org.hibernate.MappingException: Repeated column in mapping for entity

 org.hibernate.MappingException: Repeated column in mapping for entity: model.User column: ID (should be mapped with insert="false" update="false")
at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:676)
at org.hibernate.mapping.PersistentClass.checkPropertyColumnDuplication(PersistentClass.java:698)
at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:720)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:474)
at org.hibernate.mapping.RootClass.validate(RootClass.java:235)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1362)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1865)
at util.SessionUtil.<clinit>(SessionUtil.java:10)
... 1 more

Reason:

The annotation @Column name property is given the same value for two fields.


@Column(name = "ID")
private String id;

@Column(name = "ID")
private String name;

Solution:

Provide unique name for the column name.

@Column(name = "ID")
private String id;

@Column(name = "NAME")
private String name;

org.hibernate.MappingException: Association references unmapped class

org.hibernate.MappingException: Association references unmapped class: Bid
at org.hibernate.cfg.HbmBinder.bindCollectionSecondPass(HbmBinder.java:2503)
at org.hibernate.cfg.HbmBinder$CollectionSecondPass.secondPass(HbmBinder.java:2782)
at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:65)
at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1716)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1423)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1856)
at util.SessionUtil.<clinit>(SessionUtil.java:10)
... 1 more


Reason: The mapping xml does not specify the class name correctly.


<bag name="bids" cascade="all">
<key column="ITEM_ID" />
<one-to-many class="Bid" />
</bag>

In the above collection mapping, the Bid class does not declared using full path.

Solution:

Enter the fully qualified class name of the collection target class (Bid).

<bag name="bids" cascade="all">
<key column="ITEM_ID" />
<one-to-many class="model.Bid" />
</bag>

org.hibernate.HibernateException: /hibernate.cfg.xml not found

org.hibernate.HibernateException: /hibernate.cfg.xml not found
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
at org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:2176)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2157)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2137)
at util.SessionUtil.<clinit>(SessionUtil.java:10)

Reason: hibernate.cfg.xml is not found in the default location or the location specified to the configuration. Place the hibernate.cfg.xml file in root folder of the source code or specify the correct file path to configuration object.

org.hibernate.MappingException: An association from the table refers to an unmapped class:

org.hibernate.MappingException: An association from the table ADDRESS refers to an unmapped class: model.User
at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configuration.java:1824)
at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1756)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1423)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1856)
at util.SessionUtil.<clinit>(SessionUtil.java:10)
... 1 more

Reason:

Mapping for a non existent field is there in the mapping xml. I have an Address class. It has one-to-one relationship between User class. Later I delete the association from Address class, but forgot to delete the mapping from xml.

Solution:

1. Remove the unwanted property mapping element
2. Add the correct property back to the class.

DuplicateMappingException: Duplicate collection role mapping

Caused by: org.hibernate.DuplicateMappingException: Duplicate collection role mapping model.ItemSet.images
at org.hibernate.cfg.Configuration$MappingsImpl.addCollection(Configuration.java:3211)
at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2189)
at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2164)
at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:412)
at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:326)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:177)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:4006)
... 6 more

Reason:

Mapping is redundant. Remove the duplicate entries.

org.hibernate.PropertyNotFoundException: Could not find a getter for images in class model.ItemSet

Caused by: org.hibernate.PropertyNotFoundException: Could not find a getter for images in class model.ItemSet
at org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:326)
at org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:320)
at org.hibernate.mapping.Property.getGetter(Property.java:304)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:297)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:155)
at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:77)
... 15 more

Reason:

Hibernate looks for getImages in the ItemSet class, but it could not find such method or the method is not accessible. The method is not available or the property name declared in the hbm.xml file is wrong.

Solution:

1. Declare the getter method

2. Correct the property name in class and mapping xml

3. Declare getter method using protected access specifier

org.hibernate.AnnotationException: A sorted collection has to define @Sort:

org.hibernate.AnnotationException: A sorted collection has to define @Sort: model.ItemSortedMap.images
at org.hibernate.cfg.annotations.CollectionBinder.bind(CollectionBinder.java:446)
at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1979)
at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:796)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:707)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:4035)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3989)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1398)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1856)
at util.SessionUtil.<clinit>(SessionUtil.java:10)
... 1 more


Reason: I used SortedMap as the property type. But does not annotate using @Sort annotation:

Solution: Add @Sort annotation or change the property type from SortedMap to Map.

org.hibernate.MappingException: Unknown entity: model.ItemSortedMap

org.hibernate.MappingException: Unknown entity: model.ItemSortedMap
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:693)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1485)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:120)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at main.TestSortedMap.main(TestSortedMap.java:32)

Reason: Annotated Entity class is not declared in hibernate.cfg.xml

Solution: Declare the annotated entity class name in the hibernate configuration file

org.hibernate.InstantiationException: No default constructor for entity: model.Address

org.hibernate.InstantiationException: No default constructor for entity: model.Address
at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:107)
at org.hibernate.tuple.component.AbstractComponentTuplizer.instantiate(AbstractComponentTuplizer.java:102)
at org.hibernate.type.ComponentType.instantiate(ComponentType.java:515)
at org.hibernate.type.ComponentType.deepCopy(ComponentType.java:434)
at org.hibernate.type.TypeHelper.deepCopy(TypeHelper.java:68)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:302)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at main.TestComponents.main(TestComponents.java:32)


Reason: Default constructor is not found in the Address.java or the access specified is private.

Solution: Declare a default no-arg constructor for the class

org.hibernate.MappingNotFoundException: resource: mapping/Address.hbm.xml not found

Caused by: org.hibernate.MappingNotFoundException: resource: mapping/Address.hbm.xml not found
at org.hibernate.cfg.Configuration.addResource(Configuration.java:799)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2344)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2310)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2290)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2243)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2158)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2137)
at util.SessionUtil.<clinit>(SessionUtil.java:10)
... 1 more


Reason: hibernate.cfg.xml specifies mapping xml. The Address.hbm.xml mapping file is not exist in the path specified.

Solution: Place the Address.hbm.xml mapping file in the path specified or speciy the path of Address.hbm.xml mapping file or remove the <mapping> resource element in the hibernate.cfg.xml

org.hibernate.MappingException: unmapped class

org.hibernate.MappingException: An association from the table USER refers to an unmapped class: Address
at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configuration.java:1824)
at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1756)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1423)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1856)

at util.SessionUtil.<clinit>(SessionUtil.java:10)

... 1 more

Reason: The address class specified in not existing or the FQCN is not correct or the mapping file is not available for the Address class. Correct the issues by placing the class in appropriate package or specify the correct fully qualified class name or create mapping file.

org.hibernate.PropertyAccessException: IllegalArgumentException

org.hibernate.PropertyAccessException: IllegalArgumentException occurred while calling setter of model.ItemSortedMap.images
at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:128)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:583)
at org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:229)
at org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3847)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:299)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at main.TestSortedMap.main(TestSortedMap.java:32)
Caused by: java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.property.BasicPropertyAccessor$BasicSetter.set(BasicPropertyAccessor.java:66)
... 15 more

Reason:

I used sorted collection in the java object and does not specify sort="natural" in the mapping xml.

Solution:

Add sort="natural" in the mapping xml.

Unable to configure EntityManagerFactory hibernate.cfg.xml not found

Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: testuser] Unable to configure EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:378)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at main.TestUser.main(TestUser.java:19)
Caused by: org.hibernate.HibernateException: /hibernate.cfg.xml not found
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
at org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:2176)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2157)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:212)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:999)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:282)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:366)
... 4 more

Solution:

Place the hibernate.cfg.xml in the root of the project classpath.

No Persistence provider for EntityManager named testuser

Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named testuser
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at main.TestUser.main(TestUser.java:19)

Reason:

persistence.xml is not in the META-INF folder.

Solution:

When using Java Persistence API outside the container the persistence.xml must be in folder src\META-INF. Add src to the classpatch not META-INF.

DEFAULT keyword cannot be used as column has no DEFAULT

 java.sql.SQLSyntaxErrorException: DEFAULT keyword cannot be used as column has no DEFAULT
at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCPreparedStatement.<init>(Unknown Source)
at org.hsqldb.jdbc.JDBCConnection.prepareStatement(Unknown Source)
at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:524)
at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:116)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.prepare(IdentityGenerator.java:90)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:54)
... 16 more

Reason:

Table has column more than the properties of persistent object.

Solution:

Remove the column  from the table or add appropriate properties in the persistent class.

Unable to instantiate default tuplizer

Exception in thread "main" java.lang.ExceptionInInitializerError
at main.TestUser.main(TestUser.java:18)
Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:108)
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:133)
at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:80)
at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:322)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:485)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:133)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:286)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872)
at util.SessionUtil.<clinit>(SessionUtil.java:10)
... 1 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:105)
... 10 more
Caused by: java.lang.NoClassDefFoundError: javassist/util/proxy/MethodFilter
at org.hibernate.bytecode.javassist.BytecodeProviderImpl.getProxyFactoryFactory(BytecodeProviderImpl.java:49)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactoryInternal(PojoEntityTuplizer.java:205)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:183)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:167)
at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:77)
... 15 more
Caused by: java.lang.ClassNotFoundException: javassist.util.proxy.MethodFilter
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 20 more


Reason:

This exception happens because the required java assist jar is not in the classpath.

Solution:

Add the java assist jar to the classpath.

java.lang.ClassCastException: java.util.HashSet cannot be cast to java.util.List

java.lang.ClassCastException: java.util.HashSet cannot be cast to java.util.List
at org.hibernate.type.ListType.wrap(ListType.java:62)
at org.hibernate.event.def.WrapVisitor.processArrayOrNewCollection(WrapVisitor.java:106)
at org.hibernate.event.def.WrapVisitor.processCollection(WrapVisitor.java:73)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:122)
at org.hibernate.event.def.WrapVisitor.processValue(WrapVisitor.java:120)
at org.hibernate.event.def.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:77)
at org.hibernate.event.def.AbstractSaveEventListener.visitCollectionsBeforeSave(AbstractSaveEventListener.java:390)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:295)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at dao.CategoryDAO.createCategory(CategoryDAO.java:32)
at main.TestAd.populateData(TestAd.java:71)
at main.TestAd.main(TestAd.java:35)

Issue:

The class types of Java object and mapping is not same. I used java.util.Set to associate in java class, where I declared associations using <list> in the mapping xml.

Solution:

Make the types same in java and mappings

org.hibernate.MappingException: persistent class not known

Caused by: org.hibernate.MappingException: persistent class not known: model.address
at org.hibernate.cfg.Configuration$1.getIdentifierType(Configuration.java:2934)
at org.hibernate.type.EntityType.getIdentifierType(EntityType.java:560)
at org.hibernate.type.EntityType.getIdentifierOrUniqueKeyType(EntityType.java:585)
at org.hibernate.persister.entity.AbstractPropertyMapping.initIdentifierPropertyPaths(AbstractPropertyMapping.java:236)
at org.hibernate.persister.entity.AbstractPropertyMapping.initPropertyPaths(AbstractPropertyMapping.java:224)
at org.hibernate.persister.entity.AbstractEntityPersister.initOrdinaryPropertyPaths(AbstractEntityPersister.java:1863)
at org.hibernate.persister.entity.AbstractEntityPersister.initPropertyPaths(AbstractEntityPersister.java:1902)
at org.hibernate.persister.entity.AbstractEntityPersister.postConstruct(AbstractEntityPersister.java:3128)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:439)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:286)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872)
at util.SessionUtil.<clinit>(SessionUtil.java:10)
... 1 more

Issue:

There is a typo in the mapping xml. Instead of model.Address I typed model.address.

Solution:

Enter correct FQDN of class name.

org.hibernate.HibernateException: Javassist Enhancement failed

Exception in thread "main" org.hibernate.HibernateException: Javassist Enhancement failed: model.User
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:142)
at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:71)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:631)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:3736)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:360)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:281)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1090)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:1038)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:630)
at org.hibernate.type.EntityType.resolve(EntityType.java:438)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:139)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:982)
at org.hibernate.loader.Loader.doQuery(Loader.java:857)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)
at org.hibernate.loader.Loader.loadCollection(Loader.java:2166)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:62)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:627)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1863)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:369)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:111)
at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:186)
at main.TestAd.displayData(TestAd.java:49)
at main.TestAd.main(TestAd.java:35)
Caused by: java.lang.InstantiationException: model.User_$$_javassist_2
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:139)
... 24 more

Issue:

Hibernate is not able to instantiate the model User using java assist.


Solution:

Create a default no-arg constructor to the class User

java.sql.SQLSyntaxErrorException: user lacks privilege or object not found: USERID

Caused by: org.hibernate.exception.SQLGrammarException: could not insert: [model.Phone]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:92)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2345)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2852)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:320)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at dao.PhoneDAO.createPhone(PhoneDAO.java:34)
... 2 more
Caused by: java.sql.SQLSyntaxErrorException: user lacks privilege or object not found: USERID
at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCPreparedStatement.<init>(Unknown Source)
at org.hsqldb.jdbc.JDBCConnection.prepareStatement(Unknown Source)
at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:524)
at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:116)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.prepare(IdentityGenerator.java:90)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:54)

Reason :

The column does not match. I created schema using a mapping xml file. After creating schema I modified the column name of a property. This cause the exception java.sql.SQLSyntaxErrorException: user lacks privilege or object not found: USERID  and SQLGrammarException: could not insert: [model.Phone].

Solution:

1. Make sure the column names are same
2. If you change a mapping.hbm.xml update DB schema

Schema text failed: Could not parse mapping document from file \samples\src\mapping\advert.hbm.xml

Schema text failed: Could not parse mapping document from file samples\src\mapping\advert.hbm.xml
at org.hibernate.tool.hbm2ddl.SchemaExportTask.execute(SchemaExportTask.java:172)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423)
at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from file C:\mokader\CCA\workspace\samples\src\mapping\advert.hbm.xml
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:4009)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXmlQueue(Configuration.java:3998)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3986)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1398)
at org.hibernate.cfg.Configuration.generateDropSchemaScript(Configuration.java:1002)
at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:130)
at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:92)
at org.hibernate.tool.hbm2ddl.SchemaExportTask.getSchemaExport(SchemaExportTask.java:241)
at org.hibernate.tool.hbm2ddl.SchemaExportTask.execute(SchemaExportTask.java:169)
... 16 more
Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping model.Advert
at org.hibernate.cfg.Configuration$MappingsImpl.addClass(Configuration.java:3179)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:178)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:4006)
... 24 more
--- Nested Exception ---
org.hibernate.InvalidMappingException: Could not parse mapping document from file C:\mokader\CCA\workspace\samples\src\mapping\advert.hbm.xml
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:4009)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXmlQueue(Configuration.java:3998)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3986)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1398)
at org.hibernate.cfg.Configuration.generateDropSchemaScript(Configuration.java:1002)
at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:130)
at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:92)
at org.hibernate.tool.hbm2ddl.SchemaExportTask.getSchemaExport(SchemaExportTask.java:241)
at org.hibernate.tool.hbm2ddl.SchemaExportTask.execute(SchemaExportTask.java:169)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423)
at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137)
Caused by: org.hibernate.DuplicateMappingException: Duplicate class/entity mapping model.Advert
at org.hibernate.cfg.Configuration$MappingsImpl.addClass(Configuration.java:3179)
at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:178)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:4006)
... 24 more

I am learning hibernate using Pro Hibernate 3 by DAVE MINTER AND JEFF LINWOOD. I followed the examples in the book. For the samples in the Chapter 3, while I execute the ant build to generate schema,  I got the above exception.

Problem:

I have specified the .hbm.xml in two places. one in hibernate.cfg.xml and other in ant build script. This cause the "Duplicate class/entity mapping model.Advert" exception.

Solution:

Remove the mapping elements from the hibernate.cfg.xml.

Upon technology eagerness and features available in popular ORM framework Hibernate, I started learning Hibernate in 2008. To share my experience with Hibernate to you and to have a  pleasant memory and footprint  I started this blog Today ( January 18 2012). Have a fun with Hibernate.