这个是什么错误？如何处理？

各位大虾，我的论坛最近无法备份完数据库，每次到大约90％的时候，就出现如下提示，请帮助看一下，该如何处理，谢谢！

ERROR
The requested URL could not be retrieved

--------------------------------------------------------------------------------

While trying to retrieve the URL: http://www.dv818.com/admincp.php?

The following error was encountered:

Zero Sized Reply
Squid did not receive any data for this request.

Your cache administrator is webmaster@bigwww.com.

这里是建议区,老兄

我多次发贴，没有人解答，才来这里，抱歉！