EntityNotFoundException with JPA - jpa

Question

I developing an application using Standard JPA and db2 and I faced the following :
I have the following classes structure:
The Parent class:
#Entity
#Inheritance(strategy=InheritanceType.SINGLE_TABLE)
#DiscriminatorColumn(name="TYPE")
#DiscriminatorValue(value="PARTY")
public class Party extends AbstractAuditableObject implements Serializable {
}
The Child Class:
#Entity
#DiscriminatorValue(value="PERSON")
public class Person extends Party implements Serializable {
}
And I create a Party of type Person and saved it and then while updating it i got the following exception:
org.apache.openjpa.persistence.EntityNotFoundException: Attempted to attach instance "12" of type "class com.ibm.sa.Party.domain.Party", but this instance is already in the datastore as type "class com.ibm.sa.kap.Shape.model.Person".
at org.apache.openjpa.kernel.VersionAttachStrategy.attach(VersionAttachStrategy.java:118) ~[com.ibm.ws.jpa.jar:1.0.1-SNAPSHOT]
at org.apache.openjpa.kernel.AttachManager.attach(AttachManager.java:251) ~[com.ibm.ws.jpa.jar:1.0.1-SNAPSHOT]
at org.apache.openjpa.kernel.AttachManager.attach(AttachManager.java:104) ~[com.ibm.ws.jpa.jar:1.0.1-SNAPSHOT]
at org.apache.openjpa.kernel.BrokerImpl.attach(BrokerImpl.java:3447) ~[com.ibm.ws.jpa.jar:1.0.1-SNAPSHOT]
at org.apache.openjpa.kernel.DelegatingBroker.attach(DelegatingBroker.java:1214) ~[com.ibm.ws.jpa.jar:1.0.1-SNAPSHOT]
at org.apache.openjpa.persistence.EntityManagerImpl.merge(EntityManagerImpl.java:877) ~[com.ibm.ws.jpa.jar:1.0.1-SNAPSHOT]
at com.ibm.ws.jpa.management.JPAExEmInvocation.merge(JPAExEmInvocation.java:305) ~[com.ibm.ws.runtime.jar:na]
at com.ibm.ws.jpa.management.JPAEntityManager.merge(JPAEntityManager.java:156) ~[com.ibm.ws.runtime.jar:na]
at com.ibm.sa.kap.dao.PartyDAO.updateParty(PartyDAO.java:56) ~[KAPDataAccess.jar:na]
at com.ibm.sa.kap.domain.party.EJSLocal1SLPartyDAO_b691ea75.updateParty(EJSLocal1SLPartyDAO_b691ea75.java) [na:na]
at com.ibm.sa.kap.domain.party.EditPartyService.updateParty(EditPartyService.java:45) [KAPDomain.jar:na]
at com.ibm.sa.kap.domain.party.EJSLocal1SLEditPartyService_8f3f6222.updateParty(EJSLocal1SLEditPartyService_8f3f6222.java) [na:na]
at com.ibm.sa.kap.application.bean.EditPartyApplication.updateParty(EditPartyApplication.java:72) [KAPApplication.jar:na]
at com.ibm.sa.kap.application.client.EJSLocal1SLEditPartyApplication_aa9d77c4.updateParty(EJSLocal1SLEditPartyApplication_aa9d77c4.java) [na:na]
at com.ibm.sa.kap.ui.controller.CreatePartyController.save(CreatePartyController.java:385) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48) ~[na:1.6.0]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0]
at java.lang.reflect.Method.invoke(Method.java:600) ~[na:1.6.0]
at org.apache.el.parser.AstValue.invoke(AstValue.java:268) [com.ibm.ws.webcontainer.jar:na]
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278) [com.ibm.ws.webcontainer.jar:na]
at org.apache.myfaces.view.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:83) [com.ibm.ws.jsf.myfaces.jar:na]
at javax.faces.component._MethodExpressionToMethodBinding.invoke(_MethodExpressionToMethodBinding.java:88) [javax.j2ee.jsf.jar:na]
at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:100) [com.ibm.ws.jsf.myfaces.jar:na]
at javax.faces.component.UICommand.broadcast(UICommand.java:120) [javax.j2ee.jsf.jar:na]
at javax.faces.component.UIViewRoot._broadcastAll(UIViewRoot.java:973) [javax.j2ee.jsf.jar:na]
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:275) [javax.j2ee.jsf.jar:na]
at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1285) [javax.j2ee.jsf.jar:na]
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:711) [javax.j2ee.jsf.jar:na]
at org.apache.myfaces.lifecycle.InvokeApplicationExecutor.execute(InvokeApplicationExecutor.java:34) [com.ibm.ws.jsf.myfaces.jar:na]
at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:171) [com.ibm.ws.jsf.myfaces.jar:na]
at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [com.ibm.ws.jsf.myfaces.jar:na]
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:189) [javax.j2ee.jsf.jar:na]
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1225) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:775) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:457) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:136) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:97) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.sa.kap.common.web.filter.CustomHeadersFilter.doFilter(CustomHeadersFilter.java:24) [KAPCommon.jar:na]
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.sa.kap.ui.attachment.filter.WebSphereFileUploadFilter.doFilter(WebSphereFileUploadFilter.java:87) [classes/:na]
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:928) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1025) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:908) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:195) [com.ibm.ws.webcontainer.jar:na]
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:453) [com.ibm.ws.runtime.jar:na]
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:515) [com.ibm.ws.runtime.jar:na]
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:306) [com.ibm.ws.runtime.jar:na]
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:277) [com.ibm.ws.runtime.jar:na]
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214) [na:CCX.CF [o1103.02]]
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113) [na:CCX.CF [o1103.02]]
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:166) [com.ibm.ws.runtime.jar:na]
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) [com.ibm.ws.runtime.jar:na]
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161) [com.ibm.ws.runtime.jar:na]
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138) [com.ibm.ws.runtime.jar:na]
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204) [com.ibm.ws.runtime.jar:na]
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775) [com.ibm.ws.runtime.jar:na]
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905) [com.ibm.ws.runtime.jar:na]
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1691) [com.ibm.ws.runtime.jar:na]
P.S.: The scenario is working fine if creating a Party of type Party.
Could you please advice how to solve this problem?
Thanks in advance

Answer 1

How are you assigning Ids? From the error sounds to me that you are trying to persist an object with an id that already exists. In that case make sure you use the merge method if you are updating, or double check how you are generating your ids, and avoid setting a different strategy on the subclass (would really help to see the whole code for your classes).