title: EJB MDB migration from 2.1 to version suitable for JavaEE6
body: <p>I need bit of the help before i start analyzing the migration of EJB 2.1.
  we are using ejb2.1 version. Which is the appropriate ejb version for javaEE6?
  what impact will happen on spring from ejb migration? as we are using spring dependency injection for integrating with Message driven beans.
  Any good migration guide from ejb2.1?</p>
  
  <p>Thanks in advance.</p>