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(Cannot access the database)

Backtrace:

#0 /usr/share/mediawiki26/includes/db/DatabaseMysqlBase.php(97): DatabaseBase->reportConnectionError(':real_connect()...')
#1 /usr/share/mediawiki26/includes/db/DatabaseMysqlBase.php(592): DatabaseMysqlBase->open('10.0.87.58', 'wikiuser', 'U5-+eRz21112cWp', 'tdwg_terms')
#2 /usr/share/mediawiki26/includes/db/Database.php(1050): DatabaseMysqlBase->ping()
#3 /usr/share/mediawiki26/includes/db/Database.php(1600): DatabaseBase->query('SELECT  smw_id,...', 'SMWSql3SmwIds::...')
#4 /usr/share/mediawiki26/includes/db/Database.php(1689): DatabaseBase->select('smw_object_ids', Array, Array, 'SMWSql3SmwIds::...', Array, Array)
#5 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/src/MediaWiki/Database.php(268): DatabaseBase->selectRow('smw_object_ids', Array, Array, 'SMWSql3SmwIds::...', Array, Array)
#6 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SQLStore/SMW_Sql3SmwIds.php(409): SMW\MediaWiki\Database->selectRow('smw_object_ids', Array, Array, 'SMWSql3SmwIds::...')
#7 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SQLStore/SMW_Sql3SmwIds.php(316): SMWSql3SmwIds->getDatabaseIdAndSort('terms-internal:...', 102, '', '', '', true, false)
#8 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SQLStore/SMW_Sql3SmwIds.php(501): SMWSql3SmwIds->getSMWPageIDandSort('terms-internal:...', 102, '', '', '', true, false)
#9 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SQLStore/SMW_SQLStore3_Readers.php(202): SMWSql3SmwIds->getSMWPageID('terms-internal:...', 102, '', '', true)
#10 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/src/SQLStore/Lookup/CachedValueLookupStore.php(227): SMWSQLStore3Readers->getPropertyValues(Object(SMW\DIWikiPage), Object(SMW\DIProperty), NULL)
#11 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SQLStore/SMW_SQLStore3.php(262): SMW\SQLStore\Lookup\CachedValueLookupStore->getPropertyValues(Object(SMW\DIWikiPage), Object(SMW\DIProperty), NULL)
#12 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/dataitems/SMW_DI_Property.php(261): SMWSQLStore3->getPropertyValues(Object(SMW\DIWikiPage), Object(SMW\DIProperty))
#13 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/src/SQLStore/PropertyTableInfoFetcher.php(167): SMW\DIProperty->findPropertyTypeID()
#14 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SQLStore/SMW_SQLStore3.php(564): SMW\SQLStore\PropertyTableInfoFetcher->findTableIdForProperty(Object(SMW\DIProperty))
#15 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SQLStore/SMW_SQLStore3_Readers.php(212): SMWSQLStore3->findPropertyTableID(Object(SMW\DIProperty))
#16 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/src/SQLStore/Lookup/CachedValueLookupStore.php(227): SMWSQLStore3Readers->getPropertyValues(Object(SMW\DIWikiPage), Object(SMW\DIProperty), NULL)
#17 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SQLStore/SMW_SQLStore3.php(262): SMW\SQLStore\Lookup\CachedValueLookupStore->getPropertyValues(Object(SMW\DIWikiPage), Object(SMW\DIProperty), NULL)
#18 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SMW_ResultArray.php(219): SMWSQLStore3->getPropertyValues(Object(SMW\DIWikiPage), Object(SMW\DIProperty), NULL)
#19 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SMW_ResultArray.php(110): SMWResultArray->loadContent()
#20 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/storage/SMW_ResultArray.php(139): SMWResultArray->getNextDataItem()
#21 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/queryprinters/ListResultPrinter.php(343): SMWResultArray->getNextDataValue()
#22 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/queryprinters/ListResultPrinter.php(286): SMW\ListResultPrinter->getRowListContent(Array)
#23 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/queryprinters/ListResultPrinter.php(170): SMW\ListResultPrinter->getRowText(Array, Object(SMWQueryResult))
#24 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/queryprinters/ResultPrinter.php(250): SMW\ListResultPrinter->getResultText(Object(SMWQueryResult), 2)
#25 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/queryprinters/ResultPrinter.php(215): SMW\ResultPrinter->buildResult(Object(SMWQueryResult))
#26 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/query/SMW_QueryProcessor.php(516): SMW\ResultPrinter->getResult(Object(SMWQueryResult), Array, 2)
#27 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/parserhooks/AskParserFunction.php(163): SMWQueryProcessor::getResultFromQuery(Object(SMWQuery), Array, 2, 1)
#28 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/includes/parserhooks/AskParserFunction.php(120): SMW\AskParserFunction->doFetchResultsForRawParameters(Array)
#29 /usr/share/mediawiki26/extensions-rich-features/SemanticMediaWiki/src/ParserFunctionFactory.php(248): SMW\AskParserFunction->parse(Array)
#30 [internal function]: SMW\ParserFunctionFactory->SMW\{closure}(Object(Parser), '[[Category:Conc...', 'format=list', 'sep= &nbsp...', 'default=', 'intro='''By con...', '?terms-internal...', 'mainlabel=-', 'searchlabel=&#3...', 'limit=500')
#31 /usr/share/mediawiki26/includes/parser/Parser.php(3789): call_user_func_array(Object(Closure), Array)
#32 /usr/share/mediawiki26/includes/parser/Parser.php(3523): Parser->callParserFunction(Object(PPTemplateFrame_DOM), '#ask', Array)
#33 /usr/share/mediawiki26/includes/parser/Preprocessor_DOM.php(1177): Parser->braceSubstitution(Array, Object(PPTemplateFrame_DOM))
#34 /usr/share/mediawiki26/extensions-rich-features/ParserFunctions/ParserFunctions_body.php(188): PPFrame_DOM->expand(Object(PPNode_DOM))
#35 [internal function]: ExtParserFunctions::switchObj(Object(Parser), Object(PPTemplateFrame_DOM), Array)
#36 /usr/share/mediawiki26/includes/parser/Parser.php(3789): call_user_func_array('ExtParserFuncti...', Array)
#37 /usr/share/mediawiki26/includes/parser/Parser.php(3523): Parser->callParserFunction(Object(PPTemplateFrame_DOM), '#switch', Array)
#38 /usr/share/mediawiki26/includes/parser/Preprocessor_DOM.php(1177): Parser->braceSubstitution(Array, Object(PPTemplateFrame_DOM))
#39 /usr/share/mediawiki26/includes/parser/Parser.php(3665): PPFrame_DOM->expand(Object(PPNode_DOM))
#40 /usr/share/mediawiki26/includes/parser/Preprocessor_DOM.php(1177): Parser->braceSubstitution(Array, Object(PPFrame_DOM))
#41 /usr/share/mediawiki26/includes/parser/Parser.php(3342): PPFrame_DOM->expand(Object(PPNode_DOM), 0)
#42 /usr/share/mediawiki26/includes/parser/Parser.php(1239): Parser->replaceVariables('{{Concept schem...')
#43 /usr/share/mediawiki26/includes/parser/Parser.php(439): Parser->internalParse('{{Concept schem...')
#44 /usr/share/mediawiki26/includes/content/WikitextContent.php(331): Parser->parse('{{Concept schem...', Object(Title), Object(ParserOptions), true, true, 46867)
#45 /usr/share/mediawiki26/includes/content/AbstractContent.php(497): WikitextContent->fillParserOutput(Object(Title), 46867, Object(ParserOptions), true, Object(ParserOutput))
#46 /usr/share/mediawiki26/includes/poolcounter/PoolWorkArticleView.php(140): AbstractContent->getParserOutput(Object(Title), 46867, Object(ParserOptions))
#47 /usr/share/mediawiki26/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#48 /usr/share/mediawiki26/includes/page/Article.php(676): PoolCounterWork->execute()
#49 /usr/share/mediawiki26/includes/actions/ViewAction.php(44): Article->view()
#50 /usr/share/mediawiki26/includes/MediaWiki.php(490): ViewAction->show()
#51 /usr/share/mediawiki26/includes/MediaWiki.php(287): MediaWiki->performAction(Object(Article), Object(Title))
#52 /usr/share/mediawiki26/includes/MediaWiki.php(714): MediaWiki->performRequest()
#53 /usr/share/mediawiki26/includes/MediaWiki.php(508): MediaWiki->main()
#54 /usr/share/mediawiki26/index.php(41): MediaWiki->run()
#55 {main}
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