Doesn’t seem to be specific to Wikidata – https://logstash.wikimedia.org/goto/2e673c3e690194a2f98280393e7975c4 shows >100k occurrences of the error, but mainly on Wikipedias. (It’s also very “spike-y”.)

(Note: The above logstash link is based on the mediawiki-errors backlog, but these messages don’t actually end up on an error channel – I removed that filter.)

Questions to think about:

• When looking for the normalized message across mediawiki-errors Logstash dashboard, does it affect specific domains, hosts, data centers, or {module} values more than others?
• How long do the peaks last?
• Does it have literally zero ocurrences outside the peaks, or is there a continuous trickle at a lower level as well?
• Do the peaks happen at a regular interval?
• Do the recurring peaks align with any recurring SAL entries?