Getting org.hibernate.DuplicateMappingException: duplicate class / entity mapping in hibernate3.0

I am trying to run a webapp using hibernate3.0

with struts2-core-2.1.6

on Tomcat7.0.55

using JDK8

. I receive org.hibernate.DuplicateMappingException: Duplicate class/entity mapping com.poste.struts2.bean.CityDetails

. My hibernate.cfg.xml

:

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
  "-//Hibernate/Hibernate Configuration DTD//EN"
  "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
     <session-factory>     
        <property name="connection.useUnicode">true</property> 
        <property name="connection.characterEncoding">UTF-8</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/mydb</property>
        <property name="connection.username">uname</property>
        <property name="connection.password">pass</property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="current_session_context_class">thread</property>
        <property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>     
        <property name="hibernate.show_sql">true</property> 
        <property name="format_sql">true</property> 
        <property name="hibernate.use_sql_comments">true</property>         
        <mapping class="com.poste.struts2.bean.CityDetails" />
        </session-factory>
</hibernate-configuration>

      

        
        
        
      

    

Class code:

package com.poste.struts2.bean;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import org.hibernate.annotations.GenericGenerator;
@Entity
@Table(name = "city_master")
public class CityDetails implements Serializable {
    private static final long serialVersionUID = 9149826260758390091L;
    private Long cityId;
    private String cityName;
    private String cityStatus;
    @Id
    @GenericGenerator(name="generator", strategy="increment")
    @GeneratedValue(generator="generator")
    @Column(name = "CITM_CITY_ID")
    public Long getCityId(){
        return this.cityId;
    }
    public void setCityId(Long cityId){
        this.cityId = cityId;
    }
    @Column(name = "CITM_CITY_NAME", columnDefinition = "nvarchar", length = 100)
    public String getCityName(){
        return this.cityName;
    }
    public void setCityName(String cityName){
        this.cityName = cityName;
    }
    @Column(name = "CITM_STATUS")
    public String getCityStatus() {
        return cityStatus;
    }
    public void setCityStatus(String cityStatus) {
        this.cityStatus = cityStatus;
    }
}

      

        
        
        
      

    

My WEB-INF / lib contains

activation-1.1.jar
antlr-2.7.6.jar
commons-beanutils.jar
commons-collections-3.1.jar
commons-fileupload-1.2.1.jar
commons-io-1.3.2.jar
commons-lang-2.3.jar
commons-logging-1.0.4.jar
dom4j-1.6.1.jar
ejb3-persistence.jar
freemarker-2.3.16.jar
hibernate-annotations.jar
hibernate-commons-annotations.jar
hibernate-validator.jar
hibernate3.jar
hsqldb.jar
httpclient-4.0.jar
itext-2.1.7.jar
java-mail-1.4.4.jar
JavaBridge.jar
javassist.jar
javax.persistence.jar
jcommon-1.0.16.jar
jfreechart-1.0.13.jar
json.jar
jta-1.1.jar
junit-3.8.1.jar
log4j-1.2.14.jar
mysql-connector-java-5.1.32.jar
ognl-2.6.11.jar
php-servlet.jar
poi-3.2-FINAL-20081019.jar
slf4j-api-1.5.8.jar
slf4j-log4j12-1.5.8.jar
slf4j-simple-1.5.8.jar
struts2-convention-plugin-2.1.6.jar
struts2-core-2.1.6.jar
struts2-dojo-plugin-2.2.3.jar
struts2-fullhibernatecore-plugin-1.4-GA.jar
struts2tutorial.jar
xwork-2.1.2.jar

      

        
        
        
      

    

COLUMNS:

CITM_CITY_ID    decimal(10,0)
CITM_CITY_NAME  varchar(200 
CITM_STATUS     varchar(20) 

      

        
        
        
      

    

Any idea? Thanks to