We have decided to do a second release candidate for Hibernate Search 4.1. We fixed a couple of issues related to clustering and how it works in a modular environment like JBoss AS 7. In particular, we made sure it works fine for JBoss AS 7.1.
But we could not resist adding a couple more bug fixes and improvements. We now use the new Lucene primitive UPDATE which should give you an interesting performance boost in write heavy environments. To the feature to kick in, you must not share the same index for several entity types. Apart from that, this will be enabled by default. Upgrade and enjoy the show.
Try it out, the final version should come soon now: