Many to many relationships doesn't shown in JSON. Spring + JPA - json

Question

The relationships works fine, the tables are created and the data is inserted correctly. But when page loads in browser, many to many relationships doesn't shown.
But professions are not null:
Here is my entities:
#Entity
#Table(name = "users")
public class User {
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Column(name = "login", nullable = true, length = 50)
private String login;
#Column(name = "pass", nullable = true, length = 50)
private String password;
#Column(name = "name", nullable = false, length = 50)
private String name;
....
public User() {
}
#ManyToMany(fetch = FetchType.EAGER)
#JoinTable(name="worker_profession", joinColumns =#JoinColumn(name="id_user", referencedColumnName="id"),
inverseJoinColumns = #JoinColumn(name="id_profession", referencedColumnName="id")
)
private Set<Profession> profession;
public Set<Profession> getProfession() {
return profession;
}
public void setProfession(Set<Profession> profession) {
this.profession = profession;
}
...
}
And:
#Entity
#Table(name = "profession")
public class Profession {
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
#Column(name = "profession_name", nullable = false, length = 50)
private String professionName;
public Profession() {
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getProfessionName() {
return professionName;
}
public void setProfessionName(String professionName) {
this.professionName = professionName;
}
#ManyToMany(fetch = FetchType.EAGER, mappedBy = "profession")
private Set<User> users;
public Set<User> getUsers() {
return users;
}
public void setUsers(Set<User> users) {
this.users = users;
}
}
in UserController.class I have:
#RestController
#RequestMapping("/user")
public class UserController {
#Autowired
private UserRepository userRepository;
#RequestMapping(value = "", method = RequestMethod.GET)
#ResponseBody
public List<User> getAllUsers() {
return userRepository.findAll();
}
...
}
So, where is my mistake? Thanks.