Yes - you understood correctly. Sorry, I was not that precise.

I already stumbled upon HSEARCH-2861 Open some days ago because I was looking for a "hot update" solution with HSearch and ES.

My Idea was to copy the current index and redirect the queries to the copied one while I make a full rebuild with the MassIndexer to the original index.

I would only do that when I know, that the code base and HSearch/Index configuration were not changed. I need to rebuild my index from time to time because unfortunately there is sometimes data inserted in my database without using the Hibernate ORM layer.

Altering the path in the search request would me allow to do this trick without the need of a fully automated deeper integration in HSearch.