[hibernate-issues] [Hibernate-JIRA] Closed: (HHH-4409) Infinite loop occurs while doing findById on a Parent domain Object having OneToMany relationship with child domain with composite primary key

Infinite loop occurs while doing findById on a Parent domain Object having OneToMany relationship with child domain with composite primary key ---------------------------------------------------------------------------------------------------------------------------------------------- Key: HHH-4409 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4409 Project: Hibernate Core Issue Type: Improvement Components: annotations Environment: Hibernate Annotations 3.4.0.GA, HSqlDB and Oracle Reporter: Steve Ebersole Attachments: Organization.java, OrganizationApplications.java, OrganizationApplicationsPK.java We are using Hibernate annotations version 3.4.0.G.A We are establishing a OneToMany relationship using the annotation @OnetoMany for a Parent and Child domain objects where the child domain has a composite primary key. We have two domain objects Organization [Parent] OrganizationApplications [Child] We want to have a OnetoMany relationship between Organization and OrganizationApplications. As shown below OrganizationApplications contains a composite primary key, of two columns(Organization Id, ApplicationId[foreignkey from other table called APPLICATIONS]) Organizations.java ------------------- @OneToMany(targetEntity=gov.osc.enrollment.backend.domain.OrganizationApplications.class, cascade=CascadeType.ALL, fetch = FetchType.EAGER, mappedBy="id.organization") private Set<OrganizationApplications> organizationApps = new HashSet<OrganizationApplications>(); OrganizationApplications.java --------------------------------------------------------------------- public class OrganizationApplications extends EnvelopeInfo implements Serializable { private static final long serialVersionUID = 1L; @EmbeddedId private OrganizationApplicationsPK id; public OrganizationApplicationsPK getId() { return id; } public void setId(OrganizationApplicationsPK id) { this.id = id; } OrganizationApplicationsPK.java --------------------------------------------------------------------- @Embeddable public class OrganizationApplicationsPK implements Serializable { private static final Long serialVersionUID = 1L; public OrganizationApplicationsPK() { super(); } @ManyToOne @JoinColumn(name="APPLICATION_ID",nullable=false) private Applications application; @ManyToOne(targetEntity=gov.osc.enrollment.backend.domain.Organization.class, cascade=CascadeType.ALL) @JoinColumn(name="ORGANIZATION_ID", referencedColumnName="ORGANIZATION_ID", nullable=false, insertable=true, updatable=true) private Organization organization; public Applications getApplication() { return application; } public void setApplication(Applications application) { this.application = application; } public Organization getOrganization() { return organization; } public void setOrganization(Organization organization) { this.organization = organization; } @Override public boolean equals(Object o) { if (o == this) { return true; } if ( ! (o instanceof OrganizationApplicationsPK)) { return false; } OrganizationApplicationsPK other = (OrganizationApplicationsPK) o; return (this.getOrganization().getId() == other.getOrganization().getId()) && (this.getApplication().getId() == other.getApplication().getId()); } @Override public int hashCode() { final int prime = 31; int hash = 17; hash = hash * prime + ((int) (this.getOrganization().getId() ^ (this.getOrganization().getId() >>> 32))); hash = hash * prime + ((int) (this.getApplication().getId() ^ (this.getApplication().getId() >>> 32))); return hash; } } Please see the attached java files for complete code and also the exception stack trace. Questions: 1. When we do a findById query on Organization table the system goes into infinite loop and never gets out . How ever we are able to insert a record in Organization and its child OrganizationApplications. 2. In the Organization.java domain, if you notice we are using mappedby="id.organization". Is this a valid mapping ? If not why does this parameter work for insert and not for a entityManager.findById, doing so leads to infinite loop.