Flink这是什么原因啊，我用root用户也不行？[ERROR] Could not execute

Flink这是什么原因啊，我用root用户也不行？[ERROR] Could not execute SQL statement. Reason: java.net.ConnectException: Connection refused (Connection refused)Flink SQL> CREATE TABLE mysql_binlog (

id INT NOT NULL, name STRING, description STRING, weight DECIMAL(10,3), PRIMARY KEY(id) NOT ENFORCED ) WITH ( 'connector' = 'mysql-cdc', 'hostname' = 'localhost', 'port' = '3306', 'username' = 'root', 'password' = '123456', 'database-name' = 'flink', 'table-name' = 'orders' ); [INFO] Execute statement succeed.

Flink SQL> SELECT id, UPPER(name), description, weight FROM mysql_binlog;

[ERROR] Could not execute SQL statement. Reason: java.net.ConnectException: Connection refused (Connection refused)