Accessing https://fedoraproject.org/wiki/Architectures, I often get this error (but not always):
MediaWiki internal error. Original exception: [ZuvbCSer93RCVHVMl8GfVgAAAZY] /wiki/Architectures Wikimedia\Rdbms\DBConnectionError: Cannot access the database: Too many connections (db03) Backtrace: from /usr/share/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1149) #0 /usr/share/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(805): Wikimedia\Rdbms\LoadBalancer->reportConnectionError() #1 /usr/share/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(793): Wikimedia\Rdbms\LoadBalancer->getServerConnection() #2 /usr/share/mediawiki/includes/libs/rdbms/database/DBConnRef.php(99): Wikimedia\Rdbms\LoadBalancer->getConnectionInternal() #3 /usr/share/mediawiki/includes/libs/rdbms/database/DBConnRef.php(117): Wikimedia\Rdbms\DBConnRef->ensureConnection() #4 /usr/share/mediawiki/includes/libs/rdbms/database/DBConnRef.php(369): Wikimedia\Rdbms\DBConnRef->__call() #5 /usr/share/mediawiki/includes/page/WikiPage.php(358): Wikimedia\Rdbms\DBConnRef->selectRow() #6 /usr/share/mediawiki/includes/page/WikiPage.php(386): WikiPage->pageData() #7 /usr/share/mediawiki/includes/page/WikiPage.php(426): WikiPage->pageDataFromTitle() #8 /usr/share/mediawiki/includes/page/WikiPage.php(542): WikiPage->loadPageData() #9 /usr/share/mediawiki/includes/page/WikiPage.php(614): WikiPage->exists() #10 /usr/share/mediawiki/includes/page/WikiPage.php(251): WikiPage->getContentModel() #11 /usr/share/mediawiki/includes/MediaWiki.php(480): WikiPage->getContentHandler() #12 /usr/share/mediawiki/includes/MediaWiki.php(361): MediaWiki->initializeArticle() #13 /usr/share/mediawiki/includes/MediaWiki.php(960): MediaWiki->performRequest() #14 /usr/share/mediawiki/includes/MediaWiki.php(613): MediaWiki->main() #15 /usr/share/mediawiki/index.php(50): MediaWiki->run() #16 /usr/share/mediawiki/index.php(46): wfIndexMain() #17 {main} Exception caught inside exception handler: [ZuvbCSer93RCVHVMl8GfVgAAAZY] /wiki/Architectures Wikimedia\Rdbms\DBConnectionError: Cannot access the database: Too many connections (db03) Backtrace: from /usr/share/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1149) #0 /usr/share/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(805): Wikimedia\Rdbms\LoadBalancer->reportConnectionError() #1 /usr/share/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(793): Wikimedia\Rdbms\LoadBalancer->getServerConnection() #2 /usr/share/mediawiki/includes/libs/rdbms/database/DBConnRef.php(99): Wikimedia\Rdbms\LoadBalancer->getConnectionInternal() #3 /usr/share/mediawiki/includes/libs/rdbms/database/DBConnRef.php(117): Wikimedia\Rdbms\DBConnRef->ensureConnection() #4 /usr/share/mediawiki/includes/libs/rdbms/database/DBConnRef.php(338): Wikimedia\Rdbms\DBConnRef->__call() #5 /usr/share/mediawiki/includes/libs/rdbms/querybuilder/SelectQueryBuilder.php(725): Wikimedia\Rdbms\DBConnRef->selectField() #6 /usr/share/mediawiki/includes/language/LCStoreDB.php(65): Wikimedia\Rdbms\SelectQueryBuilder->fetchField() #7 /usr/share/mediawiki/includes/language/LocalisationCache.php(559): LCStoreDB->get() #8 /usr/share/mediawiki/includes/language/LocalisationCache.php(606): LocalisationCache->isExpired() #9 /usr/share/mediawiki/includes/language/LocalisationCache.php(516): LocalisationCache->initLanguage() #10 /usr/share/mediawiki/includes/language/LocalisationCache.php(396): LocalisationCache->loadSubitem() #11 /usr/share/mediawiki/includes/language/MessageCache.php(745): LocalisationCache->getSubitem() #12 /usr/share/mediawiki/includes/language/MessageCache.php(1323): MessageCache->isMainCacheable() #13 /usr/share/mediawiki/includes/language/MessageCache.php(1205): MessageCache->getMsgFromNamespace() #14 /usr/share/mediawiki/includes/language/MessageCache.php(1177): MessageCache->getMessageForLang() #15 /usr/share/mediawiki/includes/language/MessageCache.php(1072): MessageCache->getMessageFromFallbackChain() #16 /usr/share/mediawiki/includes/language/Message.php(1485): MessageCache->get() #17 /usr/share/mediawiki/includes/language/Message.php(972): Message->fetchMessage() #18 /usr/share/mediawiki/includes/language/Message.php(1059): Message->format() #19 /usr/share/mediawiki/includes/exception/MWExceptionRenderer.php(254): Message->text() #20 /usr/share/mediawiki/includes/exception/MWExceptionRenderer.php(398): MWExceptionRenderer::msg() #21 /usr/share/mediawiki/includes/exception/MWExceptionRenderer.php(103): MWExceptionRenderer::reportOutageHTML() #22 /usr/share/mediawiki/includes/exception/MWExceptionHandler.php(134): MWExceptionRenderer::output() #23 /usr/share/mediawiki/includes/exception/MWExceptionHandler.php(251): MWExceptionHandler::report() #24 /usr/share/mediawiki/includes/MediaWiki.php(632): MWExceptionHandler::handleException() #25 /usr/share/mediawiki/index.php(50): MediaWiki->run() #26 /usr/share/mediawiki/index.php(46): wfIndexMain() #27 {main}
When I reload the page, it’s about a coin toss (50%/50%) if the page loads successfully or runs into the error. I get either via the same proxies.
This should display the page instead.
Soon
Metadata Update from @zlopez: - Issue priority set to: Waiting on Assignee (was: Needs Review) - Issue tagged with: Needs investigation
This is happening only for some proxies, if you hit the working ones it will redirect you without issue.
It seems that this was resolved by itself. I don't see any more alerts in nagios. Could you confirm that it's working for you?
So, in the past this has been when database backups are running, the wiki is slow/unresponsive. ;(
It may be that there's some kind of leak in mariadb and restarting it will help... I did so, so I guess we can see if it happens the next database backup window.
I don’t get these errors anymore.
Metadata Update from @nphilipp: - Issue close_status updated to: Fixed - Issue status updated to: Closed (was: Open)
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