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Maniphest T423818

Pageviews API returning 404 for 2026-04-17 onward
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Description

The pageviews REST endpoints have no data from 2026-04-17 onward on English Wikipedia, and it looks like the whole dataset for those days is missing.

Repro:

GET /api/rest_v1/metrics/pageviews/top/en.wikipedia/all-access/2026/04/17 → 404

Apr 16 and earlier return 200. Status page shows all operational, so flagging in case a pipeline silently stalled?

I noticed because I created a site that tracks the top page and I didn't get an email about it the last couple days.

https://jpsowin.github.io/wikipop/

Event Timeline

Jpsowin created this task.Apr 19 2026, 4:10 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptApr 19 2026, 4:10 PM
Jpsowin updated the task description. (Show Details)Apr 19 2026, 4:12 PM
Lovepeacejoy404 subscribed.Apr 20 2026, 3:26 AM

Pageviews hasn't worked for 3 days. It's no longer possible to count visits.

MusikAnimal added a project: Pageviews-API.Mon, Apr 20, 8:54 PM
Tenshi_Hinanawi subscribed.Mon, Apr 20, 9:27 PM
mahmoud subscribed.Mon, Apr 20, 11:46 PM

Getting reports for https://top.hatnote.com/ as well. Subbed, looking forward to a fix!

MusikAnimal subscribed.Tue, Apr 21, 4:34 AM

I'm told there was an outage that has now been fixed, and Data Engineering is working to backfill the data.

Johannnes89 subscribed.Tue, Apr 21, 5:04 AM
amastilovic subscribed.Tue, Apr 21, 3:03 PM

We have backfilled the Cassandra jobs that have been failing for the past 3 (now 4) days, would you guys mind taking a look if everything looks fine on your end?

Alien333 subscribed.Tue, Apr 21, 4:42 PM
Jpsowin added a comment.Tue, Apr 21, 5:00 PM

oh yeah looking good now! thank you so much!

Ahoelzl assigned this task to amastilovic.Tue, Apr 21, 10:59 PM
Ahoelzl triaged this task as High priority.
Ahoelzl edited projects, added Data-Engineering (Q4 FS25/26 April 1st - June 30st); removed Data-Engineering.
Ahoelzl moved this task from Next Up to Done on the Data-Engineering (Q4 FS25/26 April 1st - June 30st) board.
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