问centos经常卡死怎么回事

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class Main {
    public static void main(String[] args) {
        try {
            // 加载驱动
            Class.forName("com.mysql.cj.jdbc.Driver");

            // 连接数据库
            String url = "jdbc:mysql://localhost:3306/your_database_name?useSSL=false&serverTimezone=UTC";
            String username = "your_username";
            String password = "your_password";
            Connection connection = DriverManager.getConnection(url, username, password);

            System.out.println("Connected to MySQL!");

            // 关闭连接
            connection.close();
        } catch (ClassNotFoundException e) {
            System.out.println("找不到驱动类");
            e.printStackTrace();
        } catch (SQLException e) {
            System.out.println("连接数据库失败");
            e.printStackTrace();
        }
    }
}