I really don\'t know what\'s going on with Eclipse 3.5 (3.5.0 or 3.5.1, same issues), but it\'s been now 2 days that I\'m struggling with Eclipse to find a way to make the p
In my eclipse Luna faced the same issue because of this URL https://sourceforge.net/projects/restfulplugin/files/site/
So i just Disabled the URL that was Shown in the Error From the Available Software Sites.
You may Check the URL or Try with the Updated URL reg to that Exception :)