I dot the following error even though I already created the open session in view.

The error message:

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: ... no session or session was closed

My spring configuration file has this segment:

<filter>
<filter-name>hibernateFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>targetBeanName</param-name>
<param-value>openSessionInViewInterceptor</param-value>
</init-param>
</filter>

What happen is that in a jsp page, I retrieve an object, then in that object I get a collection (a member of the object). When I start to iterate over this collection that is when I get the error.

Looking into the exception stack trace, it's clearly that the open session in view filter is used:

at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:183)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

I found the problem. Set the flag alwaysUseNewSession to false and it works.

After I found the solution above, I found more problem.

This is something to do with a background thread. I try to solve this problem by doing this:

The problem is that the read object use hibernateTemplate.find to locate the object, and a similar exception is shown. So, I change the code to:


This code, give me the following error:

org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here

How do we deal with background thread here?

Thanks.