I have the following classes User, Region, Country as follows,

public class User {

@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
@Column(name = "first_name")
Private String firstName;
@Column(name = "last_name")
private String lastName;
@OneToOne(fetch = FetchType.EAGER)
@JoinTable(name = "user_country_region", joinColumns ={@JoinColumn(name = "user_id") }, inverseJoinColumns = { @JoinColumn(name = "country_id") })
private Country userCountry;

@OneToOne(fetch = FetchType.EAGER)
@JoinTable(name = "user_country_region", joinColumns = {@JoinColumn(name = "user_id") }, inverseJoinColumns = { @JoinColumn(name = "region_id") })
private Region userRegion;

//With its respective Getters and Setters
}

public class Country {

@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
@Column(name = "name")
private String name;

//With its respective Getters and Setters
}

public class Region {

@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
@Column(name = "name")
private String name;

//With its respective Getters and Setters
}

Tried getting country and region values as below

System.out.println("Country: "+user.getCountry().getName());
System.out.println("Region: "+user.getRegion().getName());

Hibernate Show SQL output as below

Hibernate:
select
this_.id as id1_3_3_,
this_.first_name as first_na2_3_3_,
this_.last_name as last_na3_3_3_,
region2_.id as id1_8_2_,
region2_.name as name2_8_2_
from
user this_
left outer join
user_country_region this_1_
on this_.id=this_1_.user_id
left outer join
region region2_
on this_1_.region_id=region2_.id
where
this_.id=?

Seems missing country details. Kindly assist.

It could be a bug because Hibernate considers that it already joined with "user_country_region" table.

In this case, you either define two junction tables:

- user_country
- user_region

or create a replicating test case and file a Jira issue.