Michael added a comment.
In T294862#7546024 <https://phabricator.wikimedia.org/T294862#7546024>, @Krinkle wrote: > @Michael The error seems to be a logic problem in the client-side JavaScript code about an undefined function. If I understand correctly, you suspect this is a (normal?) side-effect in the Termbox JS code when it receives bad data or an error from the server. Is that right? Not "normal" in the sense of "intended" or "known" or "acceptable". I merely noticed that: 1.: the error seems to be spread out across many users, 2.: it seems to not follow the normal usage intensity curve 3.: it also appears on "core" entities, for example Q5: "human" So I assume that //some// additional factor is needed for this error to happen, otherwise I would expect it to be occurring much more evenly across the day and not as "spikey". SSR is just one speculation, I'm more than happy to hear other ideas. I'm not yet as familiar with the Termbox code itself to have a more specific hunch as to what it could be. Your comment provoked me to look at Logstash again and this at a bit longer timescale, and what I found is indeed interesting: F34822057: image.png <https://phabricator.wikimedia.org/F34822057> The errors seem to have started occurring //much// more often from Oct 31 onward. That would match the rollout of 1.38.0-wmf.7, right? I'll have a look around to see if anything sticks out in particular. TASK DETAIL https://phabricator.wikimedia.org/T294862 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Michael Cc: Krinkle, Michael, Manuel, Aklapper, Masumrezarock100, nray, Invadibot, maantietaja, Akuckartz, darthmon_wmde, Rosalie_WMDE, Nandana, lucamauri, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, Verdy_p, Wikidata-bugs, aude, Lydia_Pintscher, Jdforrester-WMF, Addshore, Mbch331, Jay8g
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