JPA 2.0 Eclipselink - Adding/Deleting to child list gets optimistic lock - jpa

Question

I am having an issue where eclipselink (2.5) is throwing an OptimisticLockException even though the only thing I'm modifiying is trying to either add or remove an item from a child list.
Entities :
#Entity
#Table(name="PLAN_ORG_RELATIONSHIP")
#Customizer(GridCacheCustomizer.class)
#AdditionalCriteria("CURRENT_TIMESTAMP BETWEEN this.startDate AND this.endDate")
#NamedQuery(name="PlanOrganizationRelationship.findAll", query="SELECT p FROM PlanOrganizationRelationship p")
#Portable
public class PlanOrganizationRelationship extends PrismObject implements Serializable {
#OneToMany(mappedBy="planOrganizationRelationship", cascade=CascadeType.PERSIST, orphanRemoval=true)
#PortableProperty(10)
private List<PlanOrganizationAction> planOrganizationActions;
public PlanOrganizationAction addPlanOrganizationAction(PlanOrganizationAction planOrganizationAction) {
getPlanOrganizationActions().add(planOrganizationAction);
planOrganizationAction.setPlanOrgRelationship(this);
return planOrganizationAction;
}
public PlanOrganizationAction removePlanOrganizationAction(PlanOrganizationAction planOrganizationAction) {
getPlanOrganizationActions().remove(planOrganizationAction);
planOrganizationAction.setPlanOrgRelationship(null);
return planOrganizationAction;
}
#Column(name="LST_UPDT_DT")
#Version
#PortableProperty(5)
private Timestamp lastUpdatedDate;
}
Other side of One To Many:
#Entity
#Table(name="PLAN_ORGANIZATION_ACTION")
#Customizer(GridCacheCustomizer.class)
#AdditionalCriteria("CURRENT_TIMESTAMP BETWEEN this.startDate AND this.endDate")
#NamedQuery(name="PlanOrganizationAction.findAll", query="SELECT p FROM PlanOrganizationAction p")
#Portable
public class PlanOrganizationAction extends PrismObject implements Serializable {
#ManyToOne
#JoinColumn(name="PLN_ORG_RLTNP_SEQ_ID")
#PortableProperty(7)
private PlanOrganizationRelationship planOrganizationRelationship;
}
I have 3 paths - Adding new Relationship with Actions (both entities new) or Add an Action or Remove Action
When I am adding both, I perist the parent and the children are persisted as well and that is the expected behavior.
When I try to add or remove I try something like
PrismOrganizationRelationship por = findById (..) //we are spring-data-jpa
por.addPlanOrganizationAction(action);
repo.save(por); // Throws optimistic lock - even though #Version is the same
Not sure what is causing this issue ?

Answer 1

Check cascade=CascadeType.PERSIST. It work only for persist(save newly entity) operation. your operation remove child entity mean updating main entity. Thats why, you need to useCascadeType.MARGE` for update operation.