Using with JSF - HIbernate validation fails (javax.validation.ConstraintViolationException) - spring

Question

I'm using JSF, Spring and Hibernate. Post model has Hibernate annotated attributes:
#Entity
#Table(name = "posts")
public class Post implements Serializable {
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "id")
private Long id;
private int version;
#Column(name = "title")
#NotEmpty(message = "Title should not be empty")
private String title;
... getters/setters
}
When I try to create a new Post in the corresponding bean(disregard syntax proper à pretty-faces) :
#Component
#ManagedBean
#RequestScoped
#URLMappings(mappings = {
#URLMapping(id = "posts", pattern = "/posts/", viewId = "/faces/posts/list.xhtml"),
#URLMapping(id = "new", pattern = "/posts/new", viewId = "/faces/posts/new.xhtml")
})
public class PostBean {
#Autowired
private PostService postService;
private List<Post> posts;
private Post post = new Post();
public List<Post> getPosts() {
return postService.findAll();
}
public Post getPost() {
return post;
}
public void setPost(Post post) {
this.post = post;
}
public String create(Post post) {
this.post = postService.save(post);
return "pretty:posts";
}
}
PostRepository:
public interface PostRepository extends CrudRepository<Post, Long> {
public Post findByTitleIgnoreCase(String title);
}
PostServiceImpl:
#Service("postService")
#Repository
#Transactional
public class PostServiceImpl implements PostService {
#Autowired
private PostRepository postRepository;
#Override
#Transactional(readOnly = true)
public List<Post> findAll() {
return Lists.newArrayList(postRepository.findAll());
}
#Override
#Transactional(readOnly = true)
public Post findById(Long id) {
return postRepository.findOne(id);
}
#Override
#Transactional(readOnly = true)
public Post findByTitleIgnoreCase(String title) {
return postRepository.findByTitleIgnoreCase(title);
}
#Override
#Transactional
public Post save(Post post) {
return postRepository.save(post);
}
#Override
public void destroy(Post post) {
postRepository.delete(post);
}
}
I get the javax.validation.ConstraintViolationException. Strange is that if remove Hibernate annotation and put required="true" directly into the JSF page aside to the title textfield, it works.
<h:inputText id="title" value="#{postBean.post.title}" required="true"/>
Any idea ? You can find the project code source at my github repo
Thank you.
#NotNull is a JSR303 validation, #NotEmpty - is the one by Hibernate, that is the only difference. Even after changing for #NotNull I still get the same error.
[update] By the way, I removed #ManagedBean annotation, it is not needed anymore.
[update-2] #AVolpe: It will change nothing, just move the message to be displayed aside of the title textfield. The error happens when calling:
public String create(Post post) {
this.post = postService.save(post);
return "pretty:posts";
}

Answer 1

Because this error the version 2.2.6 of JSF don't work well with BeanValidation, update to the version 2.2.7 or downgrade to 2.2.4.
See:
This answer

Answer 2

Fixed by upgrading jsf version up 2.2.7 as suggested by AVolpe.