-deployment

   -${JBOSS_HOME}/conf/bootstrap/profile.xml

  -${JBOSS_HOME}/conf/bootstrap/vfs.xml

  -${JBOSS_HOME}/conf/bootstrap/deployer.xml

-migrate EJB3

-annotation

     a), remove the mappedName annotation

     b), remote interfance class name can not be same as local interface class name

  -persistence unit

     a), the same persistent name can't put into 2 or more jar files, despite the the 2 persistent config having the exact same config data.

-migrate EJB2

  -stateful session bean removal

    a)can't remove SFSB insize a transaction, (ejbObject.remove() or localEjbObject.remove() can't be called insize a transaction)

  -sequence of ejb2 deployment descriptor

-migrate web service

  -ejb3 annotation endpoint to web application endpoint

    a)add web.xml and jboss-web.xml

    b)remove the annotation SecurityDomain, ContextRoot, webURI of the EJB3 class

-migrate jboss cache

   -use old jboss-cahce.jar and jboss-jgroups.jar

-migrate jboss messaging

   -database schema change

    a)add two tables

-issues & solution

  -how to retrieve the metadata in nest jar by vfs interface

   -How to ignore the none exist deployment unit

   -java.lang.LinkageError: loader constraint violation for class javax.sql.DataSource

  - SFSB removal in jboss 5.1

   -JSP compile error

   -classLoader.getResource() not work

   -how to get the jboss version

   -

references: https://community.jboss.org/people/bondchan921?view=discussions