Pessoal, quando rodo o servidor me deparo com esse erro, logo após a aula de configuração do hibernate / JPA e entity Manager:
SEVERE: StandardWrapper.Throwable org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class helloworld.app.config.JPAConfiguration: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean helloworld.app.config.JPAConfiguration.entityManagerFactory()] threw exception; nested exception is java.lang.NoClassDefFoundError: org/hibernate/HibernateException
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean helloworld.app.config.JPAConfiguration.entityManagerFactory()] threw exception; nested exception is java.lang.NoClassDefFoundError: org/hibernate/HibernateException at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:188) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:590)