Unable to open PDO connection [wrapped: SQLSTATE[HY000] [2002] Connection refused]

#0 /mnt/common/propel/runtime/lib/Propel.php(574): Propel::initConnection()
#1 /mnt/common/propel/runtime/lib/Propel.php(600): Propel::getMasterConnection()
#2 /mnt/common/propel/runtime/lib/Propel.php(550): Propel::getSlaveConnection()
#3 /mnt/common/propel/runtime/lib/query/ModelCriteria.php(1217): Propel::getConnection()
#4 /mnt/common/propel/runtime/lib/query/ModelCriteria.php(1105): ModelCriteria->getSelectStatement()
#5 /mnt/models/feedlistingdata.class.php(103): ModelCriteria->find()
#6 /mnt/controllers/pages/yunkpagecontroller.class.php(237): FeedListingData->getListByFeed()
#7 /mnt/controllers/core/core.class.php(395): YunkPageController->run()
#8 /mnt/controllers/core/core.class.php(579): Yunk::pageController()
#9 /mnt/html/zyndio.php(7): Yunk::run()
#10 {main}