MediaWiki internal error.

Original exception: exception 'DBQueryError' with message 'A database error has occurred
Query: DELETE FROM objectcache WHERE keyname='dragons_exodus:messages:en'
Function: MediaWikiBagOStuff::_doquery
Error: 5 database is locked
' in /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/db/Database.php:661
Stack trace:
#0 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/db/Database.php(616): Database->reportQueryError('database is loc...', 5, 'DELETE FROM obj...', 'MediaWikiBagOSt...', false)
#1 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/BagOStuff.php(454): Database->query('DELETE FROM obj...', 'MediaWikiBagOSt...')
#2 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/BagOStuff.php(324): MediaWikiBagOStuff->_doquery('DELETE FROM obj...')
#3 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/BagOStuff.php(292): SqlBagOStuff->_query('DELETE FROM $0 ...', 'dragons_exodus:...')
#4 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/BagOStuff.php(251): SqlBagOStuff->delete('dragons_exodus:...')
#5 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/MessageCache.php(245): SqlBagOStuff->get('dragons_exodus:...')
#6 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/MessageCache.php(589): MessageCache->load('en')
#7 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/MessageCache.php(526): MessageCache->getMsgFromNamespace('Missing-article', 'en')
#8 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/GlobalFunctions.php(598): MessageCache->get('missing-article', true, false)
#9 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/GlobalFunctions.php(563): wfMsgGetKey('missing-article', true, false, true)
#10 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/GlobalFunctions.php(469): wfMsgReal('missing-article', Array, true)
#11 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Article.php(444): wfMsg('missing-article', 'Archives:Contri...', '')
#12 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Article.php(339): Article->fetchContent(0)
#13 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Article.php(226): Article->loadContent()
#14 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Article.php(882): Article->getContent()
#15 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Wiki.php(451): Article->view()
#16 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Wiki.php(63): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#17 /home/editthis/www/editthis.info/mediawiki-1.15.1/index.php(171): MediaWiki->initialize(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#18 {main}

Exception caught inside exception handler: exception 'PDOException' with message 'There is already an active transaction' in /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/db/DatabaseSqlite.php:347
Stack trace:
#0 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/db/DatabaseSqlite.php(347): PDO->beginTransaction()
#1 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/BagOStuff.php(448): DatabaseSqlite->begin()
#2 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/BagOStuff.php(274): MediaWikiBagOStuff->_begin()
#3 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/BagOStuff.php(100): SqlBagOStuff->set('dragons_exodus:...', 1, 10)
#4 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/MessageCache.php(471): BagOStuff->add('dragons_exodus:...', 1, 10)
#5 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/MessageCache.php(261): MessageCache->lock('dragons_exodus:...')
#6 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/MessageCache.php(589): MessageCache->load('en')
#7 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/MessageCache.php(526): MessageCache->getMsgFromNamespace('Databaseerror', 'en')
#8 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/GlobalFunctions.php(598): MessageCache->get('databaseerror', true, false)
#9 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/GlobalFunctions.php(563): wfMsgGetKey('databaseerror', true, false, true)
#10 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Exception.php(70): wfMsgReal('databaseerror', Array)
#11 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/db/Database.php(2721): MWException->msg('databaseerror', 'Database error')
#12 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Exception.php(148): DBQueryError->getPageTitle()
#13 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Exception.php(186): MWException->reportHTML()
#14 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Exception.php(284): MWException->report()
#15 /home/editthis/www/editthis.info/mediawiki-1.15.1/includes/Exception.php(344): wfReportException(Object(DBQueryError))
#16 [internal function]: wfExceptionHandler(Object(DBQueryError))
#17 {main}