Java：为什么我的对象实例有两个serialVersionUID？

时间：2012-11-29 19:29:45

标签： java serialization jpa glassfish-3 serialversionuid

我正在使用Glassfish 3.1.2.2，eclipse-link作为JPA提供程序和Java JDK-6u31。我的应用程序是在客户端计算机上运行在自己的JVM上的独立Swing客户端的3层。通过JNDI查找和@Remote接口与EJB通信。

我有以下对象继承结构：

我的超级班“文件”：

@Entity
@Table(name = "Document")
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
public class Document implements IUpdateableEntity {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE)
    private Long id;

    @Basic(optional=false, fetch=FetchType.LAZY)
    @Lob
    private byte[] content;

    @Transient
    private transient File file;

    public Document() { }

    // getters and setters ...

}

...和子类“发票”：

@Entity
@Table(name = "Dokument")
public class Invoice extends Document implements IUpdateableEntity {

    private static final long serialVersionUID = 1L;

    // some additional relations and attributes ...

    public Invoice () { }

    // getters and setters ...

}

现在我在调用我的ejb facade时遇到此异常，以便持久保存发票对象（调用persist（），flush（），refresh（）并将对象返回给客户端，以便为客户端提供自动生成ID）：

29.11.2012 20:21:25 com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator handleFullLogging
WARNUNG: IOP00810011: Exception from readValue on ValueHandler in CDRInputStream
org.omg.CORBA.MARSHAL: WARNUNG: IOP00810011: Exception from readValue on ValueHandler in CDRInputStream  vmcid: OMG  minor code: 11 completed: Maybe

我已经通过互联网进行了梳理，并发现指向serialVersionUID问题的提示，因为在此示例中CORBA编组明显失败。

然后我在Netbeans IDE中启用了我的调试器，并在将对象发送到服务器端ejb bean之前对其进行了内省。

我意识到在调试器窗口中打开静态字段节点时有一个重复的serialVersionUID（与下图相比）：

enter image description here

- 有人知道如何解决这个问题吗？

我的项目中有其他类似的继承结构构造非常相似（没有@Lob）我没有这个问题... @Lob字段可能会以某种方式引发这种行为吗？

任何帮助高度赞赏＆amp;提前谢谢你！

编辑：这是完整的堆栈跟踪：

29.11.2012 20:21:25 com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator handleFullLogging
WARNUNG: IOP00810011: Exception from readValue on ValueHandler in CDRInputStream
org.omg.CORBA.MARSHAL: WARNUNG: 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:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    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 $Proxy24.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.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.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.CDRInputObject.read_value(CDRInputObject.java:531)
    at com.sun.corba.ee.impl.presentation.rmi.ExceptionHandlerImpl$ExceptionRWRMIImpl.read(ExceptionHandlerImpl.java:180)
    at com.sun.corba.ee.impl.presentation.rmi.ExceptionHandlerImpl.readException(ExceptionHandlerImpl.java:290)
    at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl.readException(DynamicMethodMarshallerImpl.java:502)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:205)
    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 ch.lawsuite.control.__DokumentFacadeRemote_Remote_DynamicStub.create(ch/lawsuite/control/__DokumentFacadeRemote_Remote_DynamicStub.java)
    at ch.lawsuite.control._DokumentFacadeRemote_Wrapper.create(ch/lawsuite/control/_DokumentFacadeRemote_Wrapper.java)
    at ch.lawsuite.gui.misc.unterlagen.ModDocumentUI.btnSpeichernActionPerformed(ModDocumentUI.java:631)
    at ch.lawsuite.gui.misc.unterlagen.ModDocumentUI.access$300(ModDocumentUI.java:52)
    at ch.lawsuite.gui.misc.unterlagen.ModDocumentUI$6.actionPerformed(ModDocumentUI.java:384)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
    at java.awt.Component.processMouseEvent(Component.java:6290)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
    at java.awt.Component.processEvent(Component.java:6055)
    at java.awt.Container.processEvent(Container.java:2039)
    at java.awt.Component.dispatchEventImpl(Component.java:4653)
    at java.awt.Container.dispatchEventImpl(Container.java:2097)
    at java.awt.Component.dispatchEvent(Component.java:4481)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)
    at java.awt.Container.dispatchEventImpl(Container.java:2083)
    at java.awt.Window.dispatchEventImpl(Window.java:2482)
    at java.awt.Component.dispatchEvent(Component.java:4481)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
    at java.awt.EventQueue.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:607)
    at java.awt.EventQueue$1.run(EventQueue.java:605)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$2.run(EventQueue.java:621)
    at java.awt.EventQueue$2.run(EventQueue.java:619)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
    at java.awt.Dialog$1.run(Dialog.java:1044)
    at java.awt.Dialog$3.run(Dialog.java:1096)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.awt.Dialog.show(Dialog.java:1094)
    at java.awt.Component.show(Component.java:1584)
    at java.awt.Component.setVisible(Component.java:1536)
    at java.awt.Window.setVisible(Window.java:841)
    at java.awt.Dialog.setVisible(Dialog.java:984)
    at ch.lawsuite.gui.misc.unterlagen.ModDocumentUI.showFrame(ModDocumentUI.java:118)
    at ch.lawsuite.gui.dateneinheit.akte.AkteUI.btnImportFestplatteActionPerformed(AkteUI.java:5877)
    at ch.lawsuite.gui.dateneinheit.akte.AkteUI.access$3300(AkteUI.java:75)
    at ch.lawsuite.gui.dateneinheit.akte.AkteUI$126.actionPerformed(AkteUI.java:4170)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
    at java.awt.Component.processMouseEvent(Component.java:6290)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
    at java.awt.Component.processEvent(Component.java:6055)
    at java.awt.Container.processEvent(Container.java:2039)
    at java.awt.Component.dispatchEventImpl(Component.java:4653)
    at java.awt.Container.dispatchEventImpl(Container.java:2097)
    at java.awt.Component.dispatchEvent(Component.java:4481)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)
    at java.awt.Container.dispatchEventImpl(Container.java:2083)
    at java.awt.Window.dispatchEventImpl(Window.java:2482)
    at java.awt.Component.dispatchEvent(Component.java:4481)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
    at java.awt.EventQueue.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:607)
    at java.awt.EventQueue$1.run(EventQueue.java:605)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$2.run(EventQueue.java:621)
    at java.awt.EventQueue$2.run(EventQueue.java:619)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.NullPointerException
    at com.sun.corba.ee.impl.orbutil.ClassInfoCache$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.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)
    ... 121 more

1 个答案:

答案 0 :(得分：1)

static个字段属于该类。您有一个发票实例，它既是发票又是凭证。因此，有两个名为serialVersionUID的静态字段相关，Document.serialVersionUID和Invoice.serialVersionUID。在正常使用中，您只会看到顶部的一个，因为超类被掩盖了。这是因为它们是private，因此禁止子类访问。调试器不受可见性规则的约束，显然会向您显示两者。

这似乎是正常的，没有任何其他证据，可能不是你问题的原因。

您可以通过将其中一个值更改为不同（例如2）来仔细检查，然后您应该更清楚地看到调试器中的不同值。

相关问题
最新问题