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copied!<p>Gaston, I have some suggestions/questions for you:</p> <p><strong>1 - Is this the code you're trying to execute?</strong></p> <pre><code>package entity; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; import org.apache.log4j.BasicConfigurator; import org.apache.log4j.Level; import org.apache.log4j.Logger; import org.junit.After; import org.junit.Before; import org.junit.Test; public class PersonTest { private EntityManagerFactory emf; private EntityManager em; @Before public void initEmfAndEm() { BasicConfigurator.configure(); Logger.getLogger("org").setLevel(Level.ERROR); emf = Persistence.createEntityManagerFactory("examplePersistenceUnit"); em = emf.createEntityManager(); } @After public void cleanup() { em.close(); } @Test public void emptyTest() { } } </code></pre> <p>If it is, try to comment this line: "Logger.getLogger("org").setLevel(Level.ERROR);". Or change it to "Logger.getLogger("org").setLevel(Level.ALL);". Then you should see the errors on the output console.</p> <p><strong>2 - In your persistence.xml I see you're using hsqldb database. Did you installed/configured it properly?</strong></p> <p>If you dont't know this database, I suggest you use MySQL, PostgreSQL, or some database you are familiar with.</p> <p><strong>3 - Check you persistence.xml. Mine is a little bite different:</strong></p> <pre><code><?xml version="1.0" encoding="UTF-8"?> <persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> <persistence-unit name="App1PU" transaction-type="RESOURCE_LOCAL"> <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> <class>com.entities.User</class> <class>com.entities.Group</class> <properties> <property name="javax.persistence.jdbc.url" value="jdbc:mysql://myIP:3306/mydatabase"/> <property name="javax.persistence.jdbc.password" value="secret"/> <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/> <property name="javax.persistence.jdbc.user" value="myUser"/> </properties> </persistence-unit> </persistence> </code></pre> <p>Notice the header has some XML declarations that might be important, since Hibernate is telling you that your file is incorrect.</p>

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