All,
I am newbie to all these things and much as I found this error, I managed to resolve it using the following
@PersistenceContext(unitName="ABCejbPU2")
I connected to MySQL and Oracle using 2 different persistent units and all you have to do is to specify which one you are using where in your program i.e. Wherever you are using @PersistenceContext specify unitName attribute and "Undeploy-Deploy' the app on glassfish. It should work.
I am using Netbeans for my project.
Hope it helps someone.
BTW, I appreciate all for sharing the knowledge of Persistence Context in this thread. It definitely helps a newbie like me to understand these things in a better way.
This link is also helpful
http://trailblazer.demo.jboss.com/EJB3Trail/persistence/config/
Thanks
Tom
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