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ymoussa
 Post subject: NonUniqueObjectException
PostPosted: Fri Jul 29, 2005 12:51 pm 
Newbie

Joined: Tue Jun 21, 2005 10:11 pm
Posts: 6
Location: Canada
Need help with Hibernate? Read this first:
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I'm working on application that will be deployed on Weblogic 8. I'm using dataSource (see Hibernate config file). The probelm is when I try to add my object (BOM) BOMDAO.add(bom), i'm getting org.hibernate.NonUniqueObjectException. When I use direct connection to DB this exception disappears.
I Followd the steps mentioned in Hibernate documentation for CMT it doesn't work.


Hibernate version:3

Here's my object's mapping file:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping
>
<class
name="com.mot.edc.cia.model.BOM"
table="BOM"
>

<id
name="id"
column="BOM_ID"
type="long"
>
<generator class="native">
<!--
To add non XDoclet generator parameters, create a file named
hibernate-generator-params-BOM.xml
containing the additional parameters and place it in your merge dir.
-->
</generator>
</id>

<many-to-one
name="laptopFiles"
class="com.mot.edc.cia.model.LaptopFiles"
cascade="save-update"
outer-join="auto"
update="true"
insert="true"
unique="true"
column="LAPTOPFILES_ID"
not-null="false"
/>

<many-to-one
name="pdaFiles"
class="com.mot.edc.cia.model.PDAFiles"
cascade="save-update"
outer-join="auto"
update="true"
insert="true"
unique="true"
column="PDAFILES_ID"
not-null="false"
/>

<property
name="description"
type="java.lang.String"
update="true"
insert="true"
column="FILE_DESC"
not-null="true"
/>

<property
name="fileContent"
type="blob"
update="true"
insert="true"
column="FILE_CONTENT"
not-null="true"
lazy="true"
/>

</class>

</hibernate-mapping>



my hibernate configuration :
Mapping documents:<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.OracleDialect</property>
<property name="hibernate.connection.datasource">hibernateDS</property>
<property name="transaction.factory_class">org.hibernate.transaction.CMTTransactionFactory</property>
<property name="transaction.manager_lookup_class">org.hibernate.transaction.WeblogicTransactionManagerLookup</property>
<property name="hibernate.query.factory_class">org.hibernate.hql.ast.ASTQueryTranslatorFactory</property>
<property name="hibernate.connection.autocommit">false</property>

<property name="hibernate.transaction.flush_before_completion">true</property>
<property name="hibernate.connection.release_mode">auto</property>
<property name="hibernate.transaction.auto_close_session">auto</property>

<!-- property name="hibernate.session_factory_name">java:hibernate/SessionFactory</property>
<property name="jndi.url">10.32.81.59:7011</property>
<property name="jndi.class">weblogic.jndi.WLInitialContextFactory</property-->
<mapping resource="Vendor.hbm.xml"/>
<mapping resource="Bundle.hbm.xml"/>
<mapping resource="BOM.hbm.xml"/>
<mapping resource="BOMAssignment.hbm.xml"/>
<mapping resource="BOMFile.hbm.xml"/>
<mapping resource="ReleasedFile.hbm.xml"/>
<mapping resource="School.hbm.xml"/>
<mapping resource="SalesRepAccount.hbm.xml"/>
<mapping resource="VendorConfigurationInfo.hbm.xml"/>
<mapping resource="EDCForm.hbm.xml"/>
<mapping resource="LaptopFiles.hbm.xml"/>
<mapping resource="PDAFiles.hbm.xml"/>
<mapping resource="PostDeploymentExeFiles.hbm.xml"/>
<!--mapping resource="Event.hbm.xml"/>
<mapping resource="EventLocation.hbm.xml"/-->

</session-factory>
</hibernate-configuration>

Code between sessionFactory.openSession() and session.close():

public class BOMDAO
{
Session session = null;
Transaction transaction = null;



/**
* Add new BOM
* @param bom
*/
public Long addBom(BOM bom){
Long createdId = null;
try{
startTransaction();
createdId = (Long)session.save(bom);
commitTransaction();
}catch (HibernateException ex){
throw new InfrastructureException(ex);
}
return createdId;
}


/**
* Begin a new transaction
*/
private void startTransaction() {
SessionFactory sF = new Configuration().configure() .buildSessionFactory();
session = sF.openSession();
transaction = session.beginTransaction();
}

/**
* Commit current transaction and close the session
*/
public void commitTransaction(){
transaction.commit();
session.flush();
session.close();
}
}







Full stack trace of any exception that occurs:javax.faces.FacesException: #{ejbClientDelegateController.submitBOM}: javax.faces.el.EvaluationException: javax.ejb.EJBException: EJB Exception: : com.mot.edc.cia.exceptions.InfrastructureException: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.mot.edc.cia.model.ReleasedFile#com.mot.edc.cia.model.ReleasedFileCompId@3ea3678]
at com.mot.edc.cia.dao.BOMDAO.addBom(BOMDAO.java:55)
at com.mot.edc.cia.ejb.releaseManager.ReleaseManagerImpl.submitBOM(ReleaseManagerImpl.java:255)
at com.mot.edc.cia.ejb.releaseManager.ReleaseManagerBean_yrgv2s_ELOImpl.submitBOM(ReleaseManagerBean_yrgv2s_ELOImpl.java:208)
at com.mot.edc.cia.view.common.action.EJBClientDelegateController.submitBOM(EJBClientDelegateController.java:80)
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:324)
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:126)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:72)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:267)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:381)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:75)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.mot.edc.cia.view.releasemanager.managedbean.bomupload.UploadFilter.doFilter(UploadFilter.java:98)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6724)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
Caused by: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.mot.edc.cia.model.ReleasedFile#com.mot.edc.cia.model.ReleasedFileCompId@3ea3678]
at org.hibernate.engine.PersistenceContext.checkUniqueness(PersistenceContext.java:586)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:254)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:214)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:91)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:468)
at org.hibernate.engine.Cascades$5.cascade(Cascades.java:154)
at org.hibernate.engine.Cascades.cascadeAssociation(Cascades.java:771)
at org.hibernate.engine.Cascades.cascade(Cascades.java:720)
at org.hibernate.engine.Cascades.cascade(Cascades.java:847)
at org.hibernate.event.def.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:332)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:214)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:160)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:108)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:96)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:468)
at org.hibernate.engine.Cascades$5.cascade(Cascades.java:154)
at org.hibernate.engine.Cascades.cascadeAssociation(Cascades.java:771)
at org.hibernate.engine.Cascades.cascade(Cascades.java:720)
at org.hibernate.engine.Cascades.cascadeCollection(Cascades.java:895)
at org.hibernate.engine.Cascades.cascadeAssociation(Cascades.java:792)
at org.hibernate.engine.Cascades.cascade(Cascades.java:720)
at org.hibernate.engine.Cascades.cascade(Cascades.java:847)
at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:363)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:265)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:160)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:108)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:96)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:468)
at org.hibernate.engine.Cascades$5.cascade(Cascades.java:154)
at org.hibernate.engine.Cascades.cascadeAssociation(Cascades.java:771)
at org.hibernate.engine.Cascades.cascade(Cascades.java:720)
at org.hibernate.engine.Cascades.cascade(Cascades.java:847)
at org.hibernate.event.def.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:332)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:214)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:160)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:108)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:481)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:476)
at com.mot.edc.cia.dao.BOMDAO.addBom(BOMDAO.java:51)
... 29 more
; nested exception is: com.mot.edc.cia.exceptions.InfrastructureException: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.mot.edc.cia.model.ReleasedFile#com.mot.edc.cia.model.ReleasedFileCompId@3ea3678]
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:78)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:
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jdl
 Post subject:
PostPosted: Fri Jul 29, 2005 1:12 pm 
Regular
Regular

Joined: Thu May 26, 2005 2:08 pm
Posts: 99
Caveat: I have never used Hibernate with CMT.

Having said that, it doesn't look like your code mathces the documentation at all for dealing with CMT, plus there are some other questionable elements in here.

Code:
public class BOMDAO
{
Session session = null;
Transaction transaction = null;


This looks odd.


Code:
/**
* Add new BOM
* @param bom
*/
public Long addBom(BOM bom){
Long createdId = null;
try{
startTransaction();
createdId = (Long)session.save(bom);
commitTransaction();
}catch (HibernateException ex){
throw new InfrastructureException(ex);
}
return createdId;
}


From the FAQ:
How do I use Hibernate with CMT?

Just do it. CMT means neither Hibernate nor user code needs to worry about starting / stopping transactions. You should remember to set hibernate.transaction.manager_lookup_class for your application server.

In a CMT environment, it makes a great deal of sense to use SessionFactory.getCurrentSession(), and leave session management to Hibernate.


Code:
/**
* Begin a new transaction
*/
private void startTransaction() {
SessionFactory sF = new Configuration().configure() .buildSessionFactory();
session = sF.openSession();
transaction = session.beginTransaction();
}


Building a new SessionFactory every time you need a transaction seems horribly inefficient.

Code:
/**
* Commit current transaction and close the session
*/
public void commitTransaction(){
transaction.commit();
session.flush();
session.close();
}
}



If you haven't read it already, I would highly recommend you read this.
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ymoussa
 Post subject: NonUniqueObjectException
PostPosted: Fri Jul 29, 2005 11:40 pm 
Newbie

Joined: Tue Jun 21, 2005 10:11 pm
Posts: 6
Location: Canada
Thank you for replying...

I'm new to Hibernate, I never used it before.
Thank you for the advise, I will change my code as by the documentation, hope it will work.
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