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POReturning an entity via remote EJB results in - java.lang.NullPointerException at com.sun.corba.ee.impl.orbutil.ClassInfoCache$ClassInfo.<init>
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I'm trying to create an enterprise web application in the following environment. <ul> <li>NetBeans 7.2.1</li> <li>Glassfish Server 3.1.2 (containing the Servlet 3.0 API)</li> <li>EJB 3.1</li> <li>JPA 2.0</li> <li>JSF 2.1</li> <li>jdk 1.7</li> <li>Oracle 10g</li> </ul> I have created a Class Library (New Project -> Java -> Java Class Library) to place remote (<code>javax.ejb.Remote</code>) interface(s) which is to be implemented by a stateless session bean. The Class Library has been added to the class path of both of the modules (EJB and WAR). I have placed the remote interface and all the entity classes in the Class Library (I don't know this is the way). This works fine with interfaces annotated with <code>@Local</code>. It even works with <code>@Remote</code> but fails with the following exception when JPA involves, when I try to return a list of objects of an entity. <blockquote> java.rmi.MarshalException: CORBA MARSHAL 1330446347 Maybe; nested exception is: org.omg.CORBA.MARSHAL: WARNING: IOP00810011: Exception from readValue on ValueHandler in CDRInputStream vmcid: OMG minor code: 11 completed: Maybe </blockquote> The full stacktrace. <pre><code>javax.ejb.EJBException: java.rmi.MarshalException: CORBA MARSHAL 1330446347 Maybe; nested exception is: org.omg.CORBA.MARSHAL: WARNING: IOP00810011: Exception from readValue on ValueHandler in CDRInputStream vmcid: OMG minor code: 11 completed: Maybe at remote.admin.sessionbeans._AdminRemoteSessionBeanRemote_Wrapper.getZones(remote/admin/sessionbeans/_AdminRemoteSessionBeanRemote_Wrapper.java) at managedbeans.ZoneBean.getZones(ZoneBean.java:27) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at javax.el.BeanELResolver.getValue(BeanELResolver.java:363) at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176) at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203) at com.sun.el.parser.AstValue.getValue(AstValue.java:138) at com.sun.el.parser.AstValue.getValue(AstValue.java:183) at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:224) at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109) at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194) at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182) at javax.faces.component.UIData.getValue(UIData.java:731) at javax.faces.component.UIData.getDataModel(UIData.java:1798) at javax.faces.component.UIData.setRowIndexWithoutRowStatePreserved(UIData.java:484) at javax.faces.component.UIData.setRowIndex(UIData.java:473) at com.sun.faces.renderkit.html_basic.TableRenderer.encodeBegin(TableRenderer.java:81) at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:820) at javax.faces.component.UIData.encodeBegin(UIData.java:1118) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1755) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760) at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760) at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:402) at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:722) Caused by: java.rmi.MarshalException: CORBA MARSHAL 1330446347 Maybe; nested exception is: org.omg.CORBA.MARSHAL: WARNING: IOP00810011: Exception from readValue on ValueHandler in CDRInputStream vmcid: OMG minor code: 11 completed: Maybe at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:267) at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.wrapException(Util.java:696) at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:259) at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:152) at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:227) at remote.admin.sessionbeans.__AdminRemoteSessionBeanRemote_Remote_DynamicStub.getZones(remote/admin/sessionbeans/__AdminRemoteSessionBeanRemote_Remote_DynamicStub.java) ... 55 more Caused by: org.omg.CORBA.MARSHAL: WARNING: IOP00810011: Exception from readValue on ValueHandler in CDRInputStream vmcid: OMG minor code: 11 completed: Maybe at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at com.sun.corba.ee.spi.orbutil.logex.corba.CorbaExtension.makeException(CorbaExtension.java:248) at com.sun.corba.ee.spi.orbutil.logex.corba.CorbaExtension.makeException(CorbaExtension.java:95) at com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator.handleFullLogging(WrapperGenerator.java:387) at com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator.access$400(WrapperGenerator.java:107) at com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator$2.invoke(WrapperGenerator.java:511) at com.sun.corba.ee.spi.orbutil.proxy.CompositeInvocationHandlerImpl.invoke(CompositeInvocationHandlerImpl.java:99) at $Proxy193.valuehandlerReadException(Unknown Source) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.readRMIIIOPValueType(CDRInputStream_1_0.java:1022) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1123) at com.sun.corba.ee.impl.encoding.CDRInputObject.read_value(CDRInputObject.java:531) at com.sun.corba.ee.impl.io.IIOPInputStream.inputObjectField(IIOPInputStream.java:2162) at com.sun.corba.ee.impl.io.IIOPInputStream.inputClassFields(IIOPInputStream.java:2404) at com.sun.corba.ee.impl.io.IIOPInputStream.inputObject(IIOPInputStream.java:1224) at com.sun.corba.ee.impl.io.IIOPInputStream.simpleReadObject(IIOPInputStream.java:425) at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValueInternal(ValueHandlerImpl.java:308) at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValue(ValueHandlerImpl.java:274) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.readRMIIIOPValueType(CDRInputStream_1_0.java:1015) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1123) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:935) at com.sun.corba.ee.impl.encoding.CDRInputObject.read_value(CDRInputObject.java:525) at com.sun.corba.ee.impl.copyobject.ORBStreamObjectCopierImpl.copy(ORBStreamObjectCopierImpl.java:78) at com.sun.corba.ee.impl.copyobject.ORBStreamObjectCopierImpl.copy(ORBStreamObjectCopierImpl.java:65) at com.sun.corba.ee.impl.orbutil.copyobject.FallbackObjectCopierImpl.copy(FallbackObjectCopierImpl.java:69) at com.sun.corba.ee.impl.orbutil.copyobject.FallbackObjectCopierImpl.copy(FallbackObjectCopierImpl.java:59) at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.copyObject(Util.java:771) at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl.copyResult(DynamicMethodMarshallerImpl.java:473) at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:243) ... 58 more Caused by: java.lang.NullPointerException at com.sun.corba.ee.impl.orbutil.ClassInfoCache$ClassInfo.<init>(ClassInfoCache.java:156) at com.sun.corba.ee.impl.orbutil.ClassInfoCache.get(ClassInfoCache.java:281) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1097) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:935) at com.sun.corba.ee.impl.encoding.CDRInputObject.read_value(CDRInputObject.java:525) at com.sun.corba.ee.impl.corba.TCUtility.unmarshalIn(TCUtility.java:289) at com.sun.corba.ee.impl.corba.AnyImpl.read_value(AnyImpl.java:605) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_any(CDRInputStream_1_0.java:775) at com.sun.corba.ee.impl.encoding.CDRInputObject.read_any(CDRInputObject.java:482) at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.readAny(Util.java:452) at com.sun.corba.ee.impl.io.ValueHandlerImpl.read_Array(ValueHandlerImpl.java:639) at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValueInternal(ValueHandlerImpl.java:305) at com.sun.corba.ee.impl.io.ValueHandlerImpl.readValue(ValueHandlerImpl.java:274) at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.readRMIIIOPValueType(CDRInputStream_1_0.java:1015) ... 77 more </code></pre> <hr> The remote interface: <pre><code>@Remote public interface AdminRemoteSessionBeanRemote { public List<Zone>getZones(); public int sum(int a, int b); } </code></pre> The stateless session bean implementing the above interface: <pre><code>@Stateless public class AdminRemoteSessionBean implements AdminRemoteSessionBeanRemote { @PersistenceContext(unitName="unit-name") private EntityManager entityManager; @Override public List<Zone> getZones() { return entityManager.createNamedQuery("Zone.findAll").getResultList(); } @Override public int sum(int a, int b) { return a + b; } } </code></pre> The JSF managed bean: <pre><code>@ManagedBean @RequestScoped public class ZoneBean { @EJB//(mappedName="remote.admin.sessionbeans.AdminRemoteSessionBeanRemote") private AdminRemoteSessionBeanRemote adminRemoteSessionBeanRemote; private List<Zone>zones; private int sum; public ZoneBean(){} public List<Zone> getZones() { zones=adminRemoteSessionBeanRemote.getZones(); return zones; } public void setZones(List<Zone> zones) { this.zones = zones; } public int getSum() { sum=adminRemoteSessionBeanRemote.sum(10, 15); return sum; } public void setSum(int sum) { this.sum = sum; } } </code></pre> The <code>sum()</code> method which just returns an <code>int</code> is just for demonstration. It works as it is. The problem occurs when an entity is involved as can be seen in the <code>public List<Zone> getZones()</code> method in the EJB that causes the exception as mentioned above. <a href="https://i.stack.imgur.com/cMNK3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cMNK3.png" alt="enter image description here"></a> <code>AdminClassLibrary</code> (the highlighted node in the <a href="https://i.stack.imgur.com/qbgpi.png" rel="nofollow noreferrer">snapshot</a>) is the Class Library containing the remote interface and entity classes. How to return <code>java.util.List<entities.Zone></code> via the <code>getZones()</code> method in the EJB session bean? I have clicked all the links shown by Google about this exception but couldn't come across the solution. <hr> The <code>Zone</code> entity. <pre><code>@Entity @Table(name = "ZONE", catalog = "", schema = "PROJECTDB") @XmlRootElement @NamedQueries({ @NamedQuery(name = "Zone.findAll", query = "SELECT z FROM Zone z ORDER BY z.zoneId DESC"), @NamedQuery(name = "Zone.findByZoneId", query = "SELECT z FROM Zone z WHERE z.zoneId = :zoneId"), @NamedQuery(name = "Zone.findByZone", query = "SELECT z FROM Zone z WHERE z.zone = :zone")}) public class Zone implements Serializable { private static final long serialVersionUID = 1L; // @Max(value=?) @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation @Id @Basic(optional = false) @NotNull @Column(name = "ZONE_ID") private BigDecimal zoneId; @Size(max = 50) @Column(name = "ZONE") private String zone; @OneToMany(mappedBy = "zoneId", fetch = FetchType.LAZY) private List<Country> countryList; @OneToMany(cascade = CascadeType.ALL, mappedBy = "zone", fetch = FetchType.LAZY) private List<ZoneCharge> zoneChargeList; @JoinColumn(name = "TRANSPORTER_ID", referencedColumnName = "TRANSPORTER_ID") @ManyToOne(fetch = FetchType.LAZY) private Transporter transporterId; //Getters and setters + constructor(s) + equals() + hashcode() } </code></pre>
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Returning an entity via remote EJB results in - java.lang.NullPointerException at com.sun.corba.ee.impl.orbutil.ClassInfoCache$ClassInfo.<init>
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1. COCould you post the `Zone` class also?
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2. CO@Carlo Pellegrini - Given that class. Thanks.
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