A few hundred errors per hour: https://logstash.wikimedia.org/goto/ca11f5e07ffa274656d7dbf5548e34d4
Seems somehow related to GrowthExperiments community configuration:
from /srv/mediawiki/php-1.39.0-wmf.26/includes/language/LocalisationCache.php(515) #0 /srv/mediawiki/php-1.39.0-wmf.26/includes/language/LocalisationCache.php(373): LocalisationCache->initLanguage(string) #1 /srv/mediawiki/php-1.39.0-wmf.26/includes/language/LocalisationCache.php(314): LocalisationCache->loadItem(string, string) #2 /srv/mediawiki/php-1.39.0-wmf.26/includes/language/Language.php(664): LocalisationCache->getItem(string, string) #3 /srv/mediawiki/php-1.39.0-wmf.26/includes/title/MediaWikiTitleCodec.php(119): Language->needsGenderDistinction() #4 /srv/mediawiki/php-1.39.0-wmf.26/includes/title/MediaWikiTitleCodec.php(156): MediaWikiTitleCodec->getNamespaceName(integer, string) #5 /srv/mediawiki/php-1.39.0-wmf.26/includes/cache/LinkCache.php(114): MediaWikiTitleCodec->formatTitle(integer, string) #6 /srv/mediawiki/php-1.39.0-wmf.26/includes/cache/LinkCache.php(234): LinkCache->getCacheKey(array, boolean) #7 /srv/mediawiki/php-1.39.0-wmf.26/includes/page/PageStore.php(177): LinkCache->isBadLink(array) #8 /srv/mediawiki/php-1.39.0-wmf.26/includes/page/PageStore.php(154): MediaWiki\Page\PageStore->getPageByNameViaLinkCache(integer, string, integer) #9 /srv/mediawiki/php-1.39.0-wmf.26/includes/page/PageStore.php(326): MediaWiki\Page\PageStore->getPageByName(integer, string, integer) #10 /srv/mediawiki/php-1.39.0-wmf.26/includes/Title.php(4103): MediaWiki\Page\PageStore->getPageByReference(Title, integer) #11 /srv/mediawiki/php-1.39.0-wmf.26/includes/Title.php(1098): Title->getFieldFromPageStore(string, integer) #12 /srv/mediawiki/php-1.39.0-wmf.26/includes/Title.php(1115): Title->getContentModel() #13 /srv/mediawiki/php-1.39.0-wmf.26/includes/Title.php(1573): Title->hasContentModel(string) #14 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/includes/Config/WikiPageConfig.php(63): Title->isSiteJsonConfigPage() #15 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/includes/Config/WikiPageConfig.php(86): GrowthExperiments\Config\WikiPageConfig->getConfigTitle() #16 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/includes/Config/WikiPageConfig.php(153): GrowthExperiments\Config\WikiPageConfig->getConfigData(integer) #17 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/includes/Config/GrowthExperimentsMultiConfig.php(113): GrowthExperiments\Config\WikiPageConfig->hasWithFlags(string, integer) #18 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/includes/Config/GrowthExperimentsMultiConfig.php(96): GrowthExperiments\Config\GrowthExperimentsMultiConfig->getWithFlags(string) #19 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/ServiceWiring.php(468): GrowthExperiments\Config\GrowthExperimentsMultiConfig->get(string) #20 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(447): Wikimedia\Services\ServiceContainer::{closure}(MediaWiki\MediaWikiServices) #21 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(411): Wikimedia\Services\ServiceContainer->createService(string) #22 /srv/mediawiki/php-1.39.0-wmf.26/includes/MediaWikiServices.php(299): Wikimedia\Services\ServiceContainer->getService(string) #23 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(419): MediaWiki\MediaWikiServices->getService(string) #24 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/includes/GrowthExperimentsServices.php(175): Wikimedia\Services\ServiceContainer->get(string) #25 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/ServiceWiring.php(444): GrowthExperiments\GrowthExperimentsServices->getMentorProviderWikitext() #26 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(447): Wikimedia\Services\ServiceContainer::{closure}(MediaWiki\MediaWikiServices) #27 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(411): Wikimedia\Services\ServiceContainer->createService(string) #28 /srv/mediawiki/php-1.39.0-wmf.26/includes/MediaWikiServices.php(299): Wikimedia\Services\ServiceContainer->getService(string) #29 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(419): MediaWiki\MediaWikiServices->getService(string) #30 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/includes/GrowthExperimentsServices.php(167): Wikimedia\Services\ServiceContainer->get(string) #31 /srv/mediawiki/php-1.39.0-wmf.26/extensions/GrowthExperiments/ServiceWiring.php(426): GrowthExperiments\GrowthExperimentsServices->getMentorProvider() #32 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(447): Wikimedia\Services\ServiceContainer::{closure}(MediaWiki\MediaWikiServices) #33 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(411): Wikimedia\Services\ServiceContainer->createService(string) #34 /srv/mediawiki/php-1.39.0-wmf.26/includes/MediaWikiServices.php(299): Wikimedia\Services\ServiceContainer->getService(string) #35 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/services/src/ServiceContainer.php(419): MediaWiki\MediaWikiServices->getService(string) #36 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/object-factory/src/ObjectFactory.php(211): Wikimedia\Services\ServiceContainer->get(string) #37 /srv/mediawiki/php-1.39.0-wmf.26/vendor/wikimedia/object-factory/src/ObjectFactory.php(152): Wikimedia\ObjectFactory\ObjectFactory::getObjectFromSpec(array, array) #38 /srv/mediawiki/php-1.39.0-wmf.26/includes/HookContainer/HookContainer.php(473): Wikimedia\ObjectFactory\ObjectFactory->createObject(array) #39 /srv/mediawiki/php-1.39.0-wmf.26/includes/HookContainer/HookContainer.php(156): MediaWiki\HookContainer\HookContainer->getHandlers(string, array) #40 /srv/mediawiki/php-1.39.0-wmf.26/includes/HookContainer/HookRunner.php(4133): MediaWiki\HookContainer\HookContainer->run(string, array) #41 /srv/mediawiki/php-1.39.0-wmf.26/includes/user/DefaultOptionsLookup.php(110): MediaWiki\HookContainer\HookRunner->onUserGetDefaultOptions(array) #42 /srv/mediawiki/php-1.39.0-wmf.26/includes/user/UserOptionsManager.php(596): MediaWiki\User\DefaultOptionsLookup->getDefaultOptions() #43 /srv/mediawiki/php-1.39.0-wmf.26/includes/user/UserOptionsManager.php(498): MediaWiki\User\UserOptionsManager->loadOriginalOptions(User, integer, NULL) #44 /srv/mediawiki/php-1.39.0-wmf.26/includes/user/UserOptionsManager.php(148): MediaWiki\User\UserOptionsManager->loadUserOptions(User, integer) #45 /srv/mediawiki/php-1.39.0-wmf.26/includes/context/RequestContext.php(460): MediaWiki\User\UserOptionsManager->getOption(User, string) #46 /srv/mediawiki/php-1.39.0-wmf.26/includes/StubUserLang.php(34): RequestContext->getLanguage() #47 /srv/mediawiki/php-1.39.0-wmf.26/includes/StubObject.php(223): StubUserLang->_newObject() #48 /srv/mediawiki/php-1.39.0-wmf.26/includes/StubObject.php(103): StubObject->_unstub(string, integer) #49 /srv/mediawiki/php-1.39.0-wmf.26/includes/content/ContentHandler.php(727): StubObject::unstub(StubUserLang) #50 /srv/mediawiki/php-1.39.0-wmf.26/includes/Title.php(3944): ContentHandler->getPageLanguage(Title) #51 /srv/mediawiki/php-1.39.0-wmf.26/includes/OutputPage.php(2538): Title->getPageLanguage() #52 /srv/mediawiki/php-1.39.0-wmf.26/includes/OutputPage.php(2670): OutputPage->addAcceptLanguage() #53 /srv/mediawiki/php-1.39.0-wmf.26/includes/OutputPage.php(2781): OutputPage->sendCacheControl() #54 /srv/mediawiki/php-1.39.0-wmf.26/includes/MediaWiki.php(1008): OutputPage->output() #55 /srv/mediawiki/php-1.39.0-wmf.26/includes/MediaWiki.php(875): MediaWiki->maybeDoHttpsRedirect() #56 /srv/mediawiki/php-1.39.0-wmf.26/includes/MediaWiki.php(562): MediaWiki->main() #57 /srv/mediawiki/php-1.39.0-wmf.26/index.php(50): MediaWiki->run() #58 /srv/mediawiki/php-1.39.0-wmf.26/index.php(46): wfIndexMain() #59 /srv/mediawiki/w/index.php(3): require(string) #60 {main}
Started happening at UTC 14h: