Some eclipse users may get this error frequently.Here is a simple solution for it.
Solution:
On your eclipse go to
Windows->Preferences->Team->Svn
Check the status of the SVN interface. That can be JavaHL or SVNKit(Pure Java).Both might not be compatible with your eclipse version.That could be the issue
Follow the below steps and enjoy coding
1) Goto Help menu on your eclipse
Help->Install New Software->What is already installed?
Uninstall current subeclipse and everything related to that
eclipse will get restarted after uninstall
2) On eclipse restart go to Install New Software screen again
use the following link to install subeclipse 1.6
http://subclipse.tigris.org/update_1.6.x
install subeclipse. after installation eclipse will get restarted
3) If issue still exists, update your subeclipse with version 1.8.Below link can be used to upgrade your subeclipse
http://subclipse.tigris.org/update_1.8.x
4) Finally change the svn client to SvnKit.
Go to Windows->Preferences->Team->Svn
Change client to SvnKit(Pure Java)
Hope this helps..!
TechNotes 