Exception encountered, of type "PDOException"
[2fb0baa8ea5b6d35dc9efade] /index.php?diff=prev&oldid=329186&title=%E9%A6%96%E9%83%BD%E5%9C%8F%E3%82%A8%E3%83%AA%E3%82%A2%2F%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%2F%E6%9D%B1%E8%A5%BF%E7%B7%9A PDOException from line 309 of /var/www/html/mediawiki/includes/title/MediaWikiTitleCodec.php: SQLSTATE[HY000] [1040] Too many connections
Backtrace:
#0 /var/www/html/mediawiki/includes/title/MediaWikiTitleCodec.php(309): PDO->__construct(string, string, string)
#1 /var/www/html/mediawiki/includes/Title.php(3343): MediaWikiTitleCodec->splitTitleString(string, integer)
#2 /var/www/html/mediawiki/includes/Title.php(332): Title->secureAndSplit()
#3 /var/www/html/mediawiki/includes/Title.php(287): Title::newFromTextThrow(string, integer)
#4 /var/www/html/mediawiki/includes/parser/Parser.php(2189): Title::newFromText(string)
#5 /var/www/html/mediawiki/includes/parser/Parser.php(2039): Parser->replaceInternalLinks2(string)
#6 /var/www/html/mediawiki/includes/parser/Parser.php(1271): Parser->replaceInternalLinks(string)
#7 /var/www/html/mediawiki/includes/parser/Parser.php(446): Parser->internalParse(string)
#8 /var/www/html/mediawiki/includes/content/WikitextContent.php(331): Parser->parse(string, Title, ParserOptions, boolean, boolean, integer)
#9 /var/www/html/mediawiki/includes/content/AbstractContent.php(497): WikitextContent->fillParserOutput(Title, integer, ParserOptions, boolean, ParserOutput)
#10 /var/www/html/mediawiki/includes/poolcounter/PoolWorkArticleView.php(139): AbstractContent->getParserOutput(Title, integer, ParserOptions)
#11 /var/www/html/mediawiki/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#12 /var/www/html/mediawiki/includes/page/WikiPage.php(1076): PoolCounterWork->execute()
#13 /var/www/html/mediawiki/includes/diff/DifferenceEngine.php(636): WikiPage->getParserOutput(ParserOptions, integer)
#14 /var/www/html/mediawiki/includes/diff/DifferenceEngine.php(614): DifferenceEngine->getParserOutput(WikiPage, Revision)
#15 /var/www/html/mediawiki/includes/diff/DifferenceEngine.php(456): DifferenceEngine->renderNewRevision()
#16 /var/www/html/mediawiki/includes/page/Article.php(787): DifferenceEngine->showDiffPage(boolean)
#17 /var/www/html/mediawiki/includes/page/Article.php(498): Article->showDiffPage()
#18 /var/www/html/mediawiki/includes/actions/ViewAction.php(44): Article->view()
#19 /var/www/html/mediawiki/includes/MediaWiki.php(503): ViewAction->show()
#20 /var/www/html/mediawiki/includes/MediaWiki.php(288): MediaWiki->performAction(Article, Title)
#21 /var/www/html/mediawiki/includes/MediaWiki.php(745): MediaWiki->performRequest()
#22 /var/www/html/mediawiki/includes/MediaWiki.php(519): MediaWiki->main()
#23 /var/www/html/mediawiki/index.php(43): MediaWiki->run()
#24 {main}