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 page_id,page_namespace,page_title,page_is_redirect,page_len,page_latest FROM `page` WHERE (page_namespace = '0' AND page_title IN ('Agricultural_Processing','Greenhouse_Gas_Emissions_from_Agriculture','Energy_Needs_in_Smallholder_Agriculture','Powering_Agriculture:_Irrigation','Solar_Drying','Cooling_for_Agriculture','Literature_Analysis:_Energy_in_Agriculture','Energy_Efficiency_Introduction','Renewable_Energy_Resources_in_Powering_Agriculture','Renewable_Energy_Resources_in_Powering_Agriculture','Bioenergy_Resources_and_Technologies','Energy_Efficiency_Introduction','Energy_Auditing','Policies_and_Regulations_for_the_Energy-Agriculture_Nexus','Comparison_of_Various_Policy_Tools_for_Promoting_Renewable_Energies','Techno-Economic_Analysis_in_Agricultural_Value_Chains','Techno-Economic_Analysis_in_Agricultural_Value_Chains','Business_Models_for_the_Energy-Agriculture_Nexus','Opportunities_for_Agri-Food_Chains_to_become_Energy-Smart','Powering_Agriculture:_An_Energy_Grand_Challenge_for_Development','Manual_and_Tools_for_Promoting_SPIS_–_Stocktaking_and_Analysis_Report') )
Function: LinkHolderArray::replaceInternal
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 page_id...', 'LinkHolderArray...', false)
#1 /var/www/ISWiki/prod/current/lib/includes/db/Database.php(1358): DatabaseBase->query('SELECT page_id...', 'LinkHolderArray...')
#2 /var/www/ISWiki/prod/current/lib/includes/parser/LinkHolderArray.php(316): DatabaseBase->select('page', Array, '(page_namespace...', 'LinkHolderArray...')
#3 /var/www/ISWiki/prod/current/lib/includes/parser/LinkHolderArray.php(238): LinkHolderArray->replaceInternal('<p>How can we p...')
#4 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(4772): LinkHolderArray->replace('<p>How can we p...')
#5 /var/www/ISWiki/prod/current/lib/includes/parser/Parser.php(362): Parser->replaceLinkHolders('<p>How can we p...')
#6 /var/www/ISWiki/prod/current/lib/includes/WikiPage.php(2914): Parser->parse('?How can we pro...', Object(Title), Object(ParserOptions), true, true, 159871)
#7 /var/www/ISWiki/prod/current/lib/includes/PoolCounter.php(187): PoolWorkArticleView->doWork()
#8 /var/www/ISWiki/prod/current/lib/includes/Article.php(587): PoolCounterWork->execute()
#9 /var/www/ISWiki/prod/current/lib/includes/actions/ViewAction.php(40): Article->view()
#10 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(484): ViewAction->show()
#11 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(278): MediaWiki->performAction(Object(Article))
#12 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(593): MediaWiki->performRequest()
#13 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(503): MediaWiki->main()
#14 /var/www/ISWiki/prod/current/lib/index.php(58): MediaWiki->run()
#15 {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}