When I visit the login page while not logged in, with verbose logging enabled, I see log events like
Loading CentralAuthUser for user ~2025-* from cache object Loading attached wiki list for global user ~2025-* from DB
That probably shouldn't happen?
I see this both locally and in production.
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| Do not try to load central user when it can't exist | mediawiki/extensions/CentralAuth | master | +9 -0 |
Looks like that's the user name of the temporary account placeholder initialized by PermissionManager for autocreate actions:
#0 /var/www/html/mediawiki/includes/user/UserFactory.php(364): MediaWiki\User\User->setName() #1 /var/www/html/mediawiki/includes/Permissions/PermissionManager.php(460): MediaWiki\User\UserFactory->newTempPlaceholder() #2 /var/www/html/mediawiki/includes/Permissions/PermissionManager.php(291): MediaWiki\Permissions\PermissionManager->getPermissionStatus() #3 /var/www/html/mediawiki/includes/Permissions/UserAuthority.php(380): MediaWiki\Permissions\PermissionManager->userCan() #4 /var/www/html/mediawiki/includes/Permissions/UserAuthority.php(171): MediaWiki\Permissions\UserAuthority->internalCan() #5 /var/www/html/mediawiki/includes/user/User.php(3304): MediaWiki\Permissions\UserAuthority->probablyCan() #6 /var/www/html/mediawiki/includes/Output/OutputPage.php(4233): MediaWiki\User\User->probablyCan() #7 /var/www/html/mediawiki/includes/Output/OutputPage.php(3876): MediaWiki\Output\OutputPage->getJSVars() #8 /var/www/html/mediawiki/includes/Output/OutputPage.php(3898): MediaWiki\Output\OutputPage->getRlClient() #9 /var/www/html/mediawiki/includes/skins/Skin.php(692): MediaWiki\Output\OutputPage->headElement() #10 /var/www/html/mediawiki/includes/Output/OutputPage.php(3286): MediaWiki\Skin\Skin->outputPageFinal() #11 /var/www/html/mediawiki/includes/exception/MWExceptionRenderer.php(197): MediaWiki\Output\OutputPage->output() #12 /var/www/html/mediawiki/includes/exception/MWExceptionRenderer.php(116): MediaWiki\Exception\MWExceptionRenderer::reportHTML() #13 /var/www/html/mediawiki/includes/exception/MWExceptionHandler.php(137): MediaWiki\Exception\MWExceptionRenderer::output() #14 /var/www/html/mediawiki/includes/exception/MWExceptionHandler.php(241): MediaWiki\Exception\MWExceptionHandler::report() #15 /var/www/html/mediawiki/includes/MediaWikiEntryPoint.php(222): MediaWiki\Exception\MWExceptionHandler::handleException() #16 /var/www/html/mediawiki/includes/actions/ActionEntryPoint.php(79): MediaWiki\MediaWikiEntryPoint->handleTopLevelError() #17 /var/www/html/mediawiki/includes/MediaWikiEntryPoint.php(208): MediaWiki\Actions\ActionEntryPoint->handleTopLevelError() #18 /var/www/html/mediawiki/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
It's triggered by edit permission checks from OutputPage.
Probably CA could check for this well-known user name and ignore it.
It's not really a well-known username though, it depends on the temp user naming configuration.
Change #1143130 had a related patch set uploaded (by Gergő Tisza; author: Gergő Tisza):
[mediawiki/extensions/CentralAuth@master] Do not try to load central user for temporary account placeholder
Change #1143130 merged by jenkins-bot:
[mediawiki/extensions/CentralAuth@master] Do not try to load central user when it can't exist