Some problems emerge after update fedora software. it says 'MESSAGE [SCR] Found components with duplicated names!' I simply cant resolv the bug. so decided to remove and reinstall all the packages. here is its steps:

1. su;

2. yum remove 'eclipse*'. this removes eclipse and pydev;

3. yum install eclipse;

4. when type 'eclipse' in the console, it will show up some error message 'error see .metadata/.log', when looking into .log file, it says components with duplicated names! that quite difficult to solve ( i've googled a lot, but haven't got a clue'. then I cope /home/wgzhang/.eclipse to ~/.eclipse_backup, then delete .eclipse subdirectory. start eclipse again, it startup normally, but all its configuration and plugins lost.

5. from eclipse->help->install new software->reinstall pydev accoding to the following webpage

6. it is found the following site quite instructive http://fedoraproject.org/wiki/Eclipse and http://pydev.org/manual_101_install.html

7. import project from the project directory which is supposed to be quite simple.