SVN error on Eclipse: org.tigris.subversion.javahl.ClientException: Attempted to lock an already-locked dir

Problem
As I commit my source code to SVN in eclipse, but Eclipse shut down unexpectedly. After I launch Eclipse again, and try to commit again, it show this error message:

 org.apache.subversion.javahl.ClientException: Attempted to lock an already-locked dir  
 svn: Commit failed (details follow):  
 svn: Working copy 'D:\workspace\fms\fms-webapp\src\main\java\gov\nta\fms\web\controller' locked.  
 svn: 'D:\workspace\fms\fms-webapp\src\main\java\gov\nta\fms\web\controller' is already locked. 

Solution
Right click on the offending project, click Team and then select Refresh/Cleanup. SVN gets the offending .lock files and deletes them. 

cleanup D:/workspace/fms/fms-webapp/src/main/java  

After Refresh/Cleanup, I can commit source code successfully

commit -m "add 4 spaces for rptInfo parameter" D:/workspace/fms/fms-webapp/src/main/java/gov/nta/fms/web/controller/Fms406rReportController.java  
   Sending    D:/workspace/fms/fms-webapp/src/main/java/gov/nta/fms/web/controller/Fms406rReportController.java  
   Transmitting file data ...  
   Committed revision 1264.  

Reference

[1] http://sherk.wordpress.com/2008/09/15/svn-error-on-eclipse-orgtigrissubversionjavahlclientexception-attempted-to-lock-an-already-locked-dir/