Page MenuHomePhabricator
Create Task
Maniphest T425861

Wikidata SPARQL query performance regression: frequent 502-bad gateway errors
Closed, ResolvedPublicBUG REPORT
Actions

Description

Steps to replicate the issue (include links if applicable):

  • Execute any SPARQL query either via the frontend (https://query.wikidata.org) or via the API-backend that wasn't cached previously. This can appears to affect any query, simple or complex.

What happens?:
Since 1 or 2 days (2026-05-07 or 2026-05-07) even very simple queries time out or get a bad gateway (HTTP 502) response.

What should have happened instead?:
Get a response without 502-error and no timeouts on simple queries.

Bildschirmfoto vom 2026-05-09 19-55-44.png (1,694×989 px, 105 KB)

Related Objects

Event Timeline

Nylki created this task.May 9 2026, 5:52 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMay 9 2026, 5:52 PM
Nylki updated the task description. (Show Details)May 9 2026, 5:53 PM
Nylki updated the task description. (Show Details)
Nylki renamed this task from Wikidata SPARQL query performance regression: frequent 502-errors and unusual timeouts to Wikidata SPARQL query performance regression: frequent 502-bad gateway errors.May 9 2026, 5:56 PM
Nylki updated the task description. (Show Details)
Bugreporter triaged this task as Unbreak Now! priority.May 9 2026, 5:57 PM
Bugreporter subscribed.

See T421642: Pywikibot reports maxlag retry error and T425758: Investigate rdf-streaming-updater consumer failures in eqiad.

Nylki added a comment.May 9 2026, 6:02 PM
In T425861#11905134, @Bugreporter wrote:

See T421642: Pywikibot reports maxlag retry error and T425758: Investigate rdf-streaming-updater consumer failures in eqiad.

I see, thanks.
Btw: https://www.wikimediastatus.net currently still says "all systems operational", perhaps this should be updated.

Maintenance_bot added a project: Wikidata.May 9 2026, 6:29 PM
HakanIST subscribed.May 10 2026, 7:20 AM
William_Avery subscribed.May 10 2026, 12:01 PM
Jcmoissinac subscribed.May 10 2026, 6:10 PM
Kline subscribed.May 10 2026, 6:59 PM
Shisma subscribed.May 10 2026, 7:21 PM
hodgers subscribed.May 10 2026, 11:09 PM
Yirba subscribed.May 11 2026, 7:28 AM
Epidosis subscribed.May 11 2026, 8:40 AM
JAnD subscribed.May 11 2026, 8:53 AM
Novem_Linguae subscribed.May 11 2026, 11:13 AM
Jane023 subscribed.May 11 2026, 11:14 AM
Riinupius subscribed.May 11 2026, 2:46 PM
Riinupius unsubscribed.
Jakob_WMDE added a project: Wikidata Platform Team.May 12 2026, 9:23 AM
Saiphani02 subscribed.Thu, May 14, 4:23 PM
Bodhisattwa subscribed.Thu, May 14, 4:48 PM
HakanIST added a comment.Sat, May 16, 3:16 PM

Still seeing IllegalArgumentException from out-of-range coordinates in wikibase:box queries. One relatively low-effort improvement might be validating coordinate bounds at the proxy layer before queries reach Blazegraph.

Nylki added a comment.Sat, May 16, 5:48 PM

@HakanIST Hm, did you perhaps mean to comment in a different ticket? Not sure this is related. In fact I'd close this one, as the incident ( T425758 ) has been resolved.

HakanIST added a comment.Sat, May 16, 8:33 PM
In T425861#11928374, @Nylki wrote:

@HakanIST Hm, did you perhaps mean to comment in a different ticket? Not sure this is related. In fact I'd close this one, as the incident ( T425758 ) has been resolved.

you're right, glad it's resolved

Nylki closed this task as Resolved.Mon, May 18, 1:49 PM
Nylki claimed this task.
Content licensed under Creative Commons Attribution-ShareAlike (CC BY-SA) 4.0 unless otherwise noted; code licensed under GNU General Public License (GPL) 2.0 or later and other open source licenses. By using this site, you agree to the Terms of Use, Privacy Policy, and Code of Conduct. · Wikimedia Foundation · Privacy Policy · Code of Conduct · Terms of Use · Disclaimer · CC-BY-SA · GPL · Credits