Now I have tried the old school approach: | Context context = new InitialContext(); | DataSource ds = (DataSource) context.lookup("java:OracleDS"); | It works. After fighting some hours with JBoss it really works. But something must be wrong with my first dependency injection attempt. The following annotations are all invalid and create null-values: | @Resource(name="jdbc/OracleDS", mappedName="java:OracleDS") | private DataSource ds1; | | @Resource(name="java:OracleDS") | private DataSource ds2; | | @Resource(name="java/OracleDS") | private DataSource ds3; | | @Resource(name="jdbc:OracleDS") | private DataSource ds4; | | @Resource(name="jdbc/OracleDS") | private DataSource ds5; | Does anybody know what's wrong with the Resource-annotations? Do they work only within EJBs and not in servlets? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4253282#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...