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Wikidata restbase requests for HTML content returning 500 for many (newer?) pages/revisions
Open, Needs TriagePublicBUG REPORT

Description

Restbase requests to wikidata for HTML content of wikitext pages (such user pages) fails with HTTP status code 500.

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

What happens?:
HTTP status 500 with an error like this

{"type":"https://mediawiki.org/wiki/HyperSwitch/errors/query_error","title":"Error in Cassandra table storage backend","method":"get","uri":"/www.wikidata.org/v1/page/html/User%3AXXBlackburnXx%2Fsandbox/2170429102"}

What should have happened instead?:

The HTML content should be returned.

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

Last time this worked was apparently on May 7 according to the spamcheck database:

MariaDB [s55543__xlinks_p]> select rev_timestamp from revision, db where rev_db = db_id and db_name='wikidatawiki' order by rev_id desc limit 3;
+---------------------+
| rev_timestamp       |
+---------------------+
| 2024-05-07 09:00:15 |
| 2024-05-07 08:55:28 |
| 2024-05-07 08:54:16 |
+---------------------+
3 rows in set (0.250 sec)