Fatal error: Uncaught CredisException: Connection to Redis failed after 2 failures.Last Error : (0) php_network_getaddresses: getaddrinfo failed: System error in /var/www/html/vendor/colinmollenhour/credis/Client.php:448 Stack trace: #0 /var/www/html/vendor/colinmollenhour/credis/Client.php(444): Credis_Client->connect() #1 /var/www/html/vendor/colinmollenhour/credis/Client.php(774): Credis_Client->connect() #2 /var/www/html/vendor/colinmollenhour/credis/Client.php(604): Credis_Client->__call('select', Array) #3 /var/www/html/vendor/colinmollenhour/cache-backend-redis/Cm/Cache/Backend/Redis.php(144): Credis_Client->select(1) #4 /var/www/html/vendor/magento/zendframework1/library/Zend/Cache.php(153): Cm_Cache_Backend_Redis->__construct(Array) #5 /var/www/html/vendor/magento/zendframework1/library/Zend/Cache.php(94): Zend_Cache::_makeBackend('Cm_Cache_Backen...', Array, true, true) #6 /var/www/html/vendor/magento/framework/App/Cache/Frontend/Factory.php(155): Zend_Cache::factory('Magento\\Framewo...', 'Cm_Cache_Backen...', in /var/www/html/vendor/colinmollenhour/credis/Client.php on line 448