<?xml version="1.0"?>
<api>
  <error code="internal_api_error_DBConnectionError" info="Exception Caught: DB connection error: Resource temporarily unavailable (localhost)" xml:space="preserve">

#0 /var/www/html/wiki/includes/db/LoadBalancer.php(763): DatabaseBase->reportConnectionError('Unknown error (...')
#1 /var/www/html/wiki/includes/db/LoadBalancer.php(496): LoadBalancer->reportConnectionError()
#2 /var/www/html/wiki/includes/GlobalFunctions.php(3491): LoadBalancer->getConnection(-1, Array, false)
#3 /var/www/html/wiki/includes/ChangeTags.php(270): wfGetDB(-1)
#4 /var/www/html/wiki/includes/api/ApiFeedContributions.php(171): ChangeTags::listDefinedTags()
#5 /var/www/html/wiki/includes/api/ApiBase.php(556): ApiFeedContributions->getAllowedParams(0)
#6 /var/www/html/wiki/includes/api/ApiBase.php(652): ApiBase->getFinalParams()
#7 /var/www/html/wiki/includes/api/ApiMain.php(710): ApiBase->extractRequestParams()
#8 /var/www/html/wiki/includes/api/ApiMain.php(814): ApiMain->setupModule()
#9 /var/www/html/wiki/includes/api/ApiMain.php(380): ApiMain->executeAction()
#10 /var/www/html/wiki/includes/api/ApiMain.php(351): ApiMain->executeActionWithErrorHandling()
#11 /var/www/html/wiki/api.php(73): ApiMain->execute()
#12 {main}

</error>
</api>