"Could not resolve a persistence unit" error...

Question

Hello,
I created a Netbeans Visual Web application. I added an Entity Class from a database table. A resource is added into Server Resources part. when I look at its properties, I see that it's JNDI name is set to "bitkiwiki" and I check the Sun Application Server's JDBC Resources and I see "bitkiwiki" in JDBC Resources.
My controller class has a EntityManagerFactory element:
    @PersistenceUnit(unitName = "bitkiwiki")
    private EntityManagerFactory emf;When I compile the project it compiles successfully but when I deploy it, I get an error like this:
Deploying application in domain failed; Deployment Error -- Could not resolve a persistence unit corresponding to the persistence-unit-ref-name .......
The Persistance UnitName exists in the server resources but it still complains about it.
What's the problem you think?
Thanks.

Answer 1

In the persistence.xml you have something like this:
<persistence-unit name="EJBCustomerPU" transaction-type="JTA">
<jta-data-source>cust</jta-data-source>
<properties>
</properties>
</persistence-unit>
The unitName in the annotation should equal "EJBCustomerPU". I think the "bitkiwiki" is wrong. The "cust" in the above persistence.xml should be the resource you mention in the jdbc section of the app server admin.