Deprecated: $wgMWOAuthSharedUserIDs=false is deprecated, set $wgMWOAuthSharedUserIDs=true, $wgMWOAuthSharedUserSource='local' instead [Called from MediaWiki\HookContainer\HookContainer::run in /var/www/html/w/includes/HookContainer/HookContainer.php at line 135] in /var/www/html/w/includes/Debug/MWDebug.php on line 372
MediaWiki internal error.

Original exception: [dd89ef861e42e57e347511ab] /wiki/Huiling_Wu Wikimedia\Rdbms\DBQueryDisconnectedError: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading or after adding a new extension?

Please see https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Upgrading and https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:How_to_debug for more information.

A connection error occurred during a query.
Query: SELECT ss_total_edits,ss_good_articles,ss_total_pages,ss_users,ss_active_users,ss_images FROM `site_stats`
Function: MediaWiki\SiteStats\SiteStats::doLoadFromDB
Error: 2006 MySQL server has gone away

Backtrace:
from /var/www/html/w/includes/libs/Rdbms/Database/Database.php(1225)
#0 /var/www/html/w/includes/libs/Rdbms/Database/Database.php(1211): Wikimedia\Rdbms\Database->getQueryException(string, int, string, string)
#1 /var/www/html/w/includes/libs/Rdbms/Database/Database.php(1185): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, int, string, string)
#2 /var/www/html/w/includes/libs/Rdbms/Database/Database.php(642): Wikimedia\Rdbms\Database->reportQueryError(string, int, string, string, bool)
#3 /var/www/html/w/includes/libs/Rdbms/Database/Database.php(1365): Wikimedia\Rdbms\Database->query(Wikimedia\Rdbms\Query, string)
#4 /var/www/html/w/includes/libs/Rdbms/Database/DBConnRef.php(129): Wikimedia\Rdbms\Database->select(array, array, array, string, array, array)
#5 /var/www/html/w/includes/libs/Rdbms/Database/DBConnRef.php(386): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#6 /var/www/html/w/includes/libs/Rdbms/QueryBuilder/SelectQueryBuilder.php(761): Wikimedia\Rdbms\DBConnRef->select(array, array, array, string, array, array)
#7 /var/www/html/w/includes/SiteStats/SiteStats.php(232): Wikimedia\Rdbms\SelectQueryBuilder->fetchResultSet()
#8 /var/www/html/w/includes/SiteStats/SiteStats.php(48): MediaWiki\SiteStats\SiteStats::doLoadFromDB(Wikimedia\Rdbms\DBConnRef)
#9 /var/www/html/w/includes/SiteStats/SiteStats.php(35): MediaWiki\SiteStats\SiteStats::loadAndLazyInit()
#10 /var/www/html/w/includes/SiteStats/SiteStats.php(98): MediaWiki\SiteStats\SiteStats::load()
#11 /var/www/html/w/extensions/Scribunto/includes/Engines/LuaCommon/SiteLibrary.php(108): MediaWiki\SiteStats\SiteStats::pages()
#12 /var/www/html/w/extensions/Scribunto/includes/Engines/LuaCommon/LuaEngine.php(545): MediaWiki\Extension\Scribunto\Engines\LuaCommon\SiteLibrary->register()
#13 /var/www/html/w/extensions/Scribunto/includes/Engines/LuaCommon/LuaEngine.php(178): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaEngine->instantiatePHPLibrary(string, bool)
#14 /var/www/html/w/extensions/Scribunto/includes/Engines/LuaStandalone/LuaStandaloneEngine.php(20): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaEngine->load()
#15 /var/www/html/w/extensions/Scribunto/includes/Engines/LuaCommon/LuaEngine.php(251): MediaWiki\Extension\Scribunto\Engines\LuaStandalone\LuaStandaloneEngine->load()
#16 /var/www/html/w/extensions/Scribunto/includes/Engines/LuaCommon/LuaModule.php(44): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaEngine->getInterpreter()
#17 /var/www/html/w/extensions/Scribunto/includes/Engines/LuaCommon/LuaModule.php(61): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaModule->getInitChunk()
#18 /var/www/html/w/extensions/Scribunto/includes/Hooks.php(175): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaModule->invoke(string, MediaWiki\Parser\PPTemplateFrame_Hash)
#19 /var/www/html/w/includes/Parser/Parser.php(3417): MediaWiki\Extension\Scribunto\Hooks->invokeHook(MediaWiki\Parser\Parser, MediaWiki\Parser\PPTemplateFrame_Hash, array)
#20 /var/www/html/w/includes/Parser/Parser.php(3072): MediaWiki\Parser\Parser->callParserFunction(MediaWiki\Parser\PPTemplateFrame_Hash, string, array, bool)
#21 /var/www/html/w/includes/Parser/PPFrame_Hash.php(266): MediaWiki\Parser\Parser->braceSubstitution(array, MediaWiki\Parser\PPTemplateFrame_Hash)
#22 /var/www/html/w/includes/Parser/PPTemplateFrame_Hash.php(86): MediaWiki\Parser\PPFrame_Hash->expand(MediaWiki\Parser\PPNode_Hash_Tree, int)
#23 /var/www/html/w/includes/Parser/Parser.php(3270): MediaWiki\Parser\PPTemplateFrame_Hash->cachedExpand(string, MediaWiki\Parser\PPNode_Hash_Tree)
#24 /var/www/html/w/includes/Parser/PPFrame_Hash.php(266): MediaWiki\Parser\Parser->braceSubstitution(array, MediaWiki\Parser\PPFrame_Hash)
#25 /var/www/html/w/includes/Parser/Parser.php(2895): MediaWiki\Parser\PPFrame_Hash->expand(MediaWiki\Parser\PPNode_Hash_Tree, int)
#26 /var/www/html/w/includes/Parser/Parser.php(1537): MediaWiki\Parser\Parser->replaceVariables(string)
#27 /var/www/html/w/includes/Parser/Parser.php(624): MediaWiki\Parser\Parser->internalParse(string)
#28 /var/www/html/w/includes/Content/WikitextContentHandler.php(375): MediaWiki\Parser\Parser->parse(string, MediaWiki\Title\Title, MediaWiki\Parser\ParserOptions, bool, bool, int)
#29 /var/www/html/w/includes/Content/ContentHandler.php(1574): MediaWiki\Content\WikitextContentHandler->fillParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Content\Renderer\ContentParseParams, MediaWiki\Parser\ParserOutput)
#30 /var/www/html/w/includes/Content/Renderer/ContentRenderer.php(67): MediaWiki\Content\ContentHandler->getParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Content\Renderer\ContentParseParams)
#31 /var/www/html/w/includes/Revision/RenderedRevision.php(246): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput(MediaWiki\Content\WikitextContent, MediaWiki\Page\PageIdentityValue, MediaWiki\Revision\RevisionStoreRecord, MediaWiki\Parser\ParserOptions, array)
#32 /var/www/html/w/includes/Revision/RenderedRevision.php(219): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached(MediaWiki\Content\WikitextContent, array)
#33 /var/www/html/w/includes/Revision/RevisionRenderer.php(225): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string, array)
#34 /var/www/html/w/includes/Revision/RevisionRenderer.php(158): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, MediaWiki\Parser\ParserOptions, array)
#35 /var/www/html/w/includes/Revision/RenderedRevision.php(182): MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#36 /var/www/html/w/includes/Page/ParserOutputAccess.php(590): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#37 /var/www/html/w/includes/Page/ParserOutputAccess.php(681): MediaWiki\Page\ParserOutputAccess->renderRevision(MediaWiki\Page\WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, array)
#38 /var/www/html/w/includes/PoolCounter/PoolCounterWorkViaCallback.php(68): MediaWiki\Page\ParserOutputAccess->MediaWiki\Page\{closure}()
#39 /var/www/html/w/includes/PoolCounter/PoolCounterWork.php(159): MediaWiki\PoolCounter\PoolCounterWorkViaCallback->doWork()
#40 /var/www/html/w/includes/Page/ParserOutputAccess.php(495): MediaWiki\PoolCounter\PoolCounterWork->execute()
#41 /var/www/html/w/includes/Page/Article.php(864): MediaWiki\Page\ParserOutputAccess->getParserOutput(MediaWiki\Page\WikiPage, MediaWiki\Parser\ParserOptions, MediaWiki\Revision\RevisionStoreRecord, array)
#42 /var/www/html/w/includes/Page/Article.php(535): MediaWiki\Page\Article->generateContentOutput(MediaWiki\User\User, MediaWiki\Parser\ParserOptions, int, MediaWiki\Output\OutputPage, array)
#43 /var/www/html/w/includes/Actions/ViewAction.php(71): MediaWiki\Page\Article->view()
#44 /var/www/html/w/includes/Actions/ActionEntryPoint.php(739): MediaWiki\Actions\ViewAction->show()
#45 /var/www/html/w/includes/Actions/ActionEntryPoint.php(510): MediaWiki\Actions\ActionEntryPoint->performAction(MediaWiki\Page\Article, MediaWiki\Title\Title)
#46 /var/www/html/w/includes/Actions/ActionEntryPoint.php(144): MediaWiki\Actions\ActionEntryPoint->performRequest()
#47 /var/www/html/w/includes/MediaWikiEntryPoint.php(181): MediaWiki\Actions\ActionEntryPoint->execute()
#48 /var/www/html/w/index.php(44): MediaWiki\MediaWikiEntryPoint->run()
#49 {main}

Exception caught inside exception handler: [dd89ef861e42e57e347511ab] /wiki/Huiling_Wu Wikimedia\Rdbms\DBConnectionError: Cannot access the database: Connection refused (mysql.svc:3306)
Backtrace:
from /var/www/html/w/includes/libs/Rdbms/LoadBalancer/LoadBalancer.php(1125)
#0 /var/www/html/w/includes/libs/Rdbms/LoadBalancer/LoadBalancer.php(823): Wikimedia\Rdbms\LoadBalancer->reportConnectionError()
#1 /var/www/html/w/includes/libs/Rdbms/LoadBalancer/LoadBalancer.php(789): Wikimedia\Rdbms\LoadBalancer->getServerConnection(int, string, int)
#2 /var/www/html/w/includes/libs/Rdbms/Database/DBConnRef.php(109): Wikimedia\Rdbms\LoadBalancer->getConnectionInternal(int, array, string, int)
#3 /var/www/html/w/includes/libs/Rdbms/Database/DBConnRef.php(127): Wikimedia\Rdbms\DBConnRef->ensureConnection()
#4 /var/www/html/w/includes/libs/Rdbms/Database/DBConnRef.php(386): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#5 /var/www/html/w/includes/libs/Rdbms/QueryBuilder/SelectQueryBuilder.php(761): Wikimedia\Rdbms\DBConnRef->select(array, array, array, string, array, array)
#6 /var/www/html/w/includes/Page/PageProps.php(103): Wikimedia\Rdbms\SelectQueryBuilder->fetchResultSet()
#7 /var/www/html/w/extensions/DisplayTitle/includes/DisplayTitleService.php(204): MediaWiki\Page\PageProps->getProperties(MediaWiki\Title\Title, array)
#8 /var/www/html/w/extensions/DisplayTitle/includes/DisplayTitleService.php(239): MediaWiki\Extension\DisplayTitle\DisplayTitleService->getDisplayTitle(MediaWiki\Title\Title, null)
#9 /var/www/html/w/extensions/DisplayTitle/includes/DisplayTitleHooks.php(169): MediaWiki\Extension\DisplayTitle\DisplayTitleService->setSubtitle(MediaWiki\Output\OutputPage)
#10 /var/www/html/w/includes/HookContainer/HookContainer.php(134): MediaWiki\Extension\DisplayTitle\DisplayTitleHooks->onBeforePageDisplay(MediaWiki\Output\OutputPage, Skins\Chameleon\Chameleon)
#11 /var/www/html/w/includes/HookContainer/HookRunner.php(1022): MediaWiki\HookContainer\HookContainer->run(string, array, array)
#12 /var/www/html/w/includes/Output/OutputPage.php(3300): MediaWiki\HookContainer\HookRunner->onBeforePageDisplay(MediaWiki\Output\OutputPage, Skins\Chameleon\Chameleon)
#13 /var/www/html/w/includes/Exception/MWExceptionRenderer.php(185): MediaWiki\Output\OutputPage->output()
#14 /var/www/html/w/includes/Exception/MWExceptionRenderer.php(103): MediaWiki\Exception\MWExceptionRenderer::reportHTML(Wikimedia\Rdbms\DBQueryDisconnectedError)
#15 /var/www/html/w/includes/Exception/MWExceptionHandler.php(123): MediaWiki\Exception\MWExceptionRenderer::output(Wikimedia\Rdbms\DBQueryDisconnectedError, int)
#16 /var/www/html/w/includes/Exception/MWExceptionHandler.php(224): MediaWiki\Exception\MWExceptionHandler::report(Wikimedia\Rdbms\DBQueryDisconnectedError)
#17 /var/www/html/w/includes/MediaWikiEntryPoint.php(201): MediaWiki\Exception\MWExceptionHandler::handleException(Wikimedia\Rdbms\DBQueryDisconnectedError, string)
#18 /var/www/html/w/includes/Actions/ActionEntryPoint.php(80): MediaWiki\MediaWikiEntryPoint->handleTopLevelError(Wikimedia\Rdbms\DBQueryDisconnectedError)
#19 /var/www/html/w/includes/MediaWikiEntryPoint.php(187): MediaWiki\Actions\ActionEntryPoint->handleTopLevelError(Wikimedia\Rdbms\DBQueryDisconnectedError)
#20 /var/www/html/w/index.php(44): MediaWiki\MediaWikiEntryPoint->run()
#21 {main}