Hi, is there anyone know this problem? I am currently integrating JPA using Spring and Hibernate in order to access EntityManager.merge(...). By default, I was included session factory (including hibernate hbm xml mapping) and HibernateDaoSupport which provided by Spring feature. However, because I integrate with ZK, which force to include the hibernate session merge converter which is required the merge the entity to resolved the "lazy initialization exception". To include this merging, I utilize on EJB, JPA, and Spring IoC which will describe in the following:


persistence.xml
...
<persistence-unit name="persistenceManager" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence </provider>
</persistence-unit>
</persistence>
...


jpa context xml:

...
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityMana gerFactoryBean"></bean>

<!-- bean post-processor for JPA annotations -->
<bean class="org.springframework.orm.jpa.support.Persist enceAnnotationBeanPostProcessor" />

<!-- Exception translation bean post processor -->
<bean class="org.springframework.dao.annotation.Persiste nceExceptionTranslationPostProcessor"/>

<bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionM anager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<tx:annotation-driven />
...


HibernateSessionMergeConverter:
...

@Stateless
public class HibernateSessionMergeConverter implements TypeConverter {

@PersistenceContext
private EntityManager em;

public Object coerceToUi(Object val, Component comp) {

if(val instanceof GenericBean){
System.out.println(em==null);
em.merge(val);
}
return val;
}
...

However, it throws "DuplicateMappingException" because of duplication. I tried with alot of way and even to confirm that my hbm xml and bean have no duplication of fields.

The following is the exception thrown:

org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'org.springframework.dao.annotation.PersistenceExc eptionTranslationPostProcessor#0' defined in ServletContext resource [/WEB-INF/resources/xml/jpaApplicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/resources/xml/jpaApplicationContext.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: org.hibernate.DuplicateMappingExceptio
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.doCreateBean(AbstractAu towireCapableBeanFactory.java:478)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory$1.run(AbstractAutowireC apableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.createBean(AbstractAuto wireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.Abstract BeanFactory$1.getObject(AbstractBeanFactory.java:2 64)
at org.springframework.beans.factory.support.DefaultS ingletonBeanRegistry.getSingleton(DefaultSingleton BeanRegistry.java:220)
at org.springframework.beans.factory.support.Abstract BeanFactory.doGetBean(AbstractBeanFactory.java:261 )
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.context.support.AbstractApplic ationContext.getBean(AbstractApplicationContext.ja va:881)
at org.springframework.context.support.AbstractApplic ationContext.registerBeanPostProcessors(AbstractAp plicationContext.java:597)
at org.springframework.context.support.AbstractApplic ationContext.refresh(AbstractApplicationContext.ja va:366)
at org.springframework.web.context.ContextLoader.crea teWebApplicationContext(ContextLoader.java:255)
at org.springframework.web.context.ContextLoader.init WebApplicationContext(ContextLoader.java:199)
at org.springframework.web.context.ContextLoaderListe ner.contextInitialized(ContextLoaderListener.java: 45)
at org.apache.catalina.core.StandardContext.listenerS tart(StandardContext.java:3764)
at org.apache.catalina.core.StandardContext.start(Sta ndardContext.java:4216)
at org.apache.catalina.core.ContainerBase.addChildInt ernal(ContainerBase.java:760)
at org.apache.catalina.core.ContainerBase.addChild(Co ntainerBase.java:740)
at org.apache.catalina.core.StandardHost.addChild(Sta ndardHost.java:544)
at org.apache.catalina.startup.HostConfig.deployDescr iptor(HostConfig.java:626)
at org.apache.catalina.startup.HostConfig.deployDescr iptors(HostConfig.java:553)
at org.apache.catalina.startup.HostConfig.deployApps( HostConfig.java:488)
at org.apache.catalina.startup.HostConfig.start(HostC onfig.java:1149)
at org.apache.catalina.startup.HostConfig.lifecycleEv ent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLife cycleEvent(LifecycleSupport.java:120)
at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1022)
at org.apache.catalina.core.StandardHost.start(Standa rdHost.java:736)
at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1014)
at org.apache.catalina.core.StandardEngine.start(Stan dardEngine.java:443)
at org.apache.catalina.core.StandardService.start(Sta ndardService.java:448)
at org.apache.catalina.core.StandardServer.start(Stan dardServer.java:700)
at org.apache.catalina.startup.Catalina.start(Catalin a.java:552)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootst rap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstr ap.java:433)
Caused by: org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/resources/xml/jpaApplicationContext.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: org.hibernate.DuplicateMappingException: Duplicate collection role mapping User.riskGroups
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.initializeBean(Abstract AutowireCapableBeanFactory.java:1336)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.doCreateBean(AbstractAu towireCapableBeanFactory.java:471)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory$1.run(AbstractAutowireC apableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.createBean(AbstractAuto wireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.Abstract BeanFactory$1.getObject(AbstractBeanFactory.java:2 64)
at org.springframework.beans.factory.support.DefaultS ingletonBeanRegistry.getSingleton(DefaultSingleton BeanRegistry.java:220)
at org.springframework.beans.factory.support.Abstract BeanFactory.doGetBean(AbstractBeanFactory.java:261 )
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultL istableBeanFactory.getBeansOfType(DefaultListableB eanFactory.java:308)
at org.springframework.beans.factory.BeanFactoryUtils .beansOfTypeIncludingAncestors(BeanFactoryUtils.ja va:270)
at org.springframework.dao.support.PersistenceExcepti onTranslationInterceptor.detectPersistenceExceptio nTranslators(PersistenceExceptionTranslationInterc eptor.java:122)
at org.springframework.dao.support.PersistenceExcepti onTranslationInterceptor.<init>(PersistenceExcepti onTranslationInterceptor.java:78)
at org.springframework.dao.annotation.PersistenceExce ptionTranslationAdvisor.<init>(PersistenceExceptio nTranslationAdvisor.java:70)
at org.springframework.dao.annotation.PersistenceExce ptionTranslationPostProcessor.setBeanFactory(Persi stenceExceptionTranslationPostProcessor.java:97)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.initializeBean(Abstract AutowireCapableBeanFactory.java:1324)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.doCreateBean(AbstractAu towireCapableBeanFactory.java:471)
... 38 more


Your help and kindness is highly appreciated