yum's error message

[Oybek Nuriddinov]

Hi everybody.
There is message in my yum , what does it mean:


Mirrordetection : default
Yum Version : 2.6.0 (/usr/share/yum-cli)
Loading "installonlyn" plugin
Cannot find a valid baseurl for repo: rpmforge
Cannot find a valid baseurl for repo: rpmforge
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