Error creating bean with name 'criadorDeProdutos':

Pessoal estou com um problema.

GRAVE: Exception sending context initialized event to listener instance of class [org.springframework.web.context.ContextLoaderListener]

org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘criadorDeProdutos’: Invocation of init method failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Could not open connection
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1566)

fonte: https://github.com/podwesley/JavaEE/tree/JavaWEB/projeto-jpa-2