When Session Closed Data Will be Lost in Hibernate

I develop application retrieve data and display data in JSP page.when I retrieve data and store the objects in a vector and put that vector to session then I closed the session.In JSP page I try to use that vector to get data but data will be lost.
I couldn't understand what is happening.Any body have idea about that problem.

Thanks
Sameera

What session are we talking about here? A Hibernate Session or an HttpSession?

Assuming its a Hibernate Session, closing the session will not empty the collection. Can we see your code?

(And why are you using a Vector? Do you need access to its contents to be synchronous?)

What session are we talking about here? A Hibernate Session or an HttpSession?

I am talking about hibernate session.

Can we see your code?

Like I said, closing the session will not empty your Vector. You must have some other issue. Do you fill it in the first place? Is anything returned by your HQL?

Do you fill it in the first place? Is anything returned by your HQL?

I couldn't understand above questions ? Can explain?

Does your query return any results?

Yes that query returns result.

Hi every one didnt get any solution still.

Please help me

Can you post all your code? Where do works and worksh get declared?

Can you post all your code? Where do works and worksh get declared?

There are only three reasons why the Vector would be empty:

An exception occurs

The query returns nothing

Your Session is null

Hibernate clears its Session when you close or flush it. It does not clear any other data unassociated with the Session.

No there is no any exception occur , query is result not empty , session is not null.I only did hibernate session closing then i cant get data on my JSP page through the http session when i didn't close the hibernate session i can get data.

This is the code i put vector in session :

Vector workdedails=wsb.getWorkSummery(wsfb.getEmployeeNumber(),sdate);
session=request.getSession();
session.setAttribute("workdedails",workdedails);

i am also couldn't understand what is happening?

Why is works defined outside your method? Are you expecting only one to ever be returned?

No any special reason i just declare work out side the method.Is there any problem?

This exception throw when i closed method i finally found.

No there is no any exception occur

sorry for before i said no any exception raised.

org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:60)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:140)
at opro.worksheet.WorkSheet$$EnhancerByCGLIB$$5d8fdae2.getBugNumber(<generated>)
at opro.worksheet.WorkSummery.doTag(WorkSummery.java:25)
at org.apache.jsp.Worksheet_jsp._jspService(Worksheet_jsp.java:739)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)

Finally.

You seem to be accessing the WorkSheet.getBugNumber(). This has been given as a proxy by Hibernate, as the session is closed, this is as expected

You have to keep the session open.

Sameera Abeysekara Gunawardena wrote:No any special reason i just declare work out side the method.Is there any problem?

It means your Vector wil only ever have one entry. Is this what you want? And if so, why are you using a collection?

But this is an aside, your exception message tells you what real problem is.

It means your Vector wil only ever have one entry.

I cant understand what was told in above sentence.

Is this what you want?

I want close hibernate session when i open before i leave that code block to save memory

I use vector for store object.I can understand exception before you said like this.

Assuming its a Hibernate Session, closing the session will not empty the collection.

Sameera Abeysekara Gunawardena wrote:

It means your Vector wil only ever have one entry.

I cant understand what was told in above sentence.

My mistake - I'm missreading your code.

I want close hibernate session when i open before i leave that code block to save memory

You can't close the Session if you are using it.

My suggestion would be at this point:

Instead of copying the element directly, make a copy of it into some other element.

Here in the constructor you can copy all the required fields to the new object.

You can't close the Session if you are using it.

Yes i know that. I mean after when i put all the objects in to vector returns by hibernate query.
i want close the session.If not how can i close that hibernate session?

Have a look at this.

I got solution.I modify my code with above code line and assign value to inside the WorkSheet(WorkSheet obj) constructor now is work fine.

works = new WorkSheet( it.next());

Thanks for All