org.hibernate.MappingException: Unknown entity: pack1.Persoana

Question

I receive this error and I don't know what is wrong with my hbm.xml file. I use Eclipse Mars and Hibernate 5.0.2.

Error:

Nov 15, 2015 11:49:19 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.0.2.Final}
Nov 15, 2015 11:49:19 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Nov 15, 2015 11:49:19 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Nov 15, 2015 11:49:19 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.0.Final}
Nov 15, 2015 11:49:20 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)
Nov 15, 2015 11:49:20 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/test]
Nov 15, 2015 11:49:20 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH000046: Connection properties: {user=root, password=****}
Nov 15, 2015 11:49:20 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH000006: Autocommit mode: false
Nov 15, 2015 11:49:20 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000115: Hibernate connection pool size: 20 (min=1)
Nov 15, 2015 11:49:20 PM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
org.hibernate.MappingException: Unknown entity: pack1.Persoana
    at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:776)
    at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1451)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:100)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)
    at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)
    at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
    at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:678)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:670)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:665)
    at pack1.Main.insert(Main.java:74)
    at pack1.Main.main(Main.java:34)
org.hibernate.MappingException: Unknown entity: pack1.Persoana
    at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:776)
    at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1451)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:100)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)
    at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)
    at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
    at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:678)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:670)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:665)
    at pack1.Main.insert(Main.java:74)
    at pack1.Main.main(Main.java:35)
org.hibernate.MappingException: Unknown entity: pack1.Persoana
    at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:776)
    at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1451)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:100)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)
    at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)
    at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
    at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:678)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:670)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:665)
    at pack1.Main.insert(Main.java:74)
    at pack1.Main.main(Main.java:36)
org.hibernate.UnknownEntityTypeException: Unable to locate persister: pack1.Persoana
    at org.hibernate.internal.SessionFactoryImpl.locateEntityPersister(SessionFactoryImpl.java:792)
    at org.hibernate.internal.SessionImpl.locateEntityPersister(SessionImpl.java:2641)
    at org.hibernate.internal.SessionImpl.access$2500(SessionImpl.java:164)
    at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.<init>(SessionImpl.java:2579)
    at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.<init>(SessionImpl.java:2566)
    at org.hibernate.internal.SessionImpl.byId(SessionImpl.java:1044)
    at org.hibernate.internal.SessionImpl.get(SessionImpl.java:955)
    at pack1.Main.update(Main.java:87)
    at pack1.Main.main(Main.java:42)
org.hibernate.UnknownEntityTypeException: Unable to locate persister: pack1.Persoana
    at org.hibernate.internal.SessionFactoryImpl.locateEntityPersister(SessionFactoryImpl.java:792)
    at org.hibernate.internal.SessionImpl.locateEntityPersister(SessionImpl.java:2641)
    at org.hibernate.internal.SessionImpl.access$2500(SessionImpl.java:164)
    at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.<init>(SessionImpl.java:2579)
    at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.<init>(SessionImpl.java:2566)
    at org.hibernate.internal.SessionImpl.byId(SessionImpl.java:1044)
    at org.hibernate.internal.SessionImpl.get(SessionImpl.java:955)
    at pack1.Main.delete(Main.java:105)
    at pack1.Main.main(Main.java:43)
Nov 15, 2015 11:49:21 PM org.hibernate.hql.internal.QueryTranslatorFactoryInitiator initiateService
INFO: HHH000397: Using ASTQueryTranslatorFactory
org.hibernate.hql.internal.ast.QuerySyntaxException: Persoana is not mapped [from Persoana]
    at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:79)
    at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:218)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:142)
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:115)
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:76)
    at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:150)
    at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:298)
    at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236)
    at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1825)
    at pack1.Main.afisare(Main.java:53)
    at pack1.Main.main(Main.java:44)
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: Persoana is not mapped
    at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:171)
    at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:91)
    at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:76)
    at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:321)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3678)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3567)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:708)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:564)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:301)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:249)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:262)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:190)
    ... 9 more

Main Class:

package pack1;
import java.util.List;
import java.util.Date;
import java.util.Iterator;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

public class Main {

    private static SessionFactory factory;
    private static Configuration configuration;

    private static ServiceRegistry serviceRegistry;

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        try{

            configuration = new Configuration().addResource("./hibernate.cfg.xml");
            configuration.configure();

            serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
            factory = configuration.buildSessionFactory(serviceRegistry);

            //Configuration config = new Configuration();
            //factory = config.configure().buildSessionFactory();
            insert(5, "Maria", 20);
            insert(6, "Ioana", 19);
            insert(7, "Denisa", 14);
        }
        catch(Throwable ex){
            System.err.println("Failed to create sessionFactory object." + ex);
            throw new ExceptionInInitializerError(ex);
        }
        update(2,22);
        delete(3);
        afisare();

    }

    private static void afisare( ){
        Session session = factory.openSession();
        Transaction tx = null;
        try{
            tx = session.beginTransaction();
            Query query= session.createQuery("from Persoana");//Hibernate Query Language (HQL)
            //se poate rula SQL cu createSQLQuery(…)
            List<Persoana> persoane = query.list();
            for (Persoana p: persoane){
                System.out.println(p);
            }
            tx.commit();
        }catch (HibernateException e) {
            if (tx!=null) tx.rollback();
            e.printStackTrace();
        }finally {
            session.close();
        }
    }

    private static void insert(int id, String nume, int varsta){
        Session session = factory.openSession();
        Transaction tx = null;
        try{
            tx = session.beginTransaction();
            Persoana pers= new Persoana(id, nume, varsta);
            session.save(pers);
            tx.commit();
        }catch (HibernateException e) {
            if (tx!=null) tx.rollback();
            e.printStackTrace();
        }finally { session.close(); }
    }

    private static void update(Integer id, int varsta ){
        Session session = factory.openSession();
        Transaction tx = null;
        try{
            tx = session.beginTransaction();
            Persoana pers= (Persoana)session.get(Persoana.class, id);
            pers.setVarsta( varsta );
            session.update(pers);
            tx.commit();
        }catch (HibernateException e) {
            if (tx!=null)
                tx.rollback();
            e.printStackTrace();
        }finally {
            session.close();
        }
    }

    private static void delete(Integer id){
        Session session = factory.openSession();
        Transaction tx = null;
        try{
            tx = session.beginTransaction();
            Persoana pers= (Persoana)session.get(Persoana.class, id);
            session.delete(pers);
            tx.commit();
        }catch (HibernateException e) {
            if (tx!=null) tx.rollback();
            e.printStackTrace();
        }finally {
            session.close();
        }
    }

}

This is the other class:

package pack1;

public class Persoana {

    private int id;
    private String nume;
    private int varsta;
    public Persoana(){}
    public Persoana(int id,String nume,int varsta){
        this.id=id;
        this.nume=nume;
        this.varsta=varsta;
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getNume() {
        return nume;
    }
    public void setNume(String nume) {
        this.nume = nume;
    }
    public int getVarsta() {
        return varsta;
    }
    public void setVarsta(int varsta) {
        this.varsta = varsta;
    }
    @Override
    public String toString() {
        return id + ", " + nume + ", " + varsta;
    }

}

This is my hibernate.cfg.xml file

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">rootpass</property>
        <mapping class="Persoana" resource="Persoana.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

And here is my hbm.xml file

<!-- Generated Nov 15, 2015 2:03:44 PM by Hibernate Tools 3.5.0.Final -->
<hibernate-mapping>
    <class name="pack1.Persoana" table="PERSOANA">
        <id name="id" type="int">
            <column name="ID" />
            <generator class="assigned" />
        </id>
        <property name="nume" type="java.lang.String">
            <column name="NUME" />
        </property>
        <property name="varsta" type="int">
            <column name="VARSTA" />
        </property>
    </class>
</hibernate-mapping>

Answer 1

Try to put package name into hibernate-mapping:

<hibernate-mapping package="pack1">
    <class name="Persoana" table="PERSOANA">

And remove class definition(class="Persoana") from mapping in cfg.xml.

Answer 2

Use <mapping resource="Persoana.hbm.xml" /> in hibernate.cfg.xml should be suffice

Answer 3

SOLVED! The problem that I found is related to the version of Hibernate. I had switched to Hibernate 4.3.6 Final and it works fine! So, do not use Hibernate version 5.0.2!