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PODelegatingFilterProxy and LazyInitializationException
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  1. PODelegatingFilterProxy and LazyInitializationException
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    copied!<p>I have an GWt application and I am making a simple crawler to improve my SEO. For that I am using HTMLUnit and a simple code that Google posted using a Filter.</p> <p>In this Filter I need to access the database to load some data, and here is where I get this exception.</p> <pre><code>org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.tapeanding.domain.beans.TFichas.tfichasDescripcioneses, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380) at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365) at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108) at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:186) at com.tapeanding.server.op.impl.OpFicha.cargarDescripcion(OpFicha.java:223) at com.tapeanding.server.op.impl.OpFicha.cargarFicha(OpFicha.java:85) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at $Proxy38.cargarFicha(Unknown Source) at com.tapeanding.server.servlets.CrawlServlet.generarFicha(CrawlServlet.java:198) at com.tapeanding.server.servlets.CrawlServlet.doFilter(CrawlServlet.java:136) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088) 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:729) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:324) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488) </code></pre> <p><strong>- web.xml</strong></p> <pre><code>&lt;!-- Sesion de apertura de Spring --&gt; &lt;filter&gt; &lt;filter-name&gt;session-in-view&lt;/filter-name&gt; &lt;filter-class&gt;org.springframework.orm.hibernate3.support.OpenSessionInViewFilter&lt;/filter-class&gt; &lt;init-param&gt; &lt;param-name&gt;singleSession&lt;/param-name&gt; &lt;param-value&gt;true&lt;/param-value&gt; &lt;/init-param&gt; &lt;/filter&gt; &lt;!-- Filtro para convertir el codigo en HTML --&gt; &lt;filter&gt; &lt;filter-name&gt;crawler&lt;/filter-name&gt; &lt;filter-class&gt;org.springframework.web.filter.DelegatingFilterProxy&lt;/filter-class&gt; &lt;init-param&gt; &lt;param-name&gt;targetFilterLifecycle&lt;/param-name&gt; &lt;param-value&gt;true&lt;/param-value&gt; &lt;/init-param&gt; &lt;/filter&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;session-in-view&lt;/filter-name&gt; &lt;servlet-name&gt;dispatcher&lt;/servlet-name&gt; &lt;/filter-mapping&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;crawler&lt;/filter-name&gt; &lt;url-pattern&gt;/*&lt;/url-pattern&gt; &lt;/filter-mapping&gt; &lt;servlet&gt; &lt;servlet-name&gt;dispatcher&lt;/servlet-name&gt; &lt;servlet-class&gt;org.springframework.web.servlet.DispatcherServlet&lt;/servlet-class&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; </code></pre> <p><strong>- application-context.xml</strong></p> <pre><code> &lt;!-- ========================= Crawler ========================================= --&gt; &lt;bean id="crawler" class="com.tapeanding.server.servlets.CrawlServlet"&gt; &lt;property name="opFicha" ref="opFicha" /&gt; &lt;/bean&gt; &lt;bean id="opFicha" class="com.tapeanding.server.op.impl.OpFicha"&gt; &lt;property name="tFichasDAO" ref="tFichasDAO" /&gt; &lt;property name="tFichasComentariosDAO" ref="tFichasComentariosDAO" /&gt; &lt;/bean&gt; &lt;bean id="tFichasDAO" class="com.tapeanding.server.daos.impl.TFichasDAO"&gt; &lt;property name="sessionFactory" ref="sessionFactory"/&gt; &lt;/bean&gt; &lt;bean id="tFichasDescripcionesDAO" class="com.tapeanding.server.daos.impl.TFichasDescripcionesDAO"&gt; &lt;property name="sessionFactory" ref="sessionFactory"/&gt; &lt;/bean&gt; </code></pre> <p>I don't want to use the "lazy=false" tag because there is a big amount of information I don't need to get in all the cases.</p> <p>Some ideas? Why is this happening when I try to use a bean in a Filter if I'm using the OpenSessionInViewFilter filter?</p> <p>Thanks.</p>
 

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