Unable to configure second level cache of hibernate-ehcache-4.3.5.Final.jar in Hibernate 5.1.0.Final

Question

I'm trying to achieve second level cache in my Java EE project using Hibernate. My Hibernate version is 5.1.0.Final. I've created a table employee in my MySQL database. I've included hibernate-ehcache-4.3.5.Final.jar in my project, but it's throwing Unable to create requested service [org.hibernate.cache.spi.RegionFactory] error. Here is the hibernate.cfg.xml:

<?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.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/intu</property>
    <property name="hibernate.connection.username">****</property>
    <property name="hibernate.connection.password">****</property>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

     <property name="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.EhCacheRegionFactory</property>
     <property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</property>  
<property name="hibernate.cache.use_second_level_cache">true</property>  



 <property name="show_sql">false</property>
 <property name="format_sql">true</property>
 <property name="hbm2ddl.auto">update</property>
 <mapping class="com.dom.Employee"/>  

 </session-factory>
 </hibernate-configuration>

My Employee class:

package com.intu;

import javax.persistence.Entity;
import javax.persistence.Table;

 import org.hibernate.annotations.Cache;
 import org.hibernate.annotations.CacheConcurrencyStrategy;

 @Entity
 @Cache(usage = CacheConcurrencyStrategy.READ_ONLY)
 @Table(name = "employee")
 public class Employee {
    private int id;
    private String name;


    public Employee() {
    }

    public Employee(String name, float salary) {
        super();
        this.name = name;
    }

    public int getId() {
         return id;
    }

    public void setId(int id) {
        this.id = id;
    }  

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    } 
}

My Code:

package com.test;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

import com.intu.Employee;
import com.util.HibernateUtil;

public class Ehcache {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println(org.hibernate.Version.getVersionString());
        SessionFactory factory = HibernateUtil.getSessionFactory();
        Session session1=factory.openSession();  
        Employee emp1=(Employee)session1.load(Employee.class,121);  
        System.out.println(emp1.getId()+" "+emp1.getName());  
        session1.close();  

        Session session2=factory.openSession();  
        Employee emp2=(Employee)session2.load(Employee.class,121);  
        System.out.println(emp2.getId()+" "+emp2.getName());  
        session2.close();   
    }
}

The error is

eb 23, 2016 3:10:49 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.1.0.Final}
 Feb 23, 2016 3:10:49 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Feb 23, 2016 3:10:49 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Initial SessionFactory creation  failed.org.hibernate.service.spi.ServiceException: Unable to create requested  service [org.hibernate.cache.spi.RegionFactory]
Exception in thread "main" java.lang.ExceptionInInitializerError
at com.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:20)
at com.util.HibernateUtil.<clinit>(HibernateUtil.java:7)
at com.test.Ehcache.main(Ehcache.java:14)
Caused by: org.hibernate.service.spi.ServiceException: Unable to create   requested service [org.hibernate.cache.spi.RegionFactory]
at   org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:244)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:208)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189)
at org.hibernate.boot.internal.MetadataBuilderImpl$MetadataBuildingOptionsImpl.<init>(MetadataBuilderImpl.java:663)
at org.hibernate.boot.internal.MetadataBuilderImpl.<init>(MetadataBuilderImpl.java:127)
at org.hibernate.boot.MetadataSources.getMetadataBuilder(MetadataSources.java:135)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:655)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
at com.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:13)
... 2 more
 Caused by: org.hibernate.HibernateException: could not instantiate    RegionFactory [net.sf.ehcache.hibernate.EhCacheRegionFactory]
at   org.hibernate.cache.internal.RegionFactoryInitiator.initiateService(RegionFactor  yInitiator.java:84)
at org.hibernate.cache.internal.RegionFactoryInitiator.initiateService(RegionFactor  yInitiator.java:29)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:88)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:234)

I'm not sure what exactly is missing. What should be added more to get it working?

Answer 1

You are using incompatible versions of EhCache and Hibernate, that leads to initialization issues. if you are using Hibernate 5.1, better to use the corresponding ehcache version to go with it:

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-ehcache</artifactId>
  <version>5.1.0.Final</version>
</dependency>