Staffan Hörke ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMGQzZjFmNjFk... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16473?atlOrigin=eyJpIjoiMGQzZj... ) HHH-16473 ( https://hibernate.atlassian.net/browse/HHH-16473?atlOrigin=eyJpIjoiMGQzZj... ) Join fetch a recursive relationship with EmbeddedId fetches wrong values ( https://hibernate.atlassian.net/browse/HHH-16473?atlOrigin=eyJpIjoiMGQzZj... ) Issue Type: Bug Affects Versions: 6.2.1 Assignee: Unassigned Components: hibernate-core Created: 14/Apr/2023 07:33 AM Priority: Minor Reporter: Staffan Hörke ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=712020%... ) Given an entity with an embedded id and a recursive parent/child relationship, when querying a child instance with a join fetch to the parent, the child instance is populated with values that belongs to the parent instance. *Domain model* @Entity(name = "OrganizationWithEmbeddedId" ) public static class OrganizationWithEmbeddedId { @EmbeddedId private OrganizationId id; private String name; @ManyToOne private OrganizationWithEmbeddedId parent; @OneToMany(mappedBy = "parent" ) private Set<OrganizationWithEmbeddedId> children; public OrganizationWithEmbeddedId() { } public OrganizationWithEmbeddedId(OrganizationId id, String name) { this.id = id; this.name = name; } public String getName() { return name; } public void setName( String name) { this.name = name; } public OrganizationWithEmbeddedId getParent() { return parent; } public void setParent(OrganizationWithEmbeddedId parent) { this.parent = parent; } public Set<OrganizationWithEmbeddedId> getChildren() { return children; } public void addChild(OrganizationWithEmbeddedId child) { if (children == null ) { children = new HashSet<>(); } children.add(child); child.setParent( this ); } @Override public boolean equals( Object o) { if ( this == o) return true ; if (o == null || getClass() != o.getClass()) return false ; OrganizationWithEmbeddedId that = (OrganizationWithEmbeddedId) o; return Objects.equals(id, that.id); } @Override public int hashCode() { return Objects.hash(id); } } @Embeddable public static class OrganizationId implements java.io.Serializable { private static final long serialVersionUID = 1L; @Column(name = "id" ) private long value; OrganizationId() { super (); } OrganizationId( long value) { this.value = value; } @Override public String toString() { return Long.toString(value); } @Override public boolean equals( Object o) { if ( this == o) return true ; if (o == null || getClass() != o.getClass()) return false ; OrganizationId that = (OrganizationId) o; return value == that.value; } @Override public int hashCode() { return Objects.hash(value); } } *Query* SELECT child FROM OrganizationWithEmbeddedId child JOIN FETCH child.parent WHERE child.id = :id *Result* The name property of the child instance is wrong. It has the value from the parent instance. ( https://hibernate.atlassian.net/browse/HHH-16473#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16473#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100221- sha1:8830b7c )