anonymous wrote : | Hibernate 3.2.6.ga | Hibernate Annotations 3.3.0.ga | Spring Framework 2.0.5 anonymous wrote : Coincidentally, it works with Hibernate 3.2.0.ga and Annotations 3.2.0.ga. The exception stacktrace that you posted does not show anything related to hibernate. But going by what you are explaining, about the issue, i guess you will have to package hibernate-search.jar (the version is 3.0.0.GA or 3.0.1GA) and lucene-core-2.2.0.jar (along with the hibernate-annotations 3.3.0 GA and the hibernate jar 3.2.6GA) in your application. See the hibernate version compatibilty matrix for these jars at http://www.hibernate.org/6.html See this thread for more details http://www.jboss.com/index.html?module=bb&op=viewtopic&t=120419&a.... The first page of the thread is probably not much of interest, the second and third page talk about similar issue as this. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4142275#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...