In Seam's hibernate-all.jar, org/hibernate/cache/EhCacheProvider.class has references to various classes in net.sf.ehcache, but it's not part of that JAR file. When I look at the latest (6/6/06) version of the source for org.hibernate.cfg.SettingsFactory, I see that the textual reference to EhCacheProvider passed have been removed. Is it a correct inference that the current release of Seam is missing ehcache? I found this because I was trying to write a unit test (using TestNG from Eclipse) and got a NoClassDefFoundError emanating from SettingsFactory.createCacheProvider() called via javax.persistence.createEntityManagerFactory(). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3958981#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...