1. Add Document Library porlet
1.1 Add files and folders in document library
2. Add Search Porlet
3. Search using Search Porlet. It found files
4. Clic in a file from result list.
5. Show Document Library portlet but at root.
B. Fix: (I believe that is not correct)
Edit liferay-portlet.xml, and change "instanceable" value to "false" for "110" portlet (Document Library)
Repeat steps (A) and shows the file selected.
Bug (and fix) affects to friendly-url for Document Library, like "/c/document_library/find_file_entry?filedEntryId=NNNN"