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

Warning: Error while sending QUERY packet. PID=2691062 in /var/lib/mediawiki/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
MediaWiki internal error.

Original exception: [5392bdbd55979fde16fd4ee6] /index.php?title=Konstant%C4%ABns_Luben%C4%8Denko&action=edit Wikimedia\Rdbms\DBQueryError from line 1496 of /var/lib/mediawiki/includes/libs/rdbms/database/Database.php: A connection error occurred.
Query: SELECT page_title,page_latest FROM `wik2page` WHERE page_is_redirect = '0' AND page_namespace = '8' AND (page_title NOT LIKE '%/%' ESCAPE '`' ) AND (page_len > 10000)
Function: MessageCache::loadFromDB(lv)-big
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/MessageCache.php(511): Wikimedia\Rdbms\Database->select(string, array, array, string)
#4 /var/lib/mediawiki/includes/cache/MessageCache.php(427): MessageCache->loadFromDB(string, NULL)
#5 /var/lib/mediawiki/includes/cache/MessageCache.php(350): MessageCache->loadFromDBWithLock(string, array, NULL)
#6 /var/lib/mediawiki/includes/cache/MessageCache.php(1031): MessageCache->load(string)
#7 /var/lib/mediawiki/includes/cache/MessageCache.php(958): MessageCache->getMsgFromNamespace(string, string)
#8 /var/lib/mediawiki/includes/cache/MessageCache.php(928): MessageCache->getMessageForLang(Language, string, boolean, array)
#9 /var/lib/mediawiki/includes/cache/MessageCache.php(870): MessageCache->getMessageFromFallbackChain(Language, string, boolean)
#10 /var/lib/mediawiki/includes/Message.php(1299): MessageCache->get(string, boolean, Language)
#11 /var/lib/mediawiki/includes/Message.php(1003): Message->fetchMessage()
#12 /var/lib/mediawiki/includes/user/UserGroupMembership.php(433): Message->isBlank()
#13 /var/lib/mediawiki/includes/user/UserGroupMembership.php(392): UserGroupMembership::getGroupName(string)
#14 /var/lib/mediawiki/includes/user/User.php(5702): UserGroupMembership::getLink(string, RequestContext, string)
#15 /var/lib/mediawiki/includes/Title.php(2798): User::newFatalPermissionDeniedStatus(string)
#16 /var/lib/mediawiki/includes/Title.php(2289): Title->missingPermissionError(string, boolean)
#17 /var/lib/mediawiki/includes/Title.php(2864): Title->checkQuickPermissions(string, User, array, string, boolean)
#18 /var/lib/mediawiki/includes/Title.php(2205): Title->getUserPermissionsErrorsInternal(string, User, string)
#19 /var/lib/mediawiki/includes/EditPage.php(711): Title->getUserPermissionsErrors(string, User, string)
#20 /var/lib/mediawiki/includes/EditPage.php(618): EditPage->getEditPermissionErrors(string)
#21 /var/lib/mediawiki/includes/actions/EditAction.php(60): EditPage->edit()
#22 /var/lib/mediawiki/includes/MediaWiki.php(501): EditAction->show()
#23 /var/lib/mediawiki/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#24 /var/lib/mediawiki/includes/MediaWiki.php(860): MediaWiki->performRequest()
#25 /var/lib/mediawiki/includes/MediaWiki.php(517): MediaWiki->main()
#26 /var/lib/mediawiki/index.php(46): MediaWiki->run()
#27 {main}

Exception caught inside exception handler: [5392bdbd55979fde16fd4ee6] /index.php?title=Konstant%C4%ABns_Luben%C4%8Denko&action=edit 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/MessageCache.php(472): wfGetDB(integer, string)
#3 /var/lib/mediawiki/includes/cache/MessageCache.php(427): MessageCache->loadFromDB(string, NULL)
#4 /var/lib/mediawiki/includes/cache/MessageCache.php(350): MessageCache->loadFromDBWithLock(string, array, NULL)
#5 /var/lib/mediawiki/includes/cache/MessageCache.php(1031): MessageCache->load(string)
#6 /var/lib/mediawiki/includes/cache/MessageCache.php(958): MessageCache->getMsgFromNamespace(string, 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/OutputPage.php(924): Message->text()
#13 /var/lib/mediawiki/includes/OutputPage.php(971): OutputPage->setHTMLTitle(Message)
#14 /var/lib/mediawiki/includes/OutputPage.php(2742): OutputPage->setPageTitle(string)
#15 /var/lib/mediawiki/includes/exception/MWExceptionRenderer.php(125): OutputPage->prepareErrorPage(string)
#16 /var/lib/mediawiki/includes/exception/MWExceptionRenderer.php(53): MWExceptionRenderer::reportHTML(Wikimedia\Rdbms\DBQueryError)
#17 /var/lib/mediawiki/includes/exception/MWExceptionHandler.php(98): MWExceptionRenderer::output(Wikimedia\Rdbms\DBQueryError, integer)
#18 /var/lib/mediawiki/includes/exception/MWExceptionHandler.php(172): MWExceptionHandler::report(Wikimedia\Rdbms\DBQueryError)
#19 /var/lib/mediawiki/includes/MediaWiki.php(544): MWExceptionHandler::handleException(Wikimedia\Rdbms\DBQueryError)
#20 /var/lib/mediawiki/index.php(46): MediaWiki->run()
#21 {main}