<?xml version="1.0"?>
<api>
  <error code="internal_api_error_DBConnectionError" info="Exception Caught: DB connection error: Can&#039;t connect to local MySQL server through socket &#039;/run/mysql-default/mysqld.sock&#039; (111) (localhost:/run/mysql-default/mysqld.sock)" xml:space="preserve">

#0 /var/www/mediawiki/includes/db/LoadBalancer.php(771): DatabaseBase->reportConnectionError('Unknown error (...')
#1 /var/www/mediawiki/includes/db/LoadBalancer.php(494): LoadBalancer->reportConnectionError()
#2 /var/www/mediawiki/includes/GlobalFunctions.php(3632): LoadBalancer->getConnection(-1, Array, false)
#3 /var/www/mediawiki/includes/ChangeTags.php(313): wfGetDB(-1)
#4 /var/www/mediawiki/includes/api/ApiFeedContributions.php(184): ChangeTags::listDefinedTags()
#5 /var/www/mediawiki/includes/api/ApiBase.php(364): ApiFeedContributions->getAllowedParams(0)
#6 /var/www/mediawiki/includes/api/ApiBase.php(435): ApiBase->getFinalParams()
#7 /var/www/mediawiki/includes/api/ApiMain.php(766): ApiBase->extractRequestParams()
#8 /var/www/mediawiki/includes/api/ApiMain.php(915): ApiMain->setupModule()
#9 /var/www/mediawiki/includes/api/ApiMain.php(364): ApiMain->executeAction()
#10 /var/www/mediawiki/includes/api/ApiMain.php(335): ApiMain->executeActionWithErrorHandling()
#11 /var/www/mediawiki/api.php(85): ApiMain->execute()
#12 {main}

</error>
</api>