I don't think so, but different mw servers would've got the fix at slightly different times.

In T133053#2219419, @matmarex wrote:

Should probably find out what the exact time range is, to avoid missing anything or duplicate RC entries for some actions.

The full range is 2016-04-19T14:47:41Z - 2016-04-19T15:10:18Z

Change 284274 had a related patch set uploaded (by Ori.livneh):
rebuildrecentchanges: Allow rebuilding specified time range only

https://gerrit.wikimedia.org/r/284274

Change 284274 merged by Ori.livneh:
rebuildrecentchanges: Allow rebuilding specified time range only

https://gerrit.wikimedia.org/r/284274

Change 284347 had a related patch set uploaded (by Aaron Schulz):
RebuildRecentchanges improvements

https://gerrit.wikimedia.org/r/284347

To actually view these 20 minutes of changes that will need reviewing, try viewing a page like this:

https://commons.wikimedia.org/w/index.php?title=Special:RecentChanges&hideliu=0&hideanons=0&hidebots=1&hideWikibase=1&hideReviewed=1&hidepatrolled=1&limit=5000&from=20160419144400

(substitute "commons.wikimedia.org" for your wiki; the additional query parameters are to hide boring changes) …scroll to the bottom, and look at the changes in the affected period (14:48 - 15:10 UTC).

Unfortunately, Special:RecentChanges can show only 5000 changes, and on very active wikis (e.g. English Wikipedia), this might already be outside the limit :( I'm not sure what to do there, they can probably be queried via the API somehow…

Pay attention that all restored changes are unmarked, even those of sysops.

Emailed wikitech-ambassadors: https://lists.wikimedia.org/pipermail/wikitech-ambassadors/2016-April/001393.html

(Also, for future reference: what exactly was the config problem and what was the fix? Anyone has a link handy?)

Change 284347 merged by jenkins-bot:
RebuildRecentchanges improvements

https://gerrit.wikimedia.org/r/284347