MediaWiki internal error.

Original exception: exception 'PermissionsError' in /var/www/ISWiki/prod/current/lib/includes/Wiki.php:193
Stack trace:
#0 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(593): MediaWiki->performRequest()
#1 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(503): MediaWiki->main()
#2 /var/www/ISWiki/prod/current/lib/index.php(58): MediaWiki->run()
#3 {main}

Exception caught inside exception handler: exception 'DBConnectionError' with message 'DB connection error: Connection rejected: Too many connections (server1) (database_maxscale:4006)' in /var/www/ISWiki/prod/current/lib/includes/db/Database.php:746
Stack trace:
#0 /var/www/ISWiki/prod/current/lib/includes/db/LoadBalancer.php(734): DatabaseBase->reportConnectionError('Unknown error (...')
#1 /var/www/ISWiki/prod/current/lib/includes/db/LoadBalancer.php(494): LoadBalancer->reportConnectionError(Object(DatabaseMysql))
#2 /var/www/ISWiki/prod/current/lib/includes/objectcache/SqlBagOStuff.php(84): LoadBalancer->getConnection(-2)
#3 /var/www/ISWiki/prod/current/lib/includes/objectcache/SqlBagOStuff.php(121): SqlBagOStuff->getDB()
#4 /var/www/ISWiki/prod/current/lib/includes/cache/MessageCache.php(313): SqlBagOStuff->get('webmol_wocatped...')
#5 /var/www/ISWiki/prod/current/lib/includes/cache/MessageCache.php(704): MessageCache->load('en')
#6 /var/www/ISWiki/prod/current/lib/includes/cache/MessageCache.php(642): MessageCache->getMsgFromNamespace('Mainpage', 'en')
#7 /var/www/ISWiki/prod/current/lib/includes/GlobalFunctions.php(1427): MessageCache->get('mainpage', true, true)
#8 /var/www/ISWiki/prod/current/lib/includes/GlobalFunctions.php(1407): wfMsgGetKey('mainpage', true, true, true)
#9 /var/www/ISWiki/prod/current/lib/includes/GlobalFunctions.php(1373): wfMsgReal('mainpage', Array, true, true)
#10 /var/www/ISWiki/prod/current/lib/includes/Title.php(336): wfMsgForContent('mainpage')
#11 /var/www/ISWiki/prod/current/lib/includes/OutputPage.php(2094): Title::newMainPage()
#12 /var/www/ISWiki/prod/current/lib/includes/Exception.php(337): OutputPage->showPermissionsErrorPage(Array, 'read')
#13 /var/www/ISWiki/prod/current/lib/includes/Exception.php(490): PermissionsError->report()
#14 /var/www/ISWiki/prod/current/lib/includes/Exception.php(569): MWExceptionHandler::report(Object(PermissionsError))
#15 /var/www/ISWiki/prod/current/lib/includes/Wiki.php(506): MWExceptionHandler::handle(Object(PermissionsError))
#16 /var/www/ISWiki/prod/current/lib/index.php(58): MediaWiki->run()
#17 {main}