Help how to look up ejb3 deployed in ear using jndi

Hi,everyone:
I'm trying to use jndi to look up ejb3 depoyed in ear-file. The structure of ear file is like: taas.ear\app.jar , the "app.jar" is where the ejbs are deployed.
If i write code:
jndiContext.lookup("ServiceProviderDaoImpl/local");There will be exception:
javax.naming.NameNotFoundException: ServiceProviderDaoImpl not boundHowever, if i deploy the ejbs directly in a app.jar which is not in a ear-file, then same same code will work fine.
I cannot figure out how to write the correct code to look up the ejbs.
I use jboss 5.0.1GA.
Could anyone help me? Thanks a lot.

Usually the lookup name is:
earname/ServiceProviderDao/local
Replace "earname" with the name of your ear of course, without the '.ear' extension.
Use the JBoss JMX console and then the jndiView service to see under what names your EJBs are bound (under "global namespace" I think the label was).

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