Thanks, Michael:
I make a simple API that when I want to make the updated index to be
functional, re-assign the Singleton instance of Searcher to be null,
and that seems to work.
I'll check the SearcherManager for further optimization.
Thanks for your trouble to review this problem and it really
An IndexSearcher only searches the point-in-time view of your index as
of when it was opened.
So any changes to the index (newly indexed documents, or deleted
documents) will not be reflected until you refresh the underlying
IndexReader, to see the next point-in-time view.
The refresh is efficien
