[hibernate-issues] [Hibernate-JIRA] Issue Comment Edited: (HHH-5143) Lazy Loading Not Working for @OneToOne Associations With LazyToOneOption.PROXY

Lazy Loading Not Working for @OneToOne Associations With LazyToOneOption.PROXY ------------------------------------------------------------------------------ Key: HHH-5143 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5143 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.5.1 Environment: Hibernate Core 3.5.1-Final, MySQL 5.1 Reporter: j nadler I'm using 3.5.1. Two persistent entities, parent and child, are in a one to one relationship: In Parent, the reference to Child: @OneToOne(optional=false, fetch=FetchType.LAZY, cascade={ CascadeType.MERGE, CascadeType.REMOVE, CascadeType.REFRESH, CascadeType.PERSIST }) @LazyToOne(LazyToOneOption.PROXY) @JoinColumn(name = "childId") @ForeignKey(name="FK_Parent_Child") @IndexedEmbedded() public Child getChild() { return child; } public void setChild(Child child) { this.child = child; } And in Child, the reference to Parent: @OneToOne(mappedBy="child", fetch=FetchType.LAZY) @LazyToOne(LazyToOneOption.PROXY) @ContainedIn public Parent getParent() { return parent; } public void setParent(Parent parent) { this.parent = parent; } When I load a Parent entity via HQL, I see three SQL queries: -one that corresponds to my HQL query -one that loads Child -one that loads Parent from the Child's perspective I'm watching it in JProfiler and it's hurting our app performance significantly because Child contains LOBs that are rarely needed. I tried making it a unidirectional association (no reference from Child back to Parent) but the expensive SQL call (loading Child) still happens. That gets it down to two SQL queries: -one that corresponds to my HQL query -one that loads Child (the expensive one) We are using the stock javassist proxies and no bytecode enhancement.