[Hibernate-JIRA] Updated: (HHH-1365) NPE AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:372) when trying to load a class defined in a signed/sealed JAR
9:34 a.m.
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http://opensource.atlassian.com/projects/hibernate/browse/HHH-1365?page=c...
]
David Cox updated HHH-1365:
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Attachment: hibernate-hack.jar
I've had this problem several times over the years. The problem was the that the
generated proxy classes ended up in the same package as signed classes which they are
proxying. You can change this in CGLIB using a custom naming policy to make the proxy
classes in a different package. The problem is that setting that is not very easy. My
first hack was to actually tweak the CGLIBLazyInitializer hibernate class. That was
distasteful in that I had to replace the class file in the jar. This second solution seems
to be better. I made copies of the CBLIBLazyInitializer and CGLIBProxyFactory, calling
them SignSafe***. I then subclassed PojoTuplizer which uses the CGLIB-hibernate classes.
Instead my SignSafeTuplizer uses the SignSafe proxy classes. You just package these with
your app and configure your class to use the custom tuplizer (see attached
Customer.java).
I hope this prevents anybody else from going through this again. The only potential
downside of this solution is if there is a java package access restriction in the original
class because the proxy will be in a different package.
NPE
AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:372) when trying to load a
class defined in a signed/sealed JAR
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Key: HHH-1365
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1365
Project: Hibernate3
Issue Type: Bug
Affects Versions: 3.1
Environment: Java1.5.06 Ant1.7alpha, hibernate 3.1
Reporter: Steve Loughran
Priority: Minor
Attachments: cglib-src-2.1_3.patch, hibernate-hack.jar
I'm testing what happens to hibernate when running against a signed JAR. The answer
is: most tests pass. What fails is this test (Apache 2.0 license, BTW)
public void testDetachedObject() throws Exception {
Event event = createTestEvent();
session.save(event);
session.flush();
closeSession();
//here the event is detached.
//we change it outside an operation.
String text = "modified";
event.setText(text);
session = getSessionFactory().openSession();
Event merged=(Event) session.merge(event);
assertEquals(event, merged);
session.flush();
closeSession();
session = getSessionFactory().openSession();
Event loaded = (Event) session.load(Event.class, event.getKey());
assertEquals(text, loaded.getText());
assertEquals(event, loaded);
}
the session.load operation is failing, with the short stack trace of:
java.lang.NullPointerException
at
org.hibernate.tuple.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:372)
at
org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:3121)
at
org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:232)
at
org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:173)
at
org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:869)
at org.hibernate.impl.SessionImpl.load(SessionImpl.java:788)
at org.hibernate.impl.SessionImpl.load(SessionImpl.java:781)
at d1.persist.test.SessionTest.testDetachedObject(SessionTest.java:155)
The root cause is probably contained in the info that gets printed when the session
starts up, complaining that things cant be added to sealed classes
[junit] 2261 ERROR org.hibernate.proxy.BasicLazyInitializer - CGLIB Enhancement
failed: d1.persist.Event
[junit] net.sf.cglib.core.CodeGenerationException:
java.lang.reflect.InvocationTargetException-->null
[junit] at
net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:237)
[junit] at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
[junit] at net.sf.cglib.proxy.Enhancer.createClass(Enhancer.java:317)
[junit] at
org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:126)
[junit] at
org.hibernate.proxy.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:41)
[junit] at
org.hibernate.tuple.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:161)
[junit] at
org.hibernate.tuple.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:131)
[junit] at
org.hibernate.tuple.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
[junit] at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:64)
[junit] at
org.hibernate.tuple.EntityMetamodel.<init>(EntityMetamodel.java:257)
[junit] at
org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:412)
[junit] at
org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:108)
[junit] at
org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
[junit] at
org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:215)
[junit] at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1154)
[junit] at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:375)
[junit] at
org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:533)
[junit] at
org.hibernate.ejb.Ejb3Configuration.createFactory(Ejb3Configuration.java:109)
[junit] at
org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:155)
[junit] at
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:82)
[junit] at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:37)
[junit] at d1.persist.PersistTools.createManagerFactory(PersistTools.java:82)
[junit] at
d1.persist.PersistTools.createDefaultManagerFactory(PersistTools.java:76)
[junit] at d1.persist.test.Ejb3TestBase.setUp(Ejb3TestBase.java:27)
[junit] at junit.framework.TestCase.runBare(TestCase.java:125)
[junit] at junit.framework.TestResult$1.protect(TestResult.java:106)
[junit] at junit.framework.TestResult.runProtected(TestResult.java:124)
[junit] at junit.framework.TestResult.run(TestResult.java:109)
[junit] at junit.framework.TestCase.run(TestCase.java:118)
[junit] at junit.framework.TestSuite.runTest(TestSuite.java:208)
[junit] at junit.framework.TestSuite.run(TestSuite.java:203)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:328)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:736)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:605)
[junit] Caused by: java.lang.reflect.InvocationTargetException
[junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[junit] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[junit] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[junit] at java.lang.reflect.Method.invoke(Method.java:585)
[junit] at net.sf.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:384)
[junit] at
net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:219)
[junit] ... 33 more
[junit] Caused by: java.lang.SecurityException: class
"d1.persist.Event$$EnhancerByCGLIB$$55c8eae8_2"'s signer information does
not match signer information of other classes in the same package
[junit] at java.lang.ClassLoader.checkCerts(ClassLoader.java:775)
[junit] at java.lang.ClassLoader.preDefineClass(ClassLoader.java:487)
[junit] at java.lang.ClassLoader.defineClass(ClassLoader.java:614)
[junit] ... 39 more
[junit] 2262 WARN org.hibernate.tuple.PojoEntityTuplizer - could not create proxy
factory for:d1.persist.Event
[junit] org.hibernate.HibernateException: CGLIB Enhancement failed: d1.persist.Event
[junit] at
org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:132)
[junit] at
org.hibernate.proxy.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:41)
[junit] at
org.hibernate.tuple.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:161)
[junit] at
org.hibernate.tuple.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:131)
[junit] at
org.hibernate.tuple.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
[junit] at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:64)
[junit] at
org.hibernate.tuple.EntityMetamodel.<init>(EntityMetamodel.java:257)
[junit] at
org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:412)
[junit] at
org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:108)
[junit] at
org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
[junit] at
org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:215)
[junit] at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1154)
[junit] at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:375)
[junit] at
org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:533)
[junit] at
org.hibernate.ejb.Ejb3Configuration.createFactory(Ejb3Configuration.java:109)
[junit] at
org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:155)
[junit] at
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:82)
[junit] at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:37)
[junit] at d1.persist.PersistTools.createManagerFactory(PersistTools.java:82)
[junit] at
d1.persist.PersistTools.createDefaultManagerFactory(PersistTools.java:76)
[junit] at d1.persist.test.Ejb3TestBase.setUp(Ejb3TestBase.java:27)
[junit] at junit.framework.TestCase.runBare(TestCase.java:125)
[junit] at junit.framework.TestResult$1.protect(TestResult.java:106)
[junit] at junit.framework.TestResult.runProtected(TestResult.java:124)
[junit] at junit.framework.TestResult.run(TestResult.java:109)
[junit] at junit.framework.TestCase.run(TestCase.java:118)
[junit] at junit.framework.TestSuite.runTest(TestSuite.java:208)
[junit] at junit.framework.TestSuite.run(TestSuite.java:203)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:328)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:736)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:605)
[junit] Caused by: net.sf.cglib.core.CodeGenerationException:
java.lang.reflect.InvocationTargetException-->null
[junit] at
net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:237)
[junit] at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
[junit] at net.sf.cglib.proxy.Enhancer.createClass(Enhancer.java:317)
[junit] at
org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:126)
[junit] ... 30 more
[junit] Caused by: java.lang.reflect.InvocationTargetException
[junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[junit] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[junit] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[junit] at java.lang.reflect.Method.invoke(Method.java:585)
[junit] at net.sf.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:384)
[junit] at
net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:219)
[junit] ... 33 more
[junit] Caused by: java.lang.SecurityException: class
"d1.persist.Event$$EnhancerByCGLIB$$55c8eae8_2"'s signer information does
not match signer information of other classes in the same package
[junit] at java.lang.ClassLoader.checkCerts(ClassLoader.java:775)
[junit] at java.lang.ClassLoader.preDefineClass(ClassLoader.java:487)
[junit] at java.lang.ClassLoader.defineClass(ClassLoader.java:614)
[junit] ... 39 more
No doubt there is some way to configure hibernate to create proxies in a different
package, and I shall seek that option out. All I want to note here is that NPEs are not
the best way to report failure.
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David Cox (JIRA)