proble with lazy loading

[Anshu Dhamija]

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Hi 

   I am facing problem if I specify fetchType as lazy

I have made the following entry in web.xml

<filter>

        <filter-name>lazyLoadingFilter</filter-name>

        <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>

       

    </filter>

And following in my model

@ManyToMany(fetch = FetchType.EAGER)

      @JoinTable(

            name="user_roles",

            joinColumns = { @JoinColumn( name="user_id") },

            inverseJoinColumns = @JoinColumn( name="role_id")

    )

    public Set<Role> getRoles() {

            return roles;

        }

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.mps.stats.model.User.roles, no session or session was closed

        at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)

        at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)

        at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)

        at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)

        at org.hibernate.collection.PersistentSet.toArray(PersistentSet.java:179)

        at com.mps.stats.model.User.getAuthorities(User.java:164)

        at org.acegisecurity.providers.dao.AbstractUserDetailsAuthenticationProvider.createSuccessAuthentication(AbstractUserDetailsAuthenticationProvider.java:199)

        at org.acegisecurity.providers.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:178)

        at org.acegisecurity.providers.ProviderManager.doAuthentication(ProviderManager.java:195)

        at org.acegisecurity.AbstractAuthenticationManager.authenticate(AbstractAuthenticationManager.java:45)

        at org.acegisecurity.ui.webapp.AuthenticationProcessingFilter.attemptAuthentication(AuthenticationProcessingFilter.java:71)

        at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:252)

        at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)

        at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)

        at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)

        at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)

        at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)

        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)

        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)

        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)

        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)

        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)

        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)

        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:722)

        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:404)

        at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)

        at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)

        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)

        at org.mortbay.jetty.Server.handle(Server.java:324)

        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)

        at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:842)

        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:648)

        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)

        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)

        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)

        at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450)

 

 

Regards

Anshu