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Home » Eclipse Projects » EclipseLink » [Fixed] NPE when using LAZY loading on ManyToOne relationship
[Fixed] NPE when using LAZY loading on ManyToOne relationship [message #649113] Mon, 17 January 2011 12:55 Go to previous message
Daniel Le Berre is currently offline Daniel Le Berre
Messages: 82
Registered: July 2009
Member
I got the following entities:
@Entity
public class A implements Serializable {

    @Id
    @GeneratedValue
    private long id;

    private String value;

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

}


and
@Entity
public class B implements Serializable {

    @Id
    @GeneratedValue
    private long id;

    @ManyToOne(fetch = FetchType.LAZY)
    private A a;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public A getA() {
        return a;
    }

    public void setA(A a) {
        this.a = a;
    }

}


When I deploy those entities, I got the following error:
Local Exception Stack: 
Exception [EclipseLink-60] (Eclipse Persistence Services - 2.1.2.v20101206-r8635): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The method [_persistence_set_a_vh] or [_persistence_get_a_vh] is not defined in the object [ili.ili4.entities.B].
Internal Exception: java.lang.NoSuchMethodException: ili.ili4.entities.B._persistence_get_a_vh()
Mapping: org.eclipse.persistence.mappings.ManyToOneMapping[a]
Descriptor: RelationalDescriptor(ili.ili4.entities.B --> [DatabaseTable(B)])
	at org.eclipse.persistence.exceptions.DescriptorException.noSuchMethodWhileInitializingAttributesInMethodAccessor(DescriptorException.java:1154)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.initializeAttributes(MethodAttributeAccessor.java:175)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.initializeAttributes(MethodAttributeAccessor.java:156)
	at org.eclipse.persistence.mappings.DatabaseMapping.preInitialize(DatabaseMapping.java:1241)
	at org.eclipse.persistence.mappings.ForeignReferenceMapping.preInitialize(ForeignReferenceMapping.java:1004)
	at org.eclipse.persistence.mappings.ObjectReferenceMapping.preInitialize(ObjectReferenceMapping.java:925)
	at org.eclipse.persistence.descriptors.ClassDescriptor.preInitialize(ClassDescriptor.java:3360)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:429)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:406)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:666)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:615)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:228)
	at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:389)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:164)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:221)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:209)
	at ili.ili4.tests.ConsultationTest.setUp(ConsultationTest.java:31)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.NoSuchMethodException: ili.ili4.entities.B._persistence_get_a_vh()
	at java.lang.Class.getDeclaredMethod(Class.java:1937)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.findMethod(PrivilegedAccessHelper.java:61)
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.getMethod(PrivilegedAccessHelper.java:252)
	at org.eclipse.persistence.internal.helper.Helper.getDeclaredMethod(Helper.java:1055)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.initializeAttributes(MethodAttributeAccessor.java:168)
	... 38 more

Runtime Exceptions: 
---------------------------------------------------------


java.lang.NullPointerException
	at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.getMethodReturnType(PrivilegedAccessHelper.java:326)
	at org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getGetMethodReturnType(MethodAttributeAccessor.java:112)
	at org.eclipse.persistence.mappings.ForeignReferenceMapping.validateBeforeInitialization(ForeignReferenceMapping.java:1709)
	at org.eclipse.persistence.descriptors.ClassDescriptor.validateBeforeInitialization(ClassDescriptor.java:5310)
	at org.eclipse.persistence.descriptors.ClassDescriptor.preInitialize(ClassDescriptor.java:3366)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:429)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:406)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:666)
	at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:615)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:228)
	at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:389)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:164)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:221)
	at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:209)
	at ili.ili4.tests.ConsultationTest.setUp(ConsultationTest.java:31)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)


I an not sure if it is a bug in EclipseLink or if I made a mistake in my entities declarations.

[Updated on: Thu, 20 January 2011 17:29]

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