There are several recent threads about thumbnail cache purging issues.
Some currently still miss more information and this could turn out to be more than one problem, but listing them here:
- https://en.wikipedia.org/wiki/Wikipedia:Village_pump_%28technical%29#Problems_with_images
- https://en.wikipedia.org/wiki/Wikipedia:Village_pump_%28technical%29#New_vector_image_won.27t_update
- https://en.wikipedia.org/wiki/User_talk:Nowyouseeme#Question about https://en.wikipedia.org/wiki/File:US_Senators_Supporting_SSM.svg
This one has nice testcase:
I can confirm that
https://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/NRHP_Illustrated_Counties.svg/400px-NRHP_Illustrated_Counties.svg.png
sometimes shows the old outdated version, but most of the time shows the updated version (I'm in Europe).
I've went to https://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/NRHP_Illustrated_Counties.svg/400px-NRHP_Illustrated_Counties.svg.png?RandomNumberHere123456789 and then went to https://en.wikipedia.org/wiki/File:NRHP_Illustrated_Counties.svg?action=purge but the problem still persists.
$:andre\> wget -S -U Malyacko --header 'host: upload.wikimedia.org' 'http://upload-lb.eqiad.wikimedia.org/wikipedia/commons/thumb/c/cb/NRHP_Illustrated_Counties.svg/400px-NRHP_Illustrated_Counties.svg.png'
--2013-04-07 01:43:03-- http://upload-lb.eqiad.wikimedia.org/wikipedia/commons/thumb/c/cb/NRHP_Illustrated_Counties.svg/400px-NRHP_Illustrated_Counties.svg.png
Resolving upload-lb.eqiad.wikimedia.org... 208.80.154.235, 2620:0:861:ed1a::b
Connecting to upload-lb.eqiad.wikimedia.org|208.80.154.235|:80... connected.
HTTP request sent, awaiting response...
HTTP/1.1 200 OK X-Object-Meta-Sha1base36: dql1a3r1xtnnop4b5i2xbnbnl2ko53y Content-Disposition: inline;filename*=UTF-8''NRHP_Illustrated_Counties.svg.png Last-Modified: Wed, 03 Apr 2013 06:29:14 GMT Etag: ef9acb99c896a9e9ec19047ee399d96a X-Timestamp: 1364970554.37424 Content-Type: image/png X-Varnish: 2378273142 2051365130, 4237763979 Via: 1.1 varnish, 1.1 varnish Content-Length: 127301 Accept-Ranges: bytes Date: Sat, 06 Apr 2013 23:43:03 GMT Age: 215326 Connection: keep-alive X-Cache: cp1028 hit (536), cp1034 frontend miss (0) Access-Control-Allow-Origin: *
Length: 127301 (124K) [image/png]
Saving to: “400px-NRHP_Illustrated_Counties.svg.png.1”
$:andre\> wget -S -U Malyacko --header 'host: upload.wikimedia.org' 'http://upload-lb.esams.wikimedia.org/wikipedia/commons/thumb/c/cb/NRHP_Illustrated_Counties.svg/400px-NRHP_Illustrated_Counties.svg.png'
--2013-04-07 01:43:18-- http://upload-lb.esams.wikimedia.org/wikipedia/commons/thumb/c/cb/NRHP_Illustrated_Counties.svg/400px-NRHP_Illustrated_Counties.svg.png
Resolving upload-lb.esams.wikimedia.org... 91.198.174.234, 2620:0:862:ed1a::b
Connecting to upload-lb.esams.wikimedia.org|91.198.174.234|:80... connected.
HTTP request sent, awaiting response...
HTTP/1.1 200 OK X-Object-Meta-Sha1base36: dql1a3r1xtnnop4b5i2xbnbnl2ko53y Content-Disposition: inline;filename*=UTF-8''NRHP_Illustrated_Counties.svg.png Last-Modified: Wed, 03 Apr 2013 06:29:14 GMT Etag: ef9acb99c896a9e9ec19047ee399d96a X-Timestamp: 1364970554.37424 Content-Type: image/png X-Varnish: 2377693018 2051365130, 707352624 707109699, 2426462443 2426369331 Via: 1.1 varnish, 1.1 varnish, 1.1 varnish Content-Length: 127301 Accept-Ranges: bytes Date: Sat, 06 Apr 2013 23:43:18 GMT Age: 215340 Connection: keep-alive X-Cache: cp1028 hit (534), cp3006 hit (3), cp3004 frontend hit (1) Access-Control-Allow-Origin: *
Length: 127301 (124K) [image/png]
Saving to: “400px-NRHP_Illustrated_Counties.svg.png.2”
Version: wmf-deployment
Severity: major
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=46931