I got this exception, but I understand why....

In Stateful component I have
@PersistenceContext(type=EXTENDED)
EntityManager em;



| javax.faces.FacesException: Error calling action method of component with id simpleAdd:_id91
|      at org.apache.myfaces.application.ActionListenerImpl.processAction (ActionListenerImpl.java:74)
|      at javax.faces.component.UICommand.broadcast (UICommand.java:106)
|      at org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
|      at org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
|      at org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:329)
|      at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication (LifecycleImpl.java:343)
|      at org.apache.myfaces.lifecycle.LifecycleImpl.execute (LifecycleImpl.java:86)
|      at javax.faces.webapp.FacesServlet.service (FacesServlet.java:137)
|      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:269)
|      at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:188)
|      at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter (ExtensionsFilter.java:144)
|      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:215)
|      at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:188)
|      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63)
|      at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:60)
|      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
|      at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
|      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
|      at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
|      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
|      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:53)
|      at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79)
|      at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
|      at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84)
|      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:215)
|      at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:188)
|      at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:96)
|      at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:220)
|      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:215)
|      at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:188)
|      at org.apache.catalina.core.StandardWrapperValve.invoke (StandardWrapperValve.java:210)
|      at org.apache.catalina.core.StandardContextValve.invoke (StandardContextValve.java:174)
|      at org.apache.catalina.authenticator.AuthenticatorBase.invoke (AuthenticatorBase.java:433)
|      at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:127)
|      at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:117)
|      at org.apache.catalina.core.StandardEngineValve.invoke (StandardEngineValve.java:108)
|      at org.apache.catalina.connector.CoyoteAdapter.service (CoyoteAdapter.java:151)
|      at org.apache.coyote.http11.Http11Processor.process (Http11Processor.java:870)
|      at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
|      at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket (PoolTcpEndpoint.java:528)
|      at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt (LeaderFollowerWorkerThread.java:81)
|      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
|      at java.lang.Thread.run (Thread.java:595)
| Caused by: javax.faces.el.EvaluationException: /actions/diary/list.xhtml @118,86 action="#{diaryEntryAction.save}": javax.ejb.EJBException: org.hibernate.LazyIn
| itializationException: failed to lazily initialize a collection of role: cz.bpsolutions.ims.model.Account.diaryEntries, no session or session was closed
|      at com.sun.facelets.el.LegacyMethodBinding.invoke (LegacyMethodBinding.java:73)
|      at org.apache.myfaces.application.ActionListenerImpl.processAction (ActionListenerImpl.java:63)
|      ... 42 more
| Caused by: javax.ejb.EJBException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: cz.bpsolutions.ims.model.Account
| .diaryEntries, no session or session was closed
|      at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
|      at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
|

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