Uncaught exception: PDOException

SQLSTATE[08004] [1040] Too many connections

in /usr/src/app/src/system/db/Connection.php:41

#0 /usr/src/app/src/system/db/Connection.php(41): PDO->__construct('mysql:host=sd-m...', 'sd', 'WA363PSlxcPZmW7...', Array)
#1 [internal function]: Nurd\ServiceDesk\system\db\Connection->__construct('sd-main-1.itsm....', 'server_schema', 'sd', 'WA363PSlxcPZmW7...', 3306)
#2 /usr/src/app/src/system/serviceLocator/Locator.php(67): ReflectionClass->newInstanceArgs(Array)
#3 /usr/src/app/src/system/serviceLocator/Locator.php(104): Nurd\ServiceDesk\system\serviceLocator\Locator::get('dbmain', Array)
#4 /usr/src/app/src/bootstrap.php(44): Nurd\ServiceDesk\system\serviceLocator\Locator::init('dbmain', 'Nurd\\ServiceDes...', Array)
#5 /usr/src/app/vendor/composer/autoload_real.php(66): require('/usr/src/app/sr...')
#6 /usr/src/app/vendor/composer/autoload_real.php(56): composerRequire0215875f9f5f159225092c739dfc4cad('6865d92e6fabed6...', '/usr/src/app/ve...')
#7 /usr/src/app/vendor/autoload.php(7): ComposerAutoloaderInit0215875f9f5f159225092c739dfc4cad::getLoader()
#8 /usr/src/app/web/c1/config.php(2): require('/usr/src/app/ve...')
#9 /usr/src/app/web/bootstrap.php(9): require_once('/usr/src/app/we...')
#10 /usr/src/app/web/bootstrap.php(439): Bootstrap::init()
#11 /usr/src/app/web/main.inc.php(36): require_once('/usr/src/app/we...')
#12 /usr/src/app/web/client.inc.php(22): require_once('/usr/src/app/we...')
#13 /usr/src/app/web/index.php(23): require('/usr/src/app/we...')
#14 {main}