Fatal error: Uncaught CredisException: Connection to Redis redis3:6379 failed after 2 failures.Last Error : (111) Connection refused in /var/www/magento2/htdocs/vendor/colinmollenhour/credis/Client.php:493 Stack trace: #0 /var/www/magento2/htdocs/vendor/colinmollenhour/credis/Client.php(489): Credis_Client->connect() #1 /var/www/magento2/htdocs/vendor/colinmollenhour/credis/Client.php(811): Credis_Client->connect() #2 /var/www/magento2/htdocs/vendor/colinmollenhour/credis/Client.php(655): Credis_Client->__call('select', Array) #3 /var/www/magento2/htdocs/vendor/colinmollenhour/cache-backend-redis/Cm/Cache/Backend/Redis.php(415): Credis_Client->select(77) #4 /var/www/magento2/htdocs/vendor/colinmollenhour/cache-backend-redis/Cm/Cache/Backend/Redis.php(250): Cm_Cache_Backend_Redis->_applyClientOptions(Object(Credis_Client)) #5 /var/www/magento2/htdocs/vendor/magento/framework/Cache/Backend/Redis.php(34): Cm_Cache_Backend_Redis->__construct(Array) #6 /var/www/magento2/htdocs/vendor/magento/zendframework1/library/Zend/Cache.p in /var/www/magento2/htdocs/vendor/colinmollenhour/credis/Client.php on line 493