Warning: mysqli::query(): MySQL server has gone away in /var/lib/mediawiki/includes/libs/rdbms/database/DatabaseMysqli.php on line 46

Warning: mysqli::query(): Error reading result set's header in /var/lib/mediawiki/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
MediaWiki internal error.

Original exception: [d6c04f7485f4329ee0c704b4] /index.php?title=Property:About_organization&limit=500&offset=20&from=&until=&filter= Wikimedia\Rdbms\DBQueryError from line 1496 of /var/lib/mediawiki/includes/libs/rdbms/database/Database.php: A connection error occurred.
Query: SELECT page_id,page_len,page_is_redirect,page_latest,page_content_model,page_namespace,page_title FROM `wik2page` WHERE (page_namespace = '0' AND page_title IN ('366845','691061','248233','674019','308414','079374','656300','715146','836382','176604','621809','421367','947718','936781','383589','361009','815748','429798','936359','049294','919447','071974','347553','870095','611618','148737','879947','692391','910207','622701','501352','147525','888520','282589','508516','235447','250912','339260','917459','317749','732947','823677','266110','167724','363511','701764','499064','081470','822893','621035','524479','989397','615251','126377','620472','158098','103065','876802','186794','748155','610448','978358','276513','949561','693789','925317','053676','925064','045071','661647','887761','928120','257254','782790','649437','003058','966098','397371','585852','187865','040072','299201','975905','230193','287647','575403','357782','536999','149908','856795','660733','286658','041871','476054','522099','309709','841068','935958','912280','814190','220654','004749','354740','911146','604074','340008','265302','765014','417503','976641','754898','147685','254700','827139','858578','493267','178243','369717','930450','001057','741084','141814','318066','736620','691653','156747','223890','996909','603598','775948','655745','468660','329594','957265','048971','434935','194390','766463','568516','479494','377478','431951','571499','831670','649118','684682','158832','541422','578330','840056','000777','829218','568432','352283','794846','970942','083097','000488','704211','317923','510214','625635','247797','024196','493075','911195','403756','114993','285322','060782','281429','119450','367971','398322','583301','881245','933894','307122','990820','099898','279369','635367','330339','389096','854298','806653','811987','373058','632827','240424','764434','271130','189310','964901','237876','894645','196218','724603','271526','909729','250462','876311','440956','923766','263957','376973','687979','502332','985437','004022','843772','815579','247218','089121','236903','837036','704206','563289','646983','956379','368843','781505','087263','776757','009907','947042','447926','964921','721789','712065','188825','871836','394343','121892','946036','245020','724770','961148','545495','394853','256313','427866','197557','964545','379258','549197','439420','070784','279108','049526','862898','461379','437795','019244','470593','062655','451635','257928','607101','957430','633305','552575','299297','917586','788817','600354','618303','972855','601551','958464','440647','543058','754599','459504','673979','953488','807871','925828','358590','065343','007380','837766','300282','478847','586632','428945','513142','387753','530523','798413','663226','970728','101264','605952','821095','616260','067029','503253','796537','066784','999587','056500','329499','915514','445785','749553','930880','632235','849273','603431','786112','953369','681734','268904','027581','995138','367193','972610','341324','517956','619686','975476','174273','256941','736498','315253','251343','830463','937732','950311','554745','980893','936731','317653','173953','192121','991055','324820','396264','615896','551405','296435','173789','133529','809448','180162','392236','522882','173775','727222','476201','624252','843259','431500','022769','317532','305098','646649','402105','559282','952690','576582','329881','316633','817712','888025','557782','205159','178013','917627','382180','255589','384802','416259','540989','227504','521930','107526','973164','993609','890617','860125','985308','791347','235911','271831','312640','314664','245640','521227','721522','228125','179233','357403','614482','412335','159419','956920','896976','635736','750700','538010','461599','715563','046152','102325','224416','670272','238753','822339','552580','043880','199403','527977','206227','846572','471363','793471','189636','599309','647724','361094','678478','497334','877487','281806','184122','146144','291797','691210','853583','118625','369338','144065','505957','473649','595423','556035','832595','470816','278289','880472','135411','527213','237204','606260','398829','912912','914641','066152','730951','800338','078196','782122','384273','788244','441741','393441','212405','114876','206438','166570','248540','451838','315055','659323','367824','453907','200954','256768','918478','536917','911308','914536','685978','290351','336301','607661','776163','577223','658358','628375','935853','223731','735516','296189','318602','201963','644754','498591','410051','534263','618663','353632','689381','387326','698136','777595','239352','761767','962138') )
Function: LinkBatch::doQuery (for SMW\SQLStore\EntityStore\CacheWarmer::fillFromList)
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/Database.php(1693): Wikimedia\Rdbms\Database->query(string, string)
#3 /var/lib/mediawiki/includes/cache/LinkBatch.php(213): Wikimedia\Rdbms\Database->select(string, array, string, string)
#4 /var/lib/mediawiki/includes/cache/LinkBatch.php(141): LinkBatch->doQuery()
#5 /var/lib/mediawiki/includes/cache/LinkBatch.php(130): LinkBatch->executeInto(LinkCache)
#6 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/LinkBatch.php(148): LinkBatch->execute()
#7 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/CacheWarmer.php(127): SMW\MediaWiki\LinkBatch->execute()
#8 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/EntityIdManager.php(889): SMW\SQLStore\EntityStore\CacheWarmer->fillFromList(SMW\Iterators\MappingIterator)
#9 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/EntityLookup.php(402): SMW\SQLStore\EntityStore\EntityIdManager->warmUpCache(SMW\Iterators\MappingIterator)
#10 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/EntityLookup.php(415): SMW\SQLStore\EntityStore\EntityLookup->getPropertySubjects(SMW\DIProperty, NULL, SMW\RequestOptions)
#11 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/SQLStore/SQLStore.php(262): SMW\SQLStore\EntityStore\EntityLookup->getAllPropertySubjects(SMW\DIProperty, SMW\RequestOptions)
#12 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Page/ListBuilder/ValueListBuilder.php(164): SMW\SQLStore\SQLStore->getAllPropertySubjects(SMW\DIProperty, SMW\RequestOptions)
#13 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Page/PropertyPage.php(391): SMW\MediaWiki\Page\ListBuilder\ValueListBuilder->createHtml(SMW\DIProperty, SMW\DIWikiPage, array)
#14 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Page/PropertyPage.php(211): SMW\MediaWiki\Page\PropertyPage->makeValueList()
#15 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Page/Page.php(185): SMW\MediaWiki\Page\PropertyPage->getHtml()
#16 /var/lib/mediawiki/extensions/SemanticMediaWiki/src/MediaWiki/Page/Page.php(101): SMW\MediaWiki\Page\Page->showList()
#17 /var/lib/mediawiki/includes/actions/ViewAction.php(68): SMW\MediaWiki\Page\Page->view()
#18 /var/lib/mediawiki/includes/MediaWiki.php(501): ViewAction->show()
#19 /var/lib/mediawiki/includes/MediaWiki.php(294): MediaWiki->performAction(SMW\MediaWiki\Page\PropertyPage, Title)
#20 /var/lib/mediawiki/includes/MediaWiki.php(860): MediaWiki->performRequest()
#21 /var/lib/mediawiki/includes/MediaWiki.php(517): MediaWiki->main()
#22 /var/lib/mediawiki/index.php(46): MediaWiki->run()
#23 {main}

Exception caught inside exception handler: [d6c04f7485f4329ee0c704b4] /index.php?title=Property:About_organization&limit=500&offset=20&from=&until=&filter= 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}

Warning: Error while sending QUERY packet. PID=2763481 in /var/lib/mediawiki/includes/libs/rdbms/database/DatabaseMysqli.php on line 46