Hello,

I am trying to get started with JPA. I have installed the Hibernate tools beta 11 and added the jars that go with the core and the annotations project. However, when I try to create the reverse-eng file, I get the error below.

Any thoughts on where the error could be?

asegurate que el archivo de persistencia realmente exista y se encuente
en el directorio META-INF de tu aplicacion



Now it’s important to define a config file for your EntityManager. This file is named “persistence.xml” and has to be located in the “META-INF” directory (I think this is often a source of failure: Even in an exploded JAR-structure, the EntityManager factory looks for a “META-INF/persistence.xml”!)



In all cases, persistence.xml always resides in {root-of-persistence-unit}/META-INF/ directory. For example,


foo.war:
WEB-INF/classes/META-INF/persistence.xml //good
WEB-INF/classes/com/foo123/jpa/Project.class
WEB-INF/web.xml
index.jsp

You may also package entity classes and persistence.xml inside a library jar, which is packaged inside the war:
WEB-INF/lib
foo.war:
WEB-INF/lib/my-entities.jar
WEB-INF/web.xml
index.jspmy-entities.jar:
META-INF/persistence.xml //good
com/foo123/jpa/Project.class