logging stacktrace

git-svn-id: http://vosao.googlecode.com/svn/trunk@1173 d7b8a73a-866d-11de-bed6-6d316fbe0868
refactoring exception throwing in index management

git-svn-id: http://vosao.googlecode.com/svn/trunk@1174 d7b8a73a-866d-11de-bed6-6d316fbe0868
refactoring exception throwing in index management

git-svn-id: http://vosao.googlecode.com/svn/trunk@1175 d7b8a73a-866d-11de-bed6-6d316fbe0868
refactoring exception throwing in index management

git-svn-id: http://vosao.googlecode.com/svn/trunk@1176 d7b8a73a-866d-11de-bed6-6d316fbe0868
refactoring exception throwing in index management

git-svn-id: http://vosao.googlecode.com/svn/trunk@1177 d7b8a73a-866d-11de-bed6-6d316fbe0868
refactoring exception throwing in index management

git-svn-id: http://vosao.googlecode.com/svn/trunk@1178 d7b8a73a-866d-11de-bed6-6d316fbe0868
refactoring exception throwing in index management

git-svn-id: http://vosao.googlecode.com/svn/trunk@1179 d7b8a73a-866d-11de-bed6-6d316fbe0868