https://wikidata.beta.wmflabs.org/w/api.php?action=query&titles=MediaWiki&maxlag=-1
{ "error": { "code": "maxlag", "info": "Waiting for kuwikiquote: 17289.733333333 seconds lagged.", "host": "kuwikiquote", "lag": 17289.733333333, "type": "wikibase-dispatching", "dispatchLag": 1037384, "*": "See https://wikidata.beta.wmflabs.org/w/api.php for API usage. Subscribe to the mediawiki-api-announce mailing list at <https://lists.wikimedia.org/mailman/listinfo/mediawiki-api-announce> for notice of API deprecations and breaking changes." }, "servedby": "deployment-mediawiki-09" }
This is causing some failures on pywikibot tests (T201981).
The first pywikibot build failing because of this error appears to be build #5102, 2018-08-03 where maxlag was still 990.95s, but the lag gradually increased and it's currently over 17289s.