Hi, guys
I solved the problems. As I use AOP Pojo cache, my Replicable items were NOT instrumented. After I instrumented them in compile time, they work fine. Please see http://www.jboss.org/file-access/default/members/jbosscache/freezone/docs/2.1.0.GA/pojo/userguide_en/html/instrumentation.html
Welcome anyone ask questions.