In September 2014, I described an intermittent recurrent problem
associated with the InstantCommons images.
I hadn't seen the problem seen since April or May of 2015.
It is now back -- after I upgraded to MediaWiki 1.26.2.
Unlike in the past, it hasn't resolved with a server re-boot.
I did have record traffic earlier in the week... but the problem
--like in the past-- doesn't seem to be traffic related.
I cannot find a relation to memory. I'm not running out of memory.
The underlying LAMP (Debian Linux Apache MySQL PHP) stack hasn't changed.
Product Versions
Operating System: Debian (stable)
MediaWiki 1.26.2 (f465524)
PHP 5.6.13-0+deb8u1 (apache2handler)
MySQL 5.5.44-0+deb8u1
The details of what is installed is here:
http://librepathology.org/wiki/index.php/Special:Version
I do have git installed -- and am using it to upgrade.
Like in the past-- the image that is local to the site, i.e.
non-InstantCommons,
(
http://librepathology.org/wiki/index.php/File:Atypical_ductal_hyperplasia_-_very_high_mag.jpg
)
is still there-- and displays properly. At the same time, all the
images from the InstantCommons are gone.
A list of previous posts I did can be found here:
https://lists.wikimedia.org/pipermail/mediawiki-l/2014-September/043340.html
https://lists.wikimedia.org/pipermail/mediawiki-l/2014-September/043345.html
https://lists.wikimedia.org/pipermail/mediawiki-l/2014-September/043348.html
https://lists.wikimedia.org/pipermail/mediawiki-l/2014-September/043349.html
Help on this would be much appreciated...
I have a testing site (pathologyprotocols.org) that is running the
exact same set-up (behind a login).
It is also failing suddenly in the same way; the InstantCommons images
are gone.
I wonder whether...
- It is the InstantCommons server
- There is "talk" between the InstantCommons server and a MediaWiki
install (with the InstantCommons activated).
I know this as images that are removed from the InstantCommons...
are then removed on then
MediaWiki install with InstantCommons activated.
I think the communication is governed by 'descriptionCacheExpiry'
and 'apiThumbCacheExpiry'
https://www.mediawiki.org/wiki/Manual:$wgUseInstantCommons
? I wonder whether setting those to infinity would solve anything.
- I suspect the thumb cache is purged... and then there is a bug
preventing the image from being
confirmed as being the same as on the InstantCommons... or there a
processing bottle neck as the thumbnails have to be re-created.
Thanks in Advance,
Michael
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