LazyInitializationException on a property

mhazlett · **Joined:** Thu Jul 19, 2007 3:53 pm **Posts:** 7

I'm having issues with getting a property of an object throwing a LIE.
pojo:

Code:

public class EventTypeVO {
    private String description;
    public String getDescription()...
    public void setDescription()..
}

I first call a:

Code:

session.createQuery("from EventTypeVO").list();

which returns a list. I'm able to iterate through this list on my jsp and call:

Code:

eventTypeVO.getDescription();

without any problems. The descriptions display fine. When an eventType is selected, the call goes to a load with the eventTypeId..

Code:

session.load(EventTypeVO.class, eventTypeId);

When I try and access the description (either in the biz or jsp) I get this error:

Code:

LazyInitializationException: could not initialize proxy - the owning Session was closed
EventTypeVO$$EnhancerByCGLIB$$a50e6959.getDescription(<generated>)

I'm lost as to why accessing a property would throw this.
Any ideas?

satsranchuser · **Posted:** Mon Sep 24, 2007 11:35 am

You are probably closing the session. Can you verify is session is open when u loop through the list.

mhazlett · **Joined:** Thu Jul 19, 2007 3:53 pm **Posts:** 7

The list works fine. Its when a specific one is loaded that the error happens.

Code:

session = HibernateUtil.currentSession();
EventTypeVO eventTypeVO = session.load(EventTypeVO.class, eventTypeID);
session.closeSession();
return eventTypeVO;

This should load all of the properties (columns) from the table. My question is, why isn't it?

vikram.batra · **Posted:** Tue Sep 25, 2007 2:34 am

according to me,

when you call ur load function

session = HibernateUtil.currentSession();
[b]EventTypeVO eventTypeVO = session.load(EventTypeVO.class, eventTypeID); [/b]
session.closeSession();
[b]return eventTypeVO;[/b]

the return gives you a proxy of EventTypeVO and not the actual object.This is probably the reason why you are getting the lazy exception.After you call the load function,before returning the VO,fire a getter for any property like

eventTypeVO.getDescription();

This will load the actual values from the table.

you are probably using hibernate version 3.....lazy is false by default in version 3.You will not get this problem in version 2 where lazy is true by default.

mhazlett · **Joined:** Thu Jul 19, 2007 3:53 pm **Posts:** 7

Thanks Vikram for the reply.
So in version 3 lazy applies not only to relationships but properties as well? Is there an attribute I could set in the hbm file to eagerly load the properties, similar to relationships?

Thanks

vikram.batra · **Posted:** Tue Sep 25, 2007 8:44 am

Yes...u probably can set the lazy property in the hbm file.

for instance,

<property name="othercaseDesc" type="string" [b]lazy="false">[/b]
<column name="OTHERCASE_DESC">
<comment></comment>
</column>
</property>

u can set this parameter false for all the properties and even relationships which u want to access eagerly.

I have not tried this myself but i think this might help you out.....