在cancelOrder中执行OrderDAO.cancelOrder时后台已抛异常，但却仍然执行了OrderDAO.cleanOrder 且数据没有回滚，不知道什么原因

具体请看代码：

public static boolean cancelOrder(final Dao dao, final String orderId)
{
try
{
Trans.exec(new Atom()
{
public void run()
{

           OrderVO orderVO = dao.fetch(OrderVO.class, orderId);
           if (orderVO != null)
           {
              orderVO.setOrderState(CommonConstants.ORDER.ORDER_STATE_CANCEL);
              dao.update(orderVO);

              //将订单数据移入历史表
              OrderDAO.cancelOrder(dao, orderId);
              OrderDAO.cancelSubOrder(dao, orderId);

              //删除在途订单信息
              OrderDAO.cleanOrder(dao, orderId);
           }

        }
     });
     return true;
  }
  catch (Exception e)
  {
     e.printStackTrace();
     log.error(e);
  }
  return false;

}

```
/**
    * 作废订单
    * 
    * @param dao
    * @param orderId
    * @return
    */
   public static boolean cancelOrder(Dao dao, String orderId)
   {
      try
      {
         Sql sql = Sqls.create("insert into cd_order_his select * ,now() from cd_order where orderId = @orderId");
         sql.params().set("orderId", orderId);
         dao.execute(sql);
         return true;
      }
      catch (Exception e)
      {
         e.printStackTrace();
         log.error(e);
      }
      return false;
   }
``````
/**
    * 删除订单数据
    * 
    * @param dao
    * @param userVO
    * @return
    */
   public static boolean cleanOrder(Dao dao, String orderId)
   {
      try
      {
         Sql sql = Sqls.create("delete from cd_order where orderId = @orderId");
         sql.params().set("orderId", orderId);
         dao.execute(sql);

         sql = Sqls.create("delete from cd_order_goods where orderId = @orderId");
         sql.params().set("orderId", orderId);
         dao.execute(sql);

         return true;
      }
      catch (Exception e)
      {
         e.printStackTrace();
         log.error(e);
      }
      return false;
   }