Hi,

I get the following error when I set lazy="true":
"could not initialize proxy - the owning Session was closed"

When I change lazy="false", then it runs successfully.

Why?

Below is the error dump:

org.apache.jasper.JasperException: Exception in JSP: /order_dbaction.jsp:118

115: {
116: // only status field is editable on order edit
117: com.insequence.gv.NewOrder newOrder = dao.getNewOrder(new Long(id));
118: newOrder.setStatus(Integer.parseInt(status));
119:
120: // ask dao to persist the edits
121: if (!(dao.addNewOrder(newOrder)))


Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed
org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:56)
org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:98)
org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:133)
com.insequence.gv.NewOrder$$EnhancerByCGLIB$$e061f894_19.setStatus(<generated>)
org.apache.jsp.order_005fdbaction_jsp._jspService(order_005fdbaction_jsp.java:167)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

This is a classical behaviour.

As said, because the session was closed. Just initialize the proxies before closing the session. You should read about proxies and what is the lazy-loading.

http://www.hibernate.org/hib_docs/v3/re ... ching-lazy