Last modified: 2012-08-26 18:33:50 UTC
This happens few times a day in twn, often when viewing diff pages. MessageCache->getMsgFromNamespace() is always present in stack trace. Exception from line 932 of /www/w/includes/db/Database.php: 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 rev_id,rev_page,rev_text_id,rev_timestamp,rev_comment,rev_user_text,rev_user,rev_minor_edit,rev_deleted,rev_len,rev_parent_id,rev_sha1,page_namespace,page_title,page_id,page_latest,page_is_redirect,page_len,user_name FROM `bw_revision` INNER JOIN `bw_page` ON ((page_id = rev_page)) LEFT JOIN `bw_user` ON ((rev_user != 0) AND (user_id = rev_user)) WHERE page_namespace = '8' AND page_title = 'Thumbnail-more/fi' AND (rev_id=page_latest) LIMIT 1 FOR UPDATE Function: Revision::fetchFromConds Error: 1213 Deadlock found when trying to get lock; try restarting transaction (localhost) #0 /www/w/includes/db/Database.php(899): DatabaseBase->reportQueryError('Deadlock found ...', 1213, 'SELECT rev_id,...', 'Revision::fetch...', false) #1 /www/w/includes/db/Database.php(1317): DatabaseBase->query('SELECT rev_id,...', 'Revision::fetch...') #2 /www/w/includes/Revision.php(332): DatabaseBase->select(Array, Array, Array, 'Revision::fetch...', Array, Array) #3 /www/w/includes/Revision.php(276): Revision::fetchFromConds(Object(DatabaseMysql), Array, 1) #4 /www/w/includes/Revision.php(256): Revision::loadFromConds(Object(DatabaseMysql), Array, 1) #5 /www/w/includes/Revision.php(100): Revision::newFromConds(Array, 1) #6 /www/w/includes/cache/MessageCache.php(774): Revision::newFromTitle(Object(Title)) #7 /www/w/includes/cache/MessageCache.php(666): MessageCache->getMsgFromNamespace('Thumbnail-more/...', 'fi') #8 /www/w/includes/GlobalFunctions.php(1504): MessageCache->get('thumbnail-more', true, false) #9 /www/w/includes/GlobalFunctions.php(1482): wfMsgGetKey('thumbnail-more', true, false, true) #10 /www/w/includes/GlobalFunctions.php(1392): wfMsgReal('thumbnail-more', Array) #11 /www/w/includes/Linker.php(844): wfMsg('thumbnail-more') #12 /www/w/includes/Linker.php(641): Linker::makeThumbLink2(Object(Title), Object(LocalFile), Array, Array, false, false) #13 /www/w/includes/parser/Parser.php(5184): Linker::makeImageLink(Object(Parser), Object(Title), Object(LocalFile), Array, Array, false, false, 2) #14 /www/w/includes/parser/Parser.php(1972): Parser->makeImage(Object(Title), 'left|thumb|My 4...', Object(LinkHolderArray)) #15 /www/w/includes/parser/Parser.php(1713): Parser->replaceInternalLinks2('<center><div la...') #16 /www/w/includes/parser/Parser.php(1156): Parser->replaceInternalLinks('<center><div la...') #17 /www/w/includes/parser/Parser.php(368): Parser->internalParse('<CENTER><div la...') #18 /www/w/includes/WikiPage.php(3065): Parser->parse('<CENTER><div la...', Object(Title), Object(ParserOptions), true, true, 4164510) #19 /www/w/includes/PoolCounter.php(209): PoolWorkArticleView->doWork() #20 /www/w/includes/WikiPage.php(1027): PoolCounterWork->execute() #21 /www/w/includes/diff/DifferenceEngine.php(547): WikiPage->getParserOutput(Object(ParserOptions), 4164510) #22 /www/w/includes/diff/DifferenceEngine.php(411): DifferenceEngine->renderNewRevision() #23 /www/w/includes/Article.php(725): DifferenceEngine->showDiffPage(false) #24 /www/w/includes/Article.php(478): Article->showDiffPage() #25 /www/w/includes/actions/ViewAction.php(37): Article->view() #26 /www/w/includes/Wiki.php(427): ViewAction->show() #27 /www/w/includes/Wiki.php(304): MediaWiki->performAction(Object(Article)) #28 /www/w/includes/Wiki.php(536): MediaWiki->performRequest() #29 /www/w/includes/Wiki.php(446): MediaWiki->main() #30 /www/w/index.php(58): MediaWiki->run() #31 {main}
There was a bit logic bug that was causing lots of FOR UPDATE selects. This was fixed in https://gerrit.wikimedia.org/r/#/c/21069/.
