JPA2一对多序列化异常

时间：2011-11-10 16:18:09

标签： hibernate glassfish ejb-3.0 jpa-2.0

在新的EJB项目中从Hibernate迁移到JPA2时出现了这样的问题。

在无状态bean中，我获取一个父类实例，其名称为ProductType，具有TypeItems的单向一对多关系。它完全从数据库中提取，我在服务器日志中看到它，但是当我从无状态bean方法返回ProductType实体时，客户端突然崩溃，异常。好。在第一次我制造这种关系，他们的每一部分成功地从服务器传递到客户端。我做了一个假的方法，产生了这样的结构，但没有从数据库中取出......它有效！

我真的不知道为什么从具有一对多关系的数据库实体中获取为什么会破坏我的系统。 BTW。我使用glassfish 3.1.1和hibernate 3.5.0作为持久性提供程序。

现在有点代码。我会跳过初学者和初学者。 这是父类：

@Entity
@Table(name = "product_types")
@XmlRootElement
public class ProductType implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "type_id")
    private Integer typeId;
    @Basic(optional = false)
    @Column(name = "type_name")
    private String typeName;

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    @JoinColumn(name="type_id")
    private Set<TypeItem> typeItems = new HashSet<TypeItem>();


    public Set<TypeItem> getTypeItems() {
        return typeItems;
    }


    public void setTypeItems(Set<TypeItem> items) {
        this.typeItems = new HashSet<TypeItem>(items);
    }
}

和TypeItem（坏名称顺便说一句）

@Entity
@Table(name = "types_list")
@XmlRootElement
public class TypeItem implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "id")
    private Integer id;
    @Basic(optional = false)
    @Column(name = "type_name")
    private String typeName;
    @Basic(optional = false)
    @Column(name = "type_translation")
    private String typeTranslation;
    @Basic(optional = false)
    @Column(name = "type_var")
    private String typeVar;
    @Basic(optional = false)
    @Column(name = "type_measure")
    private String typeMeasure;
    @Basic(optional = false)
    @Column(name = "type_id")
    private int typeId;

}

，例外是：

10.11.2011 21:52:45 com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator handleFullLogging
WARNING: IOP00810011: Exception from readValue on ValueHandler in CDRInputStream
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: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.presentation.rmi.DynamicMethodMarshallerImpl$14.read(DynamicMethodMarshallerImpl.java:384)
    at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl.readResult(DynamicMethodMarshallerImpl.java:483)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:203)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:152)
    at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:227)
    at hameleon.session.productmanagement.__ProductTypeManagerRemote_Remote_DynamicStub.getProductType(hameleon/session/productmanagement/__ProductTypeManagerRemote_Remote_DynamicStub.java)
    at hameleon.session.productmanagement._ProductTypeManagerRemote_Wrapper.getProductType(hameleon/session/productmanagement/_ProductTypeManagerRemote_Wrapper.java)
    at hameleonclient.HameleonClient.main(HameleonClient.java:34)
Caused by: java.lang.NullPointerException
    at com.sun.corba.ee.impl.orbutil.ClassInfoCache$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)
    ... 10 more
Exception in thread "main" 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 hameleon.session.productmanagement._ProductTypeManagerRemote_Wrapper.getProductType(hameleon/session/productmanagement/_ProductTypeManagerRemote_Wrapper.java)
    at hameleonclient.HameleonClient.main(HameleonClient.java:34)
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.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:213)
    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 hameleon.session.productmanagement.__ProductTypeManagerRemote_Remote_DynamicStub.getProductType(hameleon/session/productmanagement/__ProductTypeManagerRemote_Remote_DynamicStub.java)
    ... 2 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: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.presentation.rmi.DynamicMethodMarshallerImpl$14.read(DynamicMethodMarshallerImpl.java:384)
    at com.sun.corba.ee.impl.presentation.rmi.DynamicMethodMarshallerImpl.readResult(DynamicMethodMarshallerImpl.java:483)
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:203)
    ... 5 more
Caused by: java.lang.NullPointerException
    at com.sun.corba.ee.impl.orbutil.ClassInfoCache$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.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)
    ... 10 more
Java Result: 1

UPD。我继续研究并通过属性将entityManager.find（）返回的对象复制到新的对象属性中。它的工作原理！是bug还是我的个人误解了J2EE？

抱歉英文不好。

1 个答案:

答案 0 :(得分：1)

我使用Hibernate得到完全相同的错误，这在JPA2中可能类似。

问题在于我的远程客户端没有包含必要的hibernate库，这是必要的，因为hibernate内部将像Set，Bag这样的实体的属性转换为自己的对应部分，如PersistentSet。

还有一点要从远程传递的实体中删除hibernate，因为我的远程客户端根本不需要知道hibernate！

搜索了两天后，我在这个论坛中找到了它： http://www.guj.com.br/java/251468-resolvido-problema-em-ejb-ao-retornar-objeto-recuperado-do-banco

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