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At around 2015-04-08 12:25:34 UTC, S2 slaves encountered (SiteStatsInit::edits and SiteStatsInit::articles query storm) and S2 wikis started returning errors. The slaves' event schedulers started killing slow queries after 5min and by 2015-04-08 12:35:34 things returned to normal.


This happened a year or so ago and led to . Something else has since broken allowing these to run as wikiuser from the web, and not a maintenance script or job.