I use hibernate search and auto indexing function. The auto indexing and updating function are fine. but when I use hql to delete an entry in table product(delete from product where id = 4), hibernate search doesn't delete index automatically. So let's say I have 8 entries in product table, after delete one, I still get total 8 entries when i use hibernate search to search. Anybody has any idea on this?

Do I need to do some special thing like adding some annotations?

Thanks in advance.

First you should rarely use bulk queries like that.
For example your query can efficiently be replaced by
em.remove ( em.getReference(Product.class, 4) );

But if you have to use a bulk query, then Hibernate Search does not know about the change and you have to "tell it" by using the FullTextEntityManager#index / #purge etc

But again, bulk operations are useful if you really massive bulk changes to your data.

Thanks for your reply. It's helpful.