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Bug 334807

Summary: NPE when using LAZY loading on ManyToOne relationship
Product: z_Archived Reporter: Daniel Le Berre <leberre>
Component: EclipselinkAssignee: Nobody - feel free to take it <nobody>
Status: CLOSED INVALID QA Contact:
Severity: normal    
Priority: P3 CC: christopher.delahunt
Version: unspecified   
Target Milestone: ---   
Hardware: PC   
OS: Linux   
Whiteboard:
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Description Flags
Test Case showing the bug none

Description Daniel Le Berre CLA 2011-01-19 11:21:49 EST 
[See also bug description in the forum: http://www.eclipse.org/forums/index.php?t=rview&th=203118]

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 use static weaving declared in my persistence.xml file.
Comment 1 Daniel Le Berre CLA 2011-01-20 11:58:02 EST 
Created attachment 187212 [details]
Test Case showing the bug

Please find enclosed a test case showing the problem.

I removed from the archive derby.jar, eclipselink.jar (2.1.2) and javax.persistence.2.0.1.jar. You will need to use your own copy of eclipselink and your own DB and change accordingly the persistence.xml file.

If the     

@ManyToOne(fetch = FetchType.LAZY) 

annotatation class B is changed into 

@ManyToOne(fetch = FetchType.EAGER)

the test pass.
Comment 2 Chris Delahunt CLA 2011-01-20 16:53:20 EST 
Problem is that the test is using the "eclipselink.weaving" proprety with a value="static" in the persistence.xml, but has not run the static weaver on the compiled classes.  The eclipselink.weaving = static tells EclipseLink that weaving has been performed already, which causes a problem when it tries to use the _persistence_get_a_vh to access the valueholder for a lazy relationship. 


Please see http://wiki.eclipse.org/Using_EclipseLink_JPA_Extensions_(ELUG)#Using_EclipseLink_JPA_Weaving
for the options available for weaving which is required for lazy OneToOne and ManyToOne relationships.
Comment 3 Eclipse Webmaster CLA 2022-06-09 10:14:43 EDT 
The Eclipselink project has moved to Github: https://github.com/eclipse-ee4j/eclipselink
Comment 4 Eclipse Webmaster CLA 2022-06-09 10:25:38 EDT 
The Eclipselink project has moved to Github: https://github.com/eclipse-ee4j/eclipselink