MySQL server error report:Array
(
    [0] => Array
        (
            [message] => MySQL Query Error
        )

    [1] => Array
        (
            [sql] => SELECT cus_no FROM `OK_ELEC`.`ok_chat_third_customer` WHERE is_master = 1 AND cus_type = 0 AND supplier_id = 0
        )

    [2] => Array
        (
            [error] => MySQL server has gone away
        )

    [3] => Array
        (
            [errno] => 2006
        )

)