Fatal error: Uncaught MongoDB\Driver\Exception\ConnectionTimeoutException: No suitable servers found (`serverSelectionTryOnce` set): [connection refused calling hello on 'mongo1:27017'] in /mnt/www/myframe/vendor/mongodb/mongodb/src/functions.php:520 Stack trace: #0 /mnt/www/myframe/vendor/mongodb/mongodb/src/functions.php(520): MongoDB\Driver\Manager->selectServer(Object(MongoDB\Driver\ReadPreference)) #1 /mnt/www/myframe/vendor/mongodb/mongodb/src/Collection.php(654): MongoDB\select_server(Object(MongoDB\Driver\Manager), Array) #2 /mnt/www/myframe/main_loader.php(141): MongoDB\Collection->find() #3 /mnt/www/myframe/index.php(10): include_once('/mnt/www/myfram...') #4 {main} thrown in /mnt/www/myframe/vendor/mongodb/mongodb/src/functions.php on line 520