https://bugzilla.wikimedia.org/show_bug.cgi?id=65683

--- Comment #7 from Bawolff (Brian Wolff) <[email protected]> ---

> On varnish side:
> 
> deployment-cache-upload02.eqiad.wmflabs 25 2014-05-23T17:56:19 0.000068188
> 127.0.0.1 -/204 0 PURGE
> http://upload.beta.wmflabs.org/wikipedia/commons/thumb/c/ca/
> Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg/800px-
> Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg - - - - vhtcpd
> $
> 

bawolff@Bawolff-L:~$ wget -S
'http://upload.beta.wmflabs.org/wikipedia/commons/thumb/c/ca/Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg/800px-Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg'
--2014-05-23 15:12:42-- 
http://upload.beta.wmflabs.org/wikipedia/commons/thumb/c/ca/Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg/800px-Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg
Resolving upload.beta.wmflabs.org (upload.beta.wmflabs.org)... 208.80.155.136
Connecting to upload.beta.wmflabs.org
(upload.beta.wmflabs.org)|208.80.155.136|:80... connected.
HTTP request sent, awaiting response... 
  HTTP/1.1 200 OK
  Server: nginx/1.1.19
  Content-Type: image/jpeg
  X-Powered-By: PHP/5.3.10-1ubuntu3.10+wmf1
  X-Wikimedia-Thumb:
http://10.68.16.16/w/thumb.php?f=Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg&width=800
  X-Varnish: 435262255 435256949, 1820643391 1820643388
  Via: 1.1 varnish, 1.1 varnish
  Content-Length: 114849
  Accept-Ranges: bytes
  Date: Fri, 23 May 2014 18:12:06 GMT
  Age: 5016
  Connection: keep-alive
  X-Cache: deployment-cache-upload02 hit (12), deployment-cache-upload02
frontend hit (1)
  Access-Control-Allow-Origin: *
  Access-Control-Expose-Headers: Age, Content-Length, Date, X-Cache, X-Varnish
Length: 114849 (112K) [image/jpeg]
Saving to: `800px-Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg'

100%[======================================>] 114,849      541K/s   in 0.2s    

2014-05-23 15:12:42 (541 KB/s) -
`800px-Imaginative_depiction_of_the_completed_Forth_Rail_Bridge.jpg' saved
[114849/114849]



In particular note the Age header (  Age: 5016 ). Unless you did that purge 83
minutes ago, it didn't work. I suspect there's some acl in the varnish config
discarding the purge (That's a total guess)

> 
> Maybe gwtoolset hit some code which ends up not sending purge request?  We
> might be able to find out the debug log if purge requests are logged there.

Not just gwtoolset. Normal mediawiki purging wasn't working either.

Purge requests are sent to the debug log via wfDebugLog with the 'squid' log
name.

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