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  1. ,
    Expert tip

    You might've forgot to add a dependency or it's written wrong. Also, you might be using incompatible versions of Java and Hibernate. More on this here:

  2. ,

    You are not deploying the oracle driver with the application. Place the driver jars in a shared or library extension folder of your application server. (You should go with option one or two though

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java.lang.ClassNotFoundException: javax.transaction.SystemException	at$ Source)	at$ Source)	at Method)	at Source)	at java.lang.ClassLoader.loadClass(Unknown Source)	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)	at java.lang.ClassLoader.loadClass(Unknown Source)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Unknown Source)	at org.jboss.logging.Logger$	at Method)	at org.jboss.logging.Logger.getMessageLogger(	at org.jboss.logging.Logger.getMessageLogger(	at org.hibernate.jpa.internal.HEMLogging.messageLogger(	at org.hibernate.jpa.internal.HEMLogging.messageLogger(	at org.hibernate.jpa.boot.internal.PersistenceXmlParser.(	at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(	at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(	at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(	at javax.persistence.Persistence.createEntityManagerFactory(	at javax.persistence.Persistence.createEntityManagerFactory(	at m1key.dogs.dao.GenericDAO.(	at m1key.dogs.DogLauncher.main(