JPA Validator signs that Entity "EntityName" has no Id or EmbeddedId when that class extends another Entity Class with @Id defined on Super Class -------------------------------------------------------------------------------------------------------------------------------------------------- Key: JBIDE-2040 URL: http://jira.jboss.com/jira/browse/JBIDE-2040 Project: Tools (JBoss Tools) Issue Type: Bug Components: Hibernate Affects Versions: 2.0.1 Environment: Eclipse 3.3.2 with Jboss Tools 2.0.1GA Reporter: Rafael Benevides @Entity public class Person extends BaseEntity{ // other properties } @MappedSuperclass public abstract class BaseEntity implements Serializable { @Id private Long id; //Getters and Setters } Eclipse JPA Validator shows: Entity "Person" has no Id or EmbeddedId -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira