Warning: Error while sending QUERY packet. PID=2763786 in /var/lib/mediawiki/includes/libs/rdbms/database/DatabaseMysqli.php on line 46

Warning: Error while sending QUERY packet. PID=2763786 in /var/lib/mediawiki/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
MediaWiki internal error.

Original exception: [7c0f99a3831cc386beaa33e9] /index.php?title=019691&oldid=29103&mobileaction=toggle_view_mobile Wikimedia\Rdbms\DBQueryError from line 1496 of /var/lib/mediawiki/includes/libs/rdbms/database/Database.php: A connection error occurred.
Query: SELECT p.smw_title AS prop, o_id AS id0, o0.smw_title AS v0, o0.smw_namespace AS v1, o0.smw_iw AS v2, o0.smw_sortkey AS v3, o0.smw_subobject AS v4, o0.smw_sort AS v5 FROM `wik2smw_di_wikipage` INNER JOIN `wik2smw_object_ids` AS p ON p_id=p.smw_id INNER JOIN `wik2smw_object_ids` AS o0 ON o_id=o0.smw_id WHERE (s_id='22') AND (p.smw_iw!=':smw') AND (p.smw_iw!=':smw-delete')
Function: SMW\SQLStore\EntityStore\SemanticDataLookup::fetchSemanticDataFromTable
Error: 2006 MySQL server has gone away (localhost)

Backtrace:
#0 /var/lib/mediawiki/includes/libs/rdbms/database/Database.php(1466): Wikimedia\Rdbms\Database->makeQueryException(string, integer, string, string)
#1 /var/lib/mediawiki/includes/libs/rdbms/database/Database.php(1226): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#2 /var/lib/mediawiki/includes/libs/rdbms/database/DBConnRef.php(49): Wikimedia\Rdbms\Database->query(string, string, boolean)
#3 /var/lib/mediawiki/includes/libs/rdbms/database/DBConnRef.php(238): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#4 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Connection/Database.php(366): Wikimedia\Rdbms\DBConnRef->query(string, string, boolean)
#5 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/SemanticDataLookup.php(525): SMW\MediaWiki\Connection\Database->query(string, string)
#6 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/SemanticDataLookup.php(387): SMW\SQLStore\EntityStore\SemanticDataLookup->fetchFromTable(SMW\MediaWiki\Connection\Query, SMW\SQLStore\PropertyTableDefinition, boolean, SMW\RequestOptions)
#7 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/CachingSemanticDataLookup.php(310): SMW\SQLStore\EntityStore\SemanticDataLookup->fetchSemanticDataFromTable(integer, SMW\DIWikiPage, SMW\SQLStore\PropertyTableDefinition)
#8 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/CachingSemanticDataLookup.php(279): SMW\SQLStore\EntityStore\CachingSemanticDataLookup->fetchFromCache(integer, SMW\DIWikiPage, SMW\SQLStore\PropertyTableDefinition)
#9 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/EntityLookup.php(296): SMW\SQLStore\EntityStore\CachingSemanticDataLookup->getSemanticData(integer, SMW\DIWikiPage, SMW\SQLStore\PropertyTableDefinition, NULL)
#10 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/SQLStore.php(220): SMW\SQLStore\EntityStore\EntityLookup->getPropertyValues(SMW\DIWikiPage, SMW\DIProperty, NULL)
#11 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/Property/SpecificationLookup.php(116): SMW\SQLStore\SQLStore->getPropertyValues(SMW\DIWikiPage, SMW\DIProperty)
#12 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/Schema/SchemaFinder.php(68): SMW\Property\SpecificationLookup->getSpecification(SMW\DIProperty, SMW\DIProperty)
#13 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/DataModel/SequenceMap.php(41): SMW\Schema\SchemaFinder->newSchemaList(SMW\DIProperty, SMW\DIProperty)
#14 /var/lib/mediawiki/extensions/SemanticMediaWiki/includes/SemanticData.php(473): SMW\DataModel\SequenceMap::canMap(SMW\DIProperty)
#15 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/ProcessingErrorMsgHandler.php(233): SMW\SemanticData->addPropertyObjectValue(SMW\DIProperty, SMW\DIWikiPage)
#16 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/ProcessingErrorMsgHandler.php(220): SMW\ProcessingErrorMsgHandler->publishError(SMW\DataModel\ContainerSemanticData, SMW\DIProperty, string, string)
#17 /var/lib/mediawiki/extensions/SemanticMediaWiki/includes/SemanticData.php(558): SMW\ProcessingErrorMsgHandler->newErrorContainerFromDataValue(SMWNumberValue)
#18 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/ParserData.php(391): SMW\SemanticData->addDataValue(SMWNumberValue)
#19 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/Parser/InTextAnnotationParser.php(424): SMW\ParserData->addDataValue(SMWNumberValue)
#20 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/Parser/InTextAnnotationParser.php(391): SMW\Parser\InTextAnnotationParser->addPropertyValue(SMW\DIWikiPage, array, string, boolean)
#21 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/Parser/InTextAnnotationParser.php(355): SMW\Parser\InTextAnnotationParser->process(array)
#22 [internal function]: SMW\Parser\InTextAnnotationParser->preprocess(array)
#23 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/Parser/InTextAnnotationParser.php(183): preg_replace_callback(string, string, string)
#24 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/InternalParseBeforeLinks.php(134): SMW\Parser\InTextAnnotationParser->parse(string)
#25 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/InternalParseBeforeLinks.php(65): SMW\MediaWiki\Hooks\InternalParseBeforeLinks->performUpdate(string)
#26 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Hooks.php(556): SMW\MediaWiki\Hooks\InternalParseBeforeLinks->process(string)
#27 /var/lib/mediawiki/includes/Hooks.php(174): SMW\MediaWiki\Hooks->onInternalParseBeforeLinks(Parser, string, StripState)
#28 /var/lib/mediawiki/includes/Hooks.php(202): Hooks::callHook(string, array, array, NULL)
#29 /var/lib/mediawiki/includes/parser/Parser.php(1362): Hooks::run(string, array)
#30 /var/lib/mediawiki/includes/parser/Parser.php(476): Parser->internalParse(string)
#31 /var/lib/mediawiki/includes/content/WikitextContent.php(341): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#32 /var/lib/mediawiki/includes/content/AbstractContent.php(517): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#33 /var/lib/mediawiki/includes/Revision/RenderedRevision.php(242): AbstractContent->getParserOutput(Title, integer, ParserOptions, boolean)
#34 /var/lib/mediawiki/includes/Revision/RenderedRevision.php(211): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached(WikitextContent, boolean)
#35 /var/lib/mediawiki/includes/Revision/RevisionRenderer.php(175): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string)
#36 /var/lib/mediawiki/includes/Revision/RevisionRenderer.php(128): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, array)
#37 [internal function]: MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#38 /var/lib/mediawiki/includes/Revision/RenderedRevision.php(175): call_user_func(Closure, MediaWiki\Revision\RenderedRevision, array)
#39 /var/lib/mediawiki/includes/poolcounter/PoolWorkArticleView.php(194): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#40 /var/lib/mediawiki/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#41 /var/lib/mediawiki/includes/page/Article.php(774): PoolCounterWork->execute()
#42 /var/lib/mediawiki/includes/actions/ViewAction.php(68): Article->view()
#43 /var/lib/mediawiki/includes/MediaWiki.php(501): ViewAction->show()
#44 /var/lib/mediawiki/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#45 /var/lib/mediawiki/includes/MediaWiki.php(860): MediaWiki->performRequest()
#46 /var/lib/mediawiki/includes/MediaWiki.php(517): MediaWiki->main()
#47 /var/lib/mediawiki/index.php(46): MediaWiki->run()
#48 {main}

Exception caught inside exception handler: [7c0f99a3831cc386beaa33e9] /index.php?title=019691&oldid=29103&mobileaction=toggle_view_mobile Wikimedia\Rdbms\DBConnectionError from line 1195 of /var/lib/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php: Cannot access the database: Unknown error (localhost)
Backtrace:
#0 /var/lib/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(769): Wikimedia\Rdbms\LoadBalancer->reportConnectionError()
#1 /var/lib/mediawiki/includes/GlobalFunctions.php(2694): Wikimedia\Rdbms\LoadBalancer->getConnection(integer, array, boolean)
#2 /var/lib/mediawiki/includes/cache/localisation/LCStoreDB.php(54): wfGetDB(integer)
#3 /var/lib/mediawiki/includes/cache/localisation/LocalisationCache.php(391): LCStoreDB->get(string, string)
#4 /var/lib/mediawiki/includes/cache/localisation/LocalisationCache.php(294): LocalisationCache->loadSubitem(string, string, string)
#5 /var/lib/mediawiki/languages/Language.php(2643): LocalisationCache->getSubitem(string, string, string)
#6 /var/lib/mediawiki/includes/cache/MessageCache.php(970): Language->getMessage(string)
#7 /var/lib/mediawiki/includes/cache/MessageCache.php(928): MessageCache->getMessageForLang(Language, string, boolean, array)
#8 /var/lib/mediawiki/includes/cache/MessageCache.php(870): MessageCache->getMessageFromFallbackChain(Language, string, boolean)
#9 /var/lib/mediawiki/includes/Message.php(1299): MessageCache->get(string, boolean, Language)
#10 /var/lib/mediawiki/includes/Message.php(851): Message->fetchMessage()
#11 /var/lib/mediawiki/includes/Message.php(943): Message->toString(string)
#12 /var/lib/mediawiki/includes/exception/MWExceptionRenderer.php(132): Message->text()
#13 /var/lib/mediawiki/includes/exception/MWExceptionRenderer.php(53): MWExceptionRenderer::reportHTML(Wikimedia\Rdbms\DBQueryError)
#14 /var/lib/mediawiki/includes/exception/MWExceptionHandler.php(98): MWExceptionRenderer::output(Wikimedia\Rdbms\DBQueryError, integer)
#15 /var/lib/mediawiki/includes/exception/MWExceptionHandler.php(172): MWExceptionHandler::report(Wikimedia\Rdbms\DBQueryError)
#16 /var/lib/mediawiki/includes/MediaWiki.php(544): MWExceptionHandler::handleException(Wikimedia\Rdbms\DBQueryError)
#17 /var/lib/mediawiki/index.php(46): MediaWiki->run()
#18 {main}