Rather than needing to dig these out of Hadoop it would be easier if we logged these to logstash.
The service-runner provides a configured logging object which will write to logstash. We should use this to log the failed requests for:
- Special:EntityData
- Messages
- ContentLanguages
Note: abnormally long-running requests are not to be additionally logged
- maybe use a log channel like Wikibase.TermboxSSR. c.f. Wikibase.NewItemIdFormatter extensions/Wikibase/repo/WikibaseRepo.datatypes.php:383
- look into https://gerrit.wikimedia.org/r/plugins/gitiles/wikibase/termbox/+/master/src/server/app.ts#63 ff.