https://bugzilla.wikimedia.org/show_bug.cgi?id=24575
Summary: Category and image description pages not purged from
file cache or squid cache on link update
Product: MediaWiki
Version: 1.17-svn
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: Normal
Component: Page editing
AssignedTo: [email protected]
ReportedBy: [email protected]
When someone adds or removes a category from a page, the relevant category page
changes. And when someone adds or removes an image from a page, the relevant
image description page changes, due to the list of file links.
Cache updates for these changes are handled by LinksUpdate::invalidatePages().
However, this function does not update the HTML file cache (i.e.
$wgUseFileCache=true), and it does not purge Squid. Thus, anonymous users see
the old versions of categories and image description pages after an edit is
made.
The fix is made more complicated by the fact that neither of these updates
should be done in the same transaction as the main link update. The link update
transaction locks a lot of rows, and needs to be closed off as soon as
possible.
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