Adding the WFK Mareks :-) The only potential problem that I see is backward incompatibility with WFK 2.0.0 and its supported frameworks through June 2015. We do not require JVM upgrades, in production, for customers, within the "supported time window" - in our WFK case June 2012 to June 2015. On Mar 20, 2014, at 11:21 AM, Sanne Grinovero <sanne(a)hibernate.org&gt; wrote: > The next minor release of Apache Lucene v. 4.8 will require Java7. > > The Lucene team has highlighted many good reasons for that, including > some excellent improvements in sorting performance and reliability of > IO operations: nice things we'd like to take advantage of. > > Objections against baseling Hibernate Search 5 to *require* Java7 too? > We hardly have a choice, so objections better be good ;-) > > -- Sanne