LazyInitializationException Help please

[Milan Djukic]

Hi all.

Please help me, this is killing me

I have two classes A and B.

public class A{

[...]

@OneToMany(cascade={ALL}, fetch=FetchType.LAZY, mappedBy="a1")
private Set<B> b1=new HashSet<B>();

@OneToMany(cascade={ALL}, fetch=FetchType.LAZY, mappedBy="a2")
private Set<B> b2=new HashSet<B>();

}

public class B{

[...]

@ManyToOne
@JoinColumn(name="test",referencedColumnName="test_id", nullable=false)
private A a1;

@ManyToOne
@JoinColumn(name="test1",referencedColumnName="test_id", nullable=false)
private A a2;

}

And when i call find method of class EntityManager find(A.class,id) i get a org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: ......

How can i solve this, this is really killing me

[kri shan]

change lazy to eager fetching strategy.

[kri shan]

Make sure Hibernate session is used after session is closed