LazyInitializationException when field is eager

Question

I have class OmQcActivity like this:

@Entity
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
@Table(name="OM_QC_ACTIVITY")
public class OmQcActivity{
   @ManyToOne(fetch = FetchType.EAGER)
   @JoinColumn(name="STATUS_ID")
   private Codesc status;
}

codesc is another entity.

In my code I wrote:

OmQcActivity  myactivity = findQCActivityById(5);
Codesc status = myactivity.getCodesc();

@Transactional(readOnly = true, propagation = Propagation.SUPPORTS)
    public OmQcActivity findQCActivityById(Long id) {
        return session.load(persistentClass, id);
    }

however, I get:

org.hibernate.LazyInitializationException: could not initialize proxy - no Session
    at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:86)
    at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:140)
    at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190)
    at com.mycompany.model.OmQcActivity_$$_javassist_11.getStatus(OmQcActivity_$$_javassist_11.java)

how can I get Lazy exception if the fetch type is eager?

Show please Codesc code. – Vladimir Ivanov Mar 31 '11 at 17:37 — Vladimir Ivanov, Mar 31 '11 at 17:37

score 4 · Accepted Answer · answered Mar 31 '11 at 17:39

4

load() doesn't load an entity immediately, it returns a lazy proxy that fetches the real data at the first method call. In most cases you need to use get() instead of load().

answered Mar 31 '11 at 17:39

axtavt

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@Odelya: In this case there are no noticeable difference in performance. – axtavt Apr 04 '11 at 08:36

score 0 · Answer 2 · answered Mar 31 '11 at 17:38

0

Found this link. If you have CollectionOfElements annotation in your Codesc entity, then the exception about lazy initialization will be raised.

answered Mar 31 '11 at 17:38

Vladimir Ivanov

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LazyInitializationException when field is eager

2 Answers2

Linked