Russ Lavoy wrote:
I have about 6 frontend web servers that host the
mediawiki software, all of which connect to a backend NFS server to share the same image
files (not the software itself, just the images directory). When a user uploads a file
for the first time, it works as expected, but if later they make modifications to the same
image file and re-upload the file, they will randomly get the old or the new version for
about an hour or so then it will be fixed. The end users have tried to purge the image
but that does not work. We have to wait it out.
Mediawiki can send purge notices for the image urls, you should look if
you can configure them to receive and honor them.