Caused by: javax.persistence.PersistenceException: Unable to find field or method: class [Ljava.lang.Object;#arg0 at
org.hibernate.ejb.util.PersistenceUtilHelper$MetadataCache.findMember(PersistenceUtilHelper.java:201) at 
org.hibernate.ejb.util.PersistenceUtilHelper$MetadataCache.getMember(PersistenceUtilHelper.java:176) at 
org.hibernate.ejb.util.PersistenceUtilHelper.get(PersistenceUtilHelper.java:89) at 
org.hibernate.ejb.util.PersistenceUtilHelper.isLoadedWithReference(PersistenceUtilHelper.java:81) at 
org.hibernate.ejb.HibernatePersistence$1.isLoadedWithReference(HibernatePersistence.java:93) at 
javax.persistence.Persistence$1.isLoaded(Persistence.java:98) at 
org.hibernate.validator.internal.engine.resolver.JPATraversableResolver.isReachable(JPATraversableResolver.java:57) at 
org.hibernate.validator.internal.engine.resolver.DefaultTraversableResolver.isReachable(DefaultTraversableResolver.java:130) at 
org.hibernate.validator.internal.engine.resolver.SingleThreadCachedTraversableResolver.isReachable(SingleThreadCachedTraversableResolver.java:46) at 
org.hibernate.validator.internal.engine.ValidatorImpl.isCascadeRequired(ValidatorImpl.java:1259)