MySQL info: Can not connect to MySQL server: 2003 : Can't connect to MySQL server on 'rm-rj958m276az32xw8r.mysql.rds.aliyuncs.com' (104)

Time: 2021-01-28 00:58:49
Script: /act.php
SQL:
Error:
Errno: 0

Array
(
    [0] => Array
        (
            [file] => /var/www/html/panda-cart/public/db_driver/mysql.driver.php
            [line] => 6
            [function] => disposal
            [class] => database_driver
            [object] => mysql_driver Object
                (
                    [db_driver] => MySQL
                    [query_count] => 0
                    [debug] => 0
                    [debug_info] => 
                    [debug_time] => 
                    [db_name] => 
                    [query_id] => 
                    [link_id] => 
                    [cache_dir] => 
                    [field_array] => Array
                        (
                        )

                    [sign] => 
                    [sql_array] => Array
                        (
                        )

                )

            [type] => ->
            [args] => Array
                (
                    [0] => Can not connect to MySQL server: 2003 : Can't connect to MySQL server on 'rm-rj958m276az32xw8r.mysql.rds.aliyuncs.com' (104)
                )

        )

    [1] => Array
        (
            [file] => /var/www/html/panda-cart/conf/system.inc.php
            [line] => 39
            [function] => connect
            [class] => mysql_driver
            [object] => mysql_driver Object
                (
                    [db_driver] => MySQL
                    [query_count] => 0
                    [debug] => 0
                    [debug_info] => 
                    [debug_time] => 
                    [db_name] => 
                    [query_id] => 
                    [link_id] => 
                    [cache_dir] => 
                    [field_array] => Array
                        (
                        )

                    [sign] => 
                    [sql_array] => Array
                        (
                        )

                )

            [type] => ->
            [args] => Array
                (
                    [0] => rm-rj958m276az32xw8r.mysql.rds.aliyuncs.com
                    [1] => root
                    [2] => 86daigou@2020
                    [3] => xmaolife
                    [4] => utf8
                )

        )

    [2] => Array
        (
            [file] => /var/www/html/panda-cart/conf/global.php
            [line] => 41
            [args] => Array
                (
                    [0] => /var/www/html/panda-cart/conf/system.inc.php
                )

            [function] => require_once
        )

    [3] => Array
        (
            [file] => /var/www/html/panda-cart/act.php
            [line] => 174
            [args] => Array
                (
                    [0] => /var/www/html/panda-cart/conf/global.php
                )

            [function] => require_once
        )

)