Dear all,
I'm experiencing the same problem as yours, and I'm actually making a kind of hello-world app. So let me send you a tiny ear file wich reproduces the problem.
Thank you for help !
Here is a part of the stack trace :
...
Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName null
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.init(EntityManagerWrapper.java:121)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper._getDelegate(EntityManagerWrapper.java:162)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createNamedQuery(EntityManagerWrapper.java:521)
at fr.compmany.tests.helloapp.session.HelloWorld.getAllMedecinsNames(HelloWorld.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
...
The call refers to HelloWorld.getAllMedecinsNames method, wich tries to query the database.
To run the program : Deploy the web application, connect to
http://localhost:8080/HelloApplicationWeb and call the Servlet from the link.
Thanks a lot
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