SQLSTATE[HY000] [2003] Can't connect to MySQL server on '172.31.13.136' (113)

#0 /sites/qa2.bglobale.de/htdocs/lib/Zend/Db/Adapter/Pdo/Mysql.php(111): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /sites/qa2.bglobale.de/htdocs/lib/Varien/Db/Adapter/Pdo/Mysql.php(396): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /sites/qa2.bglobale.de/htdocs/lib/Zend/Db/Adapter/Abstract.php(460): Varien_Db_Adapter_Pdo_Mysql->_connect()
#3 /sites/qa2.bglobale.de/htdocs/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array)
#4 /sites/qa2.bglobale.de/htdocs/lib/Varien/Db/Adapter/Pdo/Mysql.php(504): Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8', Array)
#5 /sites/qa2.bglobale.de/htdocs/app/code/core/Mage/Core/Model/Resource.php(179): Varien_Db_Adapter_Pdo_Mysql->query('SET NAMES utf8')
#6 /sites/qa2.bglobale.de/htdocs/app/code/core/Mage/Core/Model/Resource.php(110): Mage_Core_Model_Resource->_newConnection('pdo_mysql', Object(Mage_Core_Model_Config_Element))
#7 /sites/qa2.bglobale.de/htdocs/app/code/community/Globale/EFPC/Trait/AddCustomerInfoToPageId.php(48): Mage_Core_Model_Resource->getConnection('core_read')
#8 /sites/qa2.bglobale.de/htdocs/app/code/community/Globale/EFPC/Trait/AddCustomerInfoToPageId.php(22): Globale_EFPC_Model_Rewrite_Processor_Category->_initConfig()
#9 /sites/qa2.bglobale.de/htdocs/app/code/community/Globale/EFPC/Trait/AddCustomerInfoToPageId.php(17): Globale_EFPC_Model_Rewrite_Processor_Category->_appendCustomerInfoToPageId('qa2.bglobale.de...')
#10 /sites/qa2.bglobale.de/htdocs/app/code/core/Enterprise/PageCache/Model/Processor.php(332): Globale_EFPC_Model_Rewrite_Processor_Category->getPageIdWithoutApp(Object(Enterprise_PageCache_Model_Processor))
#11 /sites/qa2.bglobale.de/htdocs/app/code/core/Mage/Core/Model/Cache.php(687): Enterprise_PageCache_Model_Processor->extractContent(false)
#12 /sites/qa2.bglobale.de/htdocs/app/code/core/Mage/Core/Model/App.php(351): Mage_Core_Model_Cache->processRequest()
#13 /sites/qa2.bglobale.de/htdocs/app/Mage.php(692): Mage_Core_Model_App->run(Array)
#14 /sites/qa2.bglobale.de/htdocs/index.php(83): Mage::run('', 'store')
#15 {main}