==== Error ====
* [[ URL | Logtash single document ]]
```name=message
[192b4fdf-fcb4-4739-b305-286ca8a11999] 2022-09-29 08:19:58: Fatal exception of type "Wikimedia\Rdbms\DBQueryError"
[7f94c7de-6388-492c-9ae9-7d3276d6a731] 2022-09-29 08:21:59: Fatal exception of type "Wikimedia\Rdbms\DBQueryError"
[ee5b9c5f-2bb5-439c-884b-7d7bf96ff774] 2022-09-29 08:29:25: Fatal exception of type "Wikimedia\Rdbms\DBQueryError"
```
```name=trace,lines=10
name=detailled message
Error 1049: Unknown database 'metawiki'
Function: Wikimedia\Rdbms\DatabaseMysqlBase::doSelectDomain
Query: USE `metawiki`
```
```name=trace,lines=10
from /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/database/Database.php(1618)
#0 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/database/Database.php(1602): Wikimedia\Rdbms\Database->getQueryException(string, integer, string, string)
#1 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/database/Database.php(1576): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#2 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/database/DatabaseMysqlBase.php(214): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string)
#3 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/database/Database.php(1869): Wikimedia\Rdbms\DatabaseMysqlBase->doSelectDomain(Wikimedia\Rdbms\DatabaseDomain)
#4 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1138): Wikimedia\Rdbms\Database->selectDomain(Wikimedia\Rdbms\DatabaseDomain)
#5 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/loadbalancer/LoadBalancer.php(970): Wikimedia\Rdbms\LoadBalancer->reuseOrOpenConnectionForNewRef(integer, Wikimedia\Rdbms\DatabaseDomain, integer)
#6 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/loadbalancer/LoadBalancer.php(2095): Wikimedia\Rdbms\LoadBalancer->getServerConnection(integer, string, integer)
#7 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/objectcache/wancache/WANObjectCache.php(1689): Wikimedia\Rdbms\LoadBalancer->Wikimedia\Rdbms\{closure}(boolean, integer, array, NULL, array)
#8 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/objectcache/wancache/WANObjectCache.php(1522): WANObjectCache->fetchOrRegenerate(string, integer, Closure, array, array)
#9 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/loadbalancer/LoadBalancer.php(2113): WANObjectCache->getWithSetCallback(string, integer, Closure, array)
#10 /srv/mediawiki/php-1.40.0-wmf.3/includes/libs/rdbms/loadbalancer/LoadBalancer.php(2016): Wikimedia\Rdbms\LoadBalancer->isPrimaryRunningReadOnly(Wikimedia\Rdbms\DatabaseDomain)
#11 /srv/mediawiki/php-1.40.0-wmf.3/includes/ReadOnlyMode.php(45): Wikimedia\Rdbms\LoadBalancer->getReadOnlyReason()
#12 /srv/mediawiki/php-1.40.0-wmf.3/includes/ReadOnlyMode.php(29): ReadOnlyMode->getReason()
#13 /srv/mediawiki/php-1.40.0-wmf.3/includes/user/UserGroupManager.php(760): ReadOnlyMode->isReadOnly()
#14 /srv/mediawiki/php-1.40.0-wmf.3/includes/user/UserRightsProxy.php(243): MediaWiki\User\UserGroupManager->addUserToGroup(UserRightsProxy, string, NULL, boolean)
#15 /srv/mediawiki/php-1.40.0-wmf.3/includes/specials/SpecialUserrights.php(433): UserRightsProxy->addGroup(string, NULL)
#16 /srv/mediawiki/php-1.40.0-wmf.3/includes/specials/SpecialUserrights.php(367): UserrightsPage->doSaveUserGroups(UserRightsProxy, array, array, string, array, array)
#17 /srv/mediawiki/php-1.40.0-wmf.3/includes/specials/SpecialUserrights.php(238): UserrightsPage->saveUserGroups(string, string, UserRightsProxy)
#18 /srv/mediawiki/php-1.40.0-wmf.3/includes/specialpage/SpecialPage.php(701): UserrightsPage->execute(NULL)
#19 /srv/mediawiki/php-1.40.0-wmf.3/includes/specialpage/SpecialPageFactory.php(1428): SpecialPage->run(NULL)
#20 /srv/mediawiki/php-1.40.0-wmf.3/includes/MediaWiki.php(316): MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, RequestContext)
#21 /srv/mediawiki/php-1.40.0-wmf.3/includes/MediaWiki.php(904): MediaWiki->performRequest()
#22 /srv/mediawiki/php-1.40.0-wmf.3/includes/MediaWiki.php(562): MediaWiki->main()
#23 /srv/mediawiki/php-1.40.0-wmf.3/index.php(50): MediaWiki->run()
#24 /srv/mediawiki/php-1.40.0-wmf.3/index.php(46): wfIndexMain()
#25 /srv/mediawiki/w/index.php(3): require(string)
#26 {main}
```
==== Impact ====
* Cannot add `CheckUser` and remove `bureaucrat`. I can edit `confirmed` status just fine.
==== Notes ====