MediaWiki internal error.
Original exception: exception 'DBQueryError' with message 'A database error has occurred. Did you forget to run maintenance/update.php after upgrading? See: https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script
Query: SELECT rev_id,rev_page,rev_text_id,rev_timestamp,rev_comment,rev_user_text,rev_user,rev_minor_edit,rev_deleted,rev_len,rev_parent_id,rev_sha1,page_namespace,page_title,page_id,page_latest,user_name FROM `revision` INNER JOIN `page` ON ((page_id = rev_page)) LEFT JOIN `webmol_energypedia`.`user` ON ((rev_user != 0) AND (user_id = rev_user)) WHERE page_namespace = '10' AND page_title = 'CES_Country_Access_to_Electricity' AND (rev_id=page_latest) LIMIT 1
Function: Revision::fetchFromConds
Error: 1927 Lost connection to backend server: connection closed by peer (server3: Generated event) (database_maxscale:4006)
' in /var/www/ISWiki/prod/current/lib/includes/db/Database.php:918
Stack trace:
#0 /var/www/ISWiki/prod/current/lib/includes/db/Database.php(885): DatabaseBase->reportQueryError('Lost connection...', 1927, 'SELECT rev_id,...', 'Revision::fetch...', false)
#1 /var/www/ISWiki/prod/current/lib/includes/db/Database.php(1358): DatabaseBase->query('SELECT rev_id,...', 'Revision::fetch...')
#2 /var/www/ISWiki/prod/current/lib/includes/Revision.php(298): DatabaseBase->select(Array, Array, Array, 'Revision::fetch...', Array, Array)
#3 /var/www/ISWiki/prod/current/lib/includes/Revision.php(247): Revision::fetchFromConds(Object(DatabaseMysql), Array)
#4 /var/www/ISWiki/prod/current/lib/includes/Revision.php(230): Revision::loadFromConds(Object(DatabaseMysql), Array)
#5 /var/www/ISWiki/prod/current/lib/includes/Revision.php(75): Revision::newFromConds(Array)
#6 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(3513): Revision::newFromTitle(Object(Title))
#7 [internal function]: Parser->statelessFetchTemplate(Object(Title), Object(Parser))
#8 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(3459): call_user_func(Array, Object(Title), Object(Parser))
#9 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(3434): Parser->fetchTemplateAndTitle(Object(Title))
#10 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(3293): Parser->getTemplateDom(Object(Title))
#11 /var/www/ISWiki/prod/current/lib/includes/parser/Preprocessor_DOM.php(1043): Parser->braceSubstitution(Array, Object(PPTemplateFrame_DOM))
#12 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(3357): PPFrame_DOM->expand(Object(PPNode_DOM))
#13 /var/www/ISWiki/prod/current/lib/includes/parser/Preprocessor_DOM.php(1043): Parser->braceSubstitution(Array, Object(PPFrame_DOM))
#14 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(2986): PPFrame_DOM->expand(Object(PPNode_DOM), 0)
#15 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(1099): Parser->replaceVariables('{{CES Country|C...')
#16 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(345): Parser->internalParse('{{CES Country|C...')
#17 /var/www/ISWiki/prod/current/lib/includes/WikiPage.php(2914): Parser->parse('{{CES Country|C...', Object(Title), Object(ParserOptions), true, true, 108336)
#18 /var/www/ISWiki/prod/current/lib/includes/PoolCounter.php(187): PoolWorkArticleView->doWork()
#19 /var/www/ISWiki/prod/current/lib/includes/WikiPage.php(862): PoolCounterWork->execute()
#20 /var/www/ISWiki/prod/current/lib/includes/diff/DifferenceEngine.php(523): WikiPage->getParserOutput(Object(ParserOptions), 108336)
#21 /var/www/ISWiki/prod/current/lib/includes/diff/DifferenceEngine.php(387): DifferenceEngine->renderNewRevision()
#22 /var/www/ISWiki/prod/current/lib/includes/Article.php(682): DifferenceEngine->showDiffPage(false)
#23 /var/www/ISWiki/prod/current/lib/includes/Article.php(434): Article->showDiffPage()
#24 /var/www/ISWiki/prod/current/lib/includes/actions/ViewAction.php(40): Article->view()
#25 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(484): ViewAction->show()
#26 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(278): MediaWiki->performAction(Object(Article))
#27 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(593): MediaWiki->performRequest()
#28 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(503): MediaWiki->main()
#29 /var/www/ISWiki/prod/current/lib/index.php(58): MediaWiki->run()
#30 {main}
Exception caught inside exception handler: exception 'DBQueryError' with message 'A database error has occurred. Did you forget to run maintenance/update.php after upgrading? See: https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script
Query: SELECT value,exptime FROM `objectcache` WHERE keyname = 'webmol_energypedia:resourceloader:filter:minify-css:7:c88e2bcd56513749bec09a7e29cb3ffa' LIMIT 1
Function: SqlBagOStuff::get
Error: 1927 Lost connection to backend server: connection closed by peer (server3: Generated event) (database_maxscale:4006)
' in /var/www/ISWiki/prod/current/lib/includes/db/Database.php:918
Stack trace:
#0 /var/www/ISWiki/prod/current/lib/includes/db/Database.php(885): DatabaseBase->reportQueryError('Lost connection...', 1927, 'SELECT value,e...', 'SqlBagOStuff::g...', false)
#1 /var/www/ISWiki/prod/current/lib/includes/db/Database.php(1358): DatabaseBase->query('SELECT value,e...', 'SqlBagOStuff::g...')
#2 /var/www/ISWiki/prod/current/lib/includes/db/Database.php(1445): DatabaseBase->select('objectcache', Array, Array, 'SqlBagOStuff::g...', Array, Array)
#3 /var/www/ISWiki/prod/current/lib/includes/objectcache/SqlBagOStuff.php(124): DatabaseBase->selectRow('objectcache', Array, Array, 'SqlBagOStuff::g...')
#4 /var/www/ISWiki/prod/current/lib/includes/resourceloader/ResourceLoader.php(149): SqlBagOStuff->get('webmol_energype...')
#5 /var/www/ISWiki/prod/current/lib/includes/resourceloader/ResourceLoader.php(783): ResourceLoader->filter('minify-css', 'a:lang(ar), a:l...')
#6 /var/www/ISWiki/prod/current/lib/includes/OutputPage.php(2594): ResourceLoader->makeModuleResponse(Object(ResourceLoaderContext), Array)
#7 /var/www/ISWiki/prod/current/lib/includes/OutputPage.php(3310): OutputPage->makeResourceLoaderLink(Array, 'styles')
#8 /var/www/ISWiki/prod/current/lib/includes/OutputPage.php(2407): OutputPage->buildCssLinks()
#9 /var/www/ISWiki/prod/current/lib/includes/SkinTemplate.php(465): OutputPage->headElement(Object(SkinIswiki))
#10 /var/www/ISWiki/prod/current/lib/includes/OutputPage.php(1982): SkinTemplate->outputPage()
#11 /var/www/ISWiki/prod/current/lib/includes/Exception.php(182): OutputPage->output()
#12 /var/www/ISWiki/prod/current/lib/includes/Exception.php(209): MWException->reportHTML()
#13 /var/www/ISWiki/prod/current/lib/includes/Exception.php(490): MWException->report()
#14 /var/www/ISWiki/prod/current/lib/includes/Exception.php(569): MWExceptionHandler::report(Object(DBQueryError))
#15 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(506): MWExceptionHandler::handle(Object(DBQueryError))
#16 /var/www/ISWiki/prod/current/lib/index.php(58): MediaWiki->run()
#17 {main}