jakarta-ee - 通过远程 EJB 返回实体会导致 - com.sun.corba.ee.impl.orbutil.ClassInfoCache$ClassInfo 处的 java.lang.NullPointerException。

Question

我正在尝试在以下环境中创建企业 Web 应用程序。

NetBeans 7.2.1
Glassfish Server 3.1.2（包含 Servlet 3.0 API）
EJB 3.1
JPA 2.0
JSF 2.1
JDK 1.7
甲骨文 10g

我创建了一个类库（新项目 -> Java -> Java 类库）来放置javax.ejb.Remote将由无状态会话 bean 实现的远程（）接口。类库已添加到两个模块（EJB 和 WAR）的类路径中。

我已经把远程接口和所有的实体类都放在了类库中（不知道是这样的）。

这适用于带有注释的接口@Local。@Remote当我尝试返回实体的对象列表时，它甚至可以在 JPA 涉及时使用但失败并出现以下异常。

java.rmi.MarshalException: CORBA MARSHAL 1330446347 也许；嵌套异常是：org.omg.CORBA.MARSHAL：警告：IOP00810011：CDRInputStream vmcid 中 ValueHandler 上的 readValue 异常：OMG 次要代码：11 已完成：可能

完整的堆栈跟踪。

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

远程接口：

@Remote
public interface AdminRemoteSessionBeanRemote {
    public List<Zone>getZones();
    public int sum(int a, int b);
}

实现上述接口的无状态会话bean：

@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;
    }
}

JSF 托管 bean：

@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;
    }
}

sum()仅返回 an的方法int仅用于演示。它按原样工作。

当涉及到一个实体时，就会出现问题，这可以public List<Zone> getZones()在 EJB 中导致上述异常的方法中看到。

AdminClassLibrary（快照中突出显示的节点）是包含远程接口和实体类的类库。

如何java.util.List<entities.Zone>通过getZones()EJB 会话 bean 中的方法返回？

我已单击 Google 显示的有关此异常的所有链接，但无法找到解决方案。

Zone实体。

@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()
}

score 9 · Accepted Answer

问题在于Zone类实例的反序列化。它应该Serializable并且应该存在于客户端和服务器（本地和远程）上。这也将强加一个依赖关系以将持久性库添加到远程服务器。因此最好不要发送持久性实体。

score 1 · Accepted Answer

我刚刚遇到了这个问题的一个例子。我调用的远程方法引发了异常（实际上是 PSQLException）。我认为 PSQLException 被包装并最终序列化并发送给我的客户。我的客户在其类路径中没有 PSQLException，这在 CORBA 的内部似乎没有得到很好的处理。

我通过将调试器连接到客户端应用程序并在 NullPointerException 的构造函数上放置断点来诊断这一点。然后，我能够看到在抛出异常时正在反序列化哪个类。

祝你好运！

score 0 · Accepted Answer

在尝试从远程 ejb 调用中获取实体集合后，我也得到了错误堆栈跟踪。将jdk升级到1.8_60及以上完全解决了问题。它现在运行得很好，没有错误堆栈。此错误已得到处理

jakarta-ee - 通过远程 EJB 返回实体会导致 - com.sun.corba.ee.impl.orbutil.ClassInfoCache$ClassInfo 处的 java.lang.NullPointerException。

3 回答 3

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