yum升级！！！！

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yum上交的源时出现了和我挂载光盘升级时同样的错误
下面是我yum上交的源时出现的响应，和挂光盘是的错误是一样的！！！！
[     ]# yum install httpd
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for httpd to pack into transaction set.
media://1161131669.029329%232/Fedora/RPMS/httpd-2.2.3-5.i386.rpm: [Errno 4] IOError: <urlopen error unknown url type: media>
Trying other mirror.
Error: failed to retrieve Fedora/RPMS/httpd-2.2.3-5.i386.rpm from ftp.sjtu.edu.cn
error was [Errno 4] IOError: <urlopen error unknown url type: media>

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谁帮俺看看怎么回事啊！！！！！
先谢谢了