On Sun, 3 Apr 2022, at 17:57, Strainu wrote:
Hi,
I've recently seen some complaints from 2 users located in the same country that it
takes about half a day for the Javascript changes to propagate. Users from different
countries but similar user rights don't seem to have this problem.
Is it possible to have different cache invalidation rules for different countries? If
not, what else could cause this behavior?
It depends on what kind of changes and to what piece of JavaScript code.
My guess would be that this is a change not to deployed software or gadgets or site
scripts, but a user script. And that the user script is loaded by URL via importScriptURI
or mw.loader.load. And that the URL is non-standard (e.g. not exactly
/w/index.php?title=..&action=raw&ctype=text/javascript, but with other parameters
or different order or different encoding). This means that it is not purged on edits.
In that case, it will stay cached. It might then be that someone near one data center is
lucky that the URL is not used there before and sees no cache. Or that near another data
center the URL is not popular enough to stay in the CDN and thus falls out before the 7
day expiry despite no observed edit or purge.
To know for sure, I would need to see the specific script edit and how the script is
loaded.
-- Krinkle