This affects page parses and some special pages. Requiring the master DB just for parsing is bad for HA and blocks active/active multi-DC use.
[GET] Expectation (masterConns <= 0) by MediaWiki::main not met: [connect to 10.64.32.28 (wikidatawiki)] TransactionProfiler.php line 307 calls wfBacktrace() TransactionProfiler.php line 146 calls TransactionProfiler->reportExpectationViolated() LoadBalancer.php line 545 calls TransactionProfiler->recordConnection() DBAccessBase.php line 61 calls LoadBalancer->getConnection() WikiPageEntityMetaDataLookup.php line 161 calls DBAccessBase->getConnection() WikiPageEntityMetaDataLookup.php line 70 calls Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup->selectRevisionInformationMultiple() PrefetchingWikiPageEntityMetaDataAccessor.php line 148 calls Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup->loadRevisionInformation() WikiPageEntityRevisionLookup.php line 78 calls Wikibase\Lib\Store\Sql\PrefetchingWikiPageEntityMetaDataAccessor->loadRevisionInformation() SpecialWikibaseRepoPage.php line 163 calls Wikibase\Lib\Store\WikiPageEntityRevisionLookup->getEntityRevision() SpecialModifyEntity.php line 127 calls Wikibase\Repo\Specials\SpecialWikibaseRepoPage->loadEntity() SpecialSetSiteLink.php line 103 calls Wikibase\Repo\Specials\SpecialModifyEntity->prepareArguments() SpecialModifyEntity.php line 76 calls Wikibase\Repo\Specials\SpecialSetSiteLink->prepareArguments() SpecialPage.php line 384 calls Wikibase\Repo\Specials\SpecialModifyEntity->execute() SpecialPageFactory.php line 553 calls SpecialPage->run() MediaWiki.php line 249 calls SpecialPageFactory::executePath() MediaWiki.php line 683 calls MediaWiki->performRequest() MediaWiki.php line 474 calls MediaWiki->main() index.php line 41 calls MediaWiki->run() index.php line 3 calls include()
Expectation (masterConns <= 0) by MediaWiki::main not met: [connect to 10.64.16.144 (wikidatawiki)] TransactionProfiler.php line 311 calls wfBacktrace() TransactionProfiler.php line 146 calls TransactionProfiler->reportExpectationViolated() LoadBalancer.php line 576 calls TransactionProfiler->recordConnection() DBAccessBase.php line 61 calls LoadBalancer->getConnection() WikiPageEntityMetaDataLookup.php line 160 calls DBAccessBase->getConnection() WikiPageEntityMetaDataLookup.php line 69 calls Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup->selectRevisionInformationMultiple() PrefetchingWikiPageEntityMetaDataAccessor.php line 193 calls Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup->loadRevisionInformation() PrefetchingWikiPageEntityMetaDataAccessor.php line 162 calls Wikibase\Lib\Store\Sql\PrefetchingWikiPageEntityMetaDataAccessor->doFetch() WikiPageEntityRevisionLookup.php line 81 calls Wikibase\Lib\Store\Sql\PrefetchingWikiPageEntityMetaDataAccessor->loadRevisionInformation() CachingEntityRevisionLookup.php line 149 calls Wikibase\Lib\Store\WikiPageEntityRevisionLookup->getEntityRevision() CachingEntityRevisionLookup.php line 132 calls Wikibase\Lib\Store\CachingEntityRevisionLookup->fetchEntityRevision() CachingEntityRevisionLookup.php line 149 calls Wikibase\Lib\Store\CachingEntityRevisionLookup->getEntityRevision() CachingEntityRevisionLookup.php line 132 calls Wikibase\Lib\Store\CachingEntityRevisionLookup->fetchEntityRevision() RevisionBasedEntityLookup.php line 44 calls Wikibase\Lib\Store\CachingEntityRevisionLookup->getEntityRevision() RedirectResolvingEntityLookup.php line 51 calls Wikibase\Lib\Store\RevisionBasedEntityLookup->getEntity() EntityRetrievingTermLookup.php line 131 calls Wikibase\DataModel\Services\Lookup\RedirectResolvingEntityLookup->getEntity() EntityRetrievingTermLookup.php line 116 calls Wikibase\DataModel\Services\Lookup\EntityRetrievingTermLookup->fetchFingerprint() EntityRetrievingTermLookup.php line 64 calls Wikibase\DataModel\Services\Lookup\EntityRetrievingTermLookup->getFingerprint() UsageTrackingTermLookup.php line 64 calls Wikibase\DataModel\Services\Lookup\EntityRetrievingTermLookup->getLabels() LanguageFallbackLabelDescriptionLookup.php line 55 calls Wikibase\Client\Usage\UsageTrackingTermLookup->getLabels() WikibaseLuaBindings.php line 138 calls Wikibase\Lib\Store\LanguageFallbackLabelDescriptionLookup->getLabel() Scribunto_LuaWikibaseLibrary.php line 364 calls Wikibase\Client\DataAccess\Scribunto\WikibaseLuaBindings->getLabel() Engine.php line 407 calls Wikibase\Client\DataAccess\Scribunto\Scribunto_LuaWikibaseLibrary->getLabel() - line - calls Scribunto_LuaSandboxCallback->__call() Engine.php line 319 calls LuaSandboxFunction->call() LuaCommon.php line 243 calls Scribunto_LuaSandboxInterpreter->callFunction() LuaCommon.php line 887 calls Scribunto_LuaEngine->executeModule() Hooks.php line 121 calls Scribunto_LuaModule->invoke() Parser.php line 3347 calls ScribuntoHooks::invokeHook() Parser.php line 3082 calls Parser->callParserFunction() Preprocessor_Hash.php line 1075 calls Parser->braceSubstitution() Parser.php line 3224 calls PPFrame_Hash->expand() Preprocessor_Hash.php line 1075 calls Parser->braceSubstitution() Parser.php line 2896 calls PPFrame_Hash->expand() Parser.php line 1259 calls Parser->replaceVariables() Parser.php line 439 calls Parser->internalParse() WikitextContent.php line 331 calls Parser->parse() AbstractContent.php line 497 calls WikitextContent->fillParserOutput() PoolWorkArticleView.php line 140 calls AbstractContent->getParserOutput() PoolCounterWork.php line 123 calls PoolWorkArticleView->doWork() Article.php line 666 calls PoolCounterWork->execute() ViewAction.php line 44 calls Article->view() MediaWiki.php line 504 calls ViewAction->show() MediaWiki.php line 288 calls MediaWiki->performAction() MediaWiki.php line 746 calls MediaWiki->performRequest() MediaWiki.php line 520 calls MediaWiki->main() index.php line 43 calls MediaWiki->run() index.php line 3 calls include()
Entries in kibana are found via <<+channel:DBPerformance +message:*WikiPageEntityMetaDataLookup*>>