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beta cluster down - Internal error
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Description

The Internal error page is displayed:

Internal error
MediaWiki internal error.

Original exception: [Z8eJd06MHb9KJG4F-qHaNQAAAMI] /w/index.php?centralAuthAutologinTried=1&centralAuthError=Not+centrally+logged+in&returnto=Main+Page&title=Special:UserLogin Error: Class "Html" not found
Backtrace:
from /srv/mediawiki/wmf-config/CommonSettings.php(1821)
#0 /srv/mediawiki/php-master/includes/HookContainer/HookContainer.php(155): {closure}(MediaWiki\Skins\Vector\SkinVector22, string, array)
#1 /srv/mediawiki/php-master/includes/HookContainer/HookRunner.php(3585): MediaWiki\HookContainer\HookContainer->run(string, array)
#2 /srv/mediawiki/php-master/includes/skins/components/SkinComponentFooter.php(38): MediaWiki\HookContainer\HookRunner->onSkinAddFooterLinks(MediaWiki\Skins\Vector\SkinVector22, string, array)
#3 /srv/mediawiki/php-master/includes/skins/components/SkinComponentFooter.php(53): MediaWiki\Skin\SkinComponentFooter->getTemplateDataFooter()
#4 /srv/mediawiki/php-master/includes/skins/Skin.php(214): MediaWiki\Skin\SkinComponentFooter->getTemplateData()
#5 /srv/mediawiki/php-master/includes/skins/SkinTemplate.php(188): Skin->getTemplateData()
#6 /srv/mediawiki/php-master/includes/skins/SkinMustache.php(131): SkinTemplate->getTemplateData()
#7 /srv/mediawiki/php-master/skins/Vector/includes/SkinVector22.php(314): SkinMustache->getTemplateData()
#8 /srv/mediawiki/php-master/includes/skins/SkinMustache.php(93): MediaWiki\Skins\Vector\SkinVector22->getTemplateData()
#9 /srv/mediawiki/php-master/includes/skins/SkinTemplate.php(181): SkinMustache->generateHTML()
#10 /srv/mediawiki/php-master/includes/skins/Skin.php(698): SkinTemplate->outputPage()
#11 /srv/mediawiki/php-master/includes/Output/OutputPage.php(3197): Skin->outputPageFinal(MediaWiki\Output\OutputPage)
#12 /srv/mediawiki/php-master/includes/actions/ActionEntryPoint.php(162): MediaWiki\Output\OutputPage->output(bool)
#13 /srv/mediawiki/php-master/includes/MediaWikiEntryPoint.php(202): MediaWiki\Actions\ActionEntryPoint->execute()
#14 /srv/mediawiki/php-master/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#15 /srv/mediawiki/w/index.php(3): require(string)
#16 {main}

Exception caught inside exception handler: [Z8eJd06MHb9KJG4F-qHaNQAAAMI] /w/index.php?centralAuthAutologinTried=1&centralAuthError=Not+centrally+logged+in&returnto=Main+Page&title=Special:UserLogin Error: Class "Html" not found
Backtrace:
from /srv/mediawiki/wmf-config/CommonSettings.php(1821)
#0 /srv/mediawiki/php-master/includes/HookContainer/HookContainer.php(155): {closure}(MediaWiki\Skins\Vector\SkinVector22, string, array)
#1 /srv/mediawiki/php-master/includes/HookContainer/HookRunner.php(3585): MediaWiki\HookContainer\HookContainer->run(string, array)
#2 /srv/mediawiki/php-master/includes/skins/components/SkinComponentFooter.php(38): MediaWiki\HookContainer\HookRunner->onSkinAddFooterLinks(MediaWiki\Skins\Vector\SkinVector22, string, array)
#3 /srv/mediawiki/php-master/includes/skins/components/SkinComponentFooter.php(53): MediaWiki\Skin\SkinComponentFooter->getTemplateDataFooter()
#4 /srv/mediawiki/php-master/includes/skins/Skin.php(214): MediaWiki\Skin\SkinComponentFooter->getTemplateData()
#5 /srv/mediawiki/php-master/includes/skins/SkinTemplate.php(188): Skin->getTemplateData()
#6 /srv/mediawiki/php-master/includes/skins/SkinMustache.php(131): SkinTemplate->getTemplateData()
#7 /srv/mediawiki/php-master/skins/Vector/includes/SkinVector22.php(314): SkinMustache->getTemplateData()
#8 /srv/mediawiki/php-master/includes/skins/SkinMustache.php(93): MediaWiki\Skins\Vector\SkinVector22->getTemplateData()
#9 /srv/mediawiki/php-master/includes/skins/SkinTemplate.php(181): SkinMustache->generateHTML()
#10 /srv/mediawiki/php-master/includes/skins/Skin.php(698): SkinTemplate->outputPage()
#11 /srv/mediawiki/php-master/includes/Output/OutputPage.php(3197): Skin->outputPageFinal(MediaWiki\Output\OutputPage)
#12 /srv/mediawiki/php-master/includes/exception/MWExceptionRenderer.php(189): MediaWiki\Output\OutputPage->output()
#13 /srv/mediawiki/php-master/includes/exception/MWExceptionRenderer.php(110): MWExceptionRenderer::reportHTML(Error)
#14 /srv/mediawiki/php-master/includes/exception/MWExceptionHandler.php(134): MWExceptionRenderer::output(Error, int)
#15 /srv/mediawiki/php-master/includes/exception/MWExceptionHandler.php(238): MWExceptionHandler::report(Error)
#16 /srv/mediawiki/php-master/includes/MediaWikiEntryPoint.php(222): MWExceptionHandler::handleException(Error, string)
#17 /srv/mediawiki/php-master/includes/actions/ActionEntryPoint.php(81): MediaWiki\MediaWikiEntryPoint->handleTopLevelError(Error)
#18 /srv/mediawiki/php-master/includes/MediaWikiEntryPoint.php(208): MediaWiki\Actions\ActionEntryPoint->handleTopLevelError(Error)
#19 /srv/mediawiki/php-master/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#20 /srv/mediawiki/w/index.php(3): require(string)
#21 {main}

The second error would be the same for any page:

Exception caught inside exception handler: [Z8eJd06MHb9KJG4F-qHaNQAAAMI] /w/index.php?centralAuthAutologinTried=1&centralAuthError=Not+centrally+logged+in&returnto=Main+Page&title=Special:UserLogin Error: Class "Html" not found

Event Timeline

Daimona subscribed.

I wonder if this is related to T166010.

Most likely. I made a patch for the other task before finding this one, let me update it now.

Change #1124548 had a related patch set uploaded (by Daimona Eaytoy; author: Daimona Eaytoy):

[operations/mediawiki-config@master] Use namespaced Title and Html classes

https://gerrit.wikimedia.org/r/1124548

The issue has been temporarily "fixed" by reverting the offending core patch. I've scheduled the proper fix for tomorrow 2025-03-05 14:00 UTC, assuming it needs to go through the normal backport/config process.

Change #1124548 merged by jenkins-bot:

[operations/mediawiki-config@master] Use namespaced Title and Html classes

https://gerrit.wikimedia.org/r/1124548

Mentioned in SAL (#wikimedia-operations) [2025-03-05T14:09:14Z] <dreamyjazz@deploy2002> Started scap sync-world: Backport for [[gerrit:1124480|Set Flow to read-only on remaining phase 2a wikis (T378834)]], [[gerrit:1124500|Remove unused config parameters from ReadingLists extension.]], [[gerrit:1124548|Use namespaced Title and Html classes (T166010 T387938)]], [[gerrit:1124549|officewiki: Disable the event-organizer user group (T387943)]], [[gerrit:1124768|Temporarily unset tempora

Mentioned in SAL (#wikimedia-operations) [2025-03-05T14:12:12Z] <dreamyjazz@deploy2002> daimona, zoe, dreamyjazz, dbrant: Backport for [[gerrit:1124480|Set Flow to read-only on remaining phase 2a wikis (T378834)]], [[gerrit:1124500|Remove unused config parameters from ReadingLists extension.]], [[gerrit:1124548|Use namespaced Title and Html classes (T166010 T387938)]], [[gerrit:1124549|officewiki: Disable the event-organizer user group (T387943)]], [[gerrit:1124768|Temporarily unse

Mentioned in SAL (#wikimedia-operations) [2025-03-05T14:23:41Z] <dreamyjazz@deploy2002> Finished scap sync-world: Backport for [[gerrit:1124480|Set Flow to read-only on remaining phase 2a wikis (T378834)]], [[gerrit:1124500|Remove unused config parameters from ReadingLists extension.]], [[gerrit:1124548|Use namespaced Title and Html classes (T166010 T387938)]], [[gerrit:1124549|officewiki: Disable the event-organizer user group (T387943)]], [[gerrit:1124768|Temporarily unset tempor