java.lang.ClassCastException when persisting an entity

[bolke]

Hello,

When persisting an entity I experience some erratic behaviour (meaning I cannot track it down ;-) ). I have the following entities:

public class Ship implements Serializable {
        @OneToMany(mappedBy="ship", cascade=CascadeType.PERSIST)
     private List<Tankgroup> tankgroups;
}

public class Tankgroup implements Serializable {
     @ManyToOne
     @NotNull
     private Ship ship;
     
        @ManyToMany
     private List<Material> materials;
}

public class Material implements Serializable {
     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     public int getId()
}

When I try to update the entity Ship (by using entityManager.persist) I get the following exception:

12:03:48,760 ERROR [SeamPhaseListener] uncaught exception
java.lang.IllegalStateException: Could not commit transaction
     at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:602)
     at org.jboss.seam.jsf.SeamPhaseListener.handleTransactionsAfterPhase(SeamPhaseListener.java:330)
     at org.jboss.seam.jsf.SeamPhaseListener.afterServletPhase(SeamPhaseListener.java:231)
     at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:182)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:280)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
     at java.lang.Thread.run(Unknown Source)
Caused by: javax.transaction.RollbackException: [com.arjuna.ats.internal.jta.transaction.arjunacore.commitwhenaborted] [com.arjuna.ats.internal.jta.transaction.arjunacore.commitwhenaborted] Can't commit because the transaction is in aborted state
     at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1401)
     at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:135)
     at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:87)
     at org.jboss.tm.usertx.client.ServerVMClientUserTransaction.commit(ServerVMClientUserTransaction.java:140)
     at org.jboss.seam.transaction.UTTransaction.commit(UTTransaction.java:52)
     at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:592)
     ... 43 more
Caused by: javax.persistence.PersistenceException: org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of nl.chainsoftware.chemix.model.Material.id
     at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:629)
     at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:524)
     at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:114)
     at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:247)
     at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:86)
     at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:177)
     at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1389)
     ... 48 more
Caused by: org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of nl.chainsoftware.chemix.model.Material.id
     at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:171)
     at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:183)
     at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:3591)
     at org.hibernate.persister.entity.AbstractEntityPersister.isTransient(AbstractEntityPersister.java:3307)
     at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:181)
     at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:218)
     at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397)
     at org.hibernate.type.ManyToOneType.nullSafeSet(ManyToOneType.java:78)
     at org.hibernate.persister.collection.AbstractCollectionPersister.writeElement(AbstractCollectionPersister.java:755)
     at org.hibernate.persister.collection.AbstractCollectionPersister.recreate(AbstractCollectionPersister.java:1143)
     at org.hibernate.action.CollectionRecreateAction.execute(CollectionRecreateAction.java:26)
     at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
     at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234)
     at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:145)
     at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
     at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
     at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
     at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
     at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:515)
     ... 53 more
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException@1ec7c1a
     at sun.reflect.GeneratedMethodAccessor5098.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:145)
     ... 71 more

I don't know what is going on so any help would be appreciated! Regards

[jbalunas.jbalunas.jboss.org]

Could you provide some information on your environment and persistence settings?

Thanks,
Jay

[bolke]

Sure. The development system is: Java 6 / Seam 2.0.1.GA / Jboss 4.2.2.GA / MySQL 5. Persistence is configured from seam-gen (pretty standard config I guess). The backing bean doing the work for persisting this entity is using SMPC. Please note that the behaviour is not entirely consistent. It happens sometimes and sometimes it does not. Unfortunately I am unable to determine a pattern.

components.xml

   <persistence:managed-persistence-context name="entityManager"
                                     auto-create="true"
                      persistence-unit-jndi-name="java:/chemixEntityManagerFactory"/>

persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Persistence deployment descriptor for dev profile -->
<persistence xmlns="http://java.sun.com/xml/ns/persistence" 
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" 
             version="1.0">
             
   <persistence-unit name="chemix">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>java:/chemixDatasource</jta-data-source>
      <properties>
         <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
         <property name="hibernate.hbm2ddl.auto" value="update"/>
         <property name="hibernate.show_sql" value="false"/>
         <property name="hibernate.format_sql" value="true"/>
         <property name="hibernate.use_sql_comments" value="false" />
         <property name="jboss.entity.manager.factory.jndi.name" value="java:/chemixEntityManagerFactory"/>
      </properties>
   </persistence-unit>
    
</persistence>

chemix-ds.xml

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

<!DOCTYPE datasources
    PUBLIC "-//JBoss//DTD JBOSS JCA Config 1.5//EN"
    "http://www.jboss.org/j2ee/dtd/jboss-ds_1_5.dtd">
    
<datasources>
   
   <local-tx-datasource>
      <jndi-name>chemixDatasource</jndi-name>
      <connection-url>jdbc:mysql:///lrchemix</connection-url>
      <driver-class>com.mysql.jdbc.Driver</driver-class>
      <user-name>XXX</user-name>
      <password>XXX</password>
   </local-tx-datasource>
    
</datasources>

Thanks for any assistance.

[bolke]

something else that might be interesting is that if this error happens (the form is submitted by an ajax button) and I press the back-button the form is cleared and fully empty. This is normally not the case (when the form is submitted the current select ship stays).

[pmuir]

I think you'll have to grab the hibernate sources and use your debugger to get a  clearer picture of what is going on.