i am getting error stack below,when i am implementing Second Level Cache with EcCacheProvider

eccache.xml
<ehcache>

<diskStore path="java.io.tmpdir"/>


<defaultCache
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"
/>
<cache name="com.hibernate.pojo.employee"
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="300"
timeToLiveSeconds="600"
overflowToDisk="true"
/>


<!-- Place configuration for your caches following -->

</ehcache>

hibnerate.cfg.xml:

<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">


<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://127.0.0.1:3306/YYY</property>
<property name="connection.username">root</property>
<property name="connection.password">XXXX</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.pool_size">10</property>

<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>


<property name="hibernate.transaction.auto_close_session">true</property>
<property name="hibernate.generate_statistics ">true</property>
<property name="hibernate.cache.region_prefix">arYYk</property>
<property name="hibernate.connection.autocommit">true</property>

<property name="hibernate.cache.provider_class">org.hibernate.cache.EHCacheProvider</property>
<property name="hibernate.cache.use_query_cache">true</property>
<property name="hibernate.cache.use_second_level_cache">true</property>

<mapping resource="hbm/employee.hbm.xml"/>
</session-factory>
</hibernate-configuration>

package org.hibernate.sample.examples;

import java.util.Iterator;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.hibernate.factory.HibernateUtil;
import com.hibernate.pojo.Employee;

public class HibernateCache {

/**
* @param args
*/
public static void main(String[] args) {
queryCache();

}

private static void queryCache() {
Transaction tran =null;
try
{
Session session = HibernateUtil.getInstance().getSession();
tran=session.beginTransaction();
tran.begin();
Query query = session.createQuery(" from Employee ");
// query.setString(0, "Hibernate");
List list = query.list();

query.setCacheable(true);

Iterator< Employee> it=list.iterator();
while(it.hasNext())
{
Employee employee =it.next();
System.out.println(employee.getEmpid() + " "+employee.getEname());
}


tran.commit();


}catch(Exception ee)
{
tran.rollback();
ee.printStackTrace();

}


}

}

HibernateUtil.java:

package com.hibernate.factory;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
private static SessionFactory sessionFactory = null;
private static HibernateUtil hibernateFactory = null;
static
{
try
{
sessionFactory = new Configuration().configure().buildSessionFactory();
}catch(HibernateException e)
{
e.printStackTrace();
System.out.println("Error while creating Session Factory");
}
}
public SessionFactory getSessionFactory()
{
return sessionFactory;
}
private HibernateUtil()
{

}
public Session getSession()
{
try
{
return sessionFactory.openSession();
}catch(Exception e)
{
System.out.println("Error while create Session"+e);
return null;
}
}

public void closeSession(Session session)
{
try
{
if(session !=null)

session.close();

}catch(HibernateException e)
{
System.out.println(" ******** Error while closing Session"+e);
}
}
public static HibernateUtil getInstance()
{
if(hibernateFactory == null)
hibernateFactory = new HibernateUtil();
return hibernateFactory;
}

public Session getSession(String file)
{
try
{
SessionFactory configSessionFactory = new Configuration().configure(file).buildSessionFactory();
return configSessionFactory.openSession();
}catch(HibernateException hibernateException)
{
System.out.println("Error while creating session"+hibernateException);
return null;
}
}
}

employee.hbm.xml:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!--
This mapping demonstrates content-based discrimination for the
table-per-hierarchy mapping strategy, using a formula
discriminator.
-->

<hibernate-mapping
package="com.hibernate.pojo">
<class name="Employee" table="employee">

<cache usage="read-write"/>
<id name="empid" type="int" unsaved-value="0" >
<generator class="increment"/>
</id>
<property name="ename"/>
</class>

<!--
<query name="ByNameAndMaximumWeight">
<![CDATA[ from employee] ]>
</query> -->

</hibernate-mapping>



Error :
31 [main] INFO org.hibernate.cfg.Environment - Hibernate 3.3.2.GA
47 [main] INFO org.hibernate.cfg.Environment - hibernate.properties not found
47 [main] INFO org.hibernate.cfg.Environment - Bytecode provider name : javassist
62 [main] INFO org.hibernate.cfg.Environment - using JDK 1.4 java.sql.Timestamp handling
234 [main] INFO org.hibernate.cfg.Configuration - configuring from resource: /hibernate.cfg.xml
234 [main] INFO org.hibernate.cfg.Configuration - Configuration resource: /hibernate.cfg.xml
749 [main] INFO org.hibernate.cfg.Configuration - Reading mappings from resource : hbm/employee.hbm.xml
921 [main] INFO org.hibernate.cfg.HbmBinder - Mapping class: com.hibernate.pojo.Employee -> employee
968 [main] INFO org.hibernate.cfg.Configuration - Configured SessionFactory: null
1093 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - Using Hibernate built-in connection pool (not for production use!)
1093 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - Hibernate connection pool size: 10
1093 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - autocommit mode: true
1108 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - using driver: com.mysql.jdbc.Driver at URL: jdbc:mysql://127.0.0.1:3306/ark
1108 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - connection properties: {user=root, password=****, autocommit=true}
1732 [main] INFO org.hibernate.cfg.SettingsFactory - RDBMS: MySQL, version: 5.1.28-rc-community
1732 [main] INFO org.hibernate.cfg.SettingsFactory - JDBC driver: MySQL-AB JDBC Driver, version: mysql-connector-java-5.1.3-rc ( Revision: ${svn.Revision} )
1795 [main] INFO org.hibernate.dialect.Dialect - Using dialect: org.hibernate.dialect.MySQLDialect
1795 [main] INFO org.hibernate.transaction.TransactionFactoryFactory - Transaction strategy: org.hibernate.transaction.JDBCTransactionFactory
1796 [main] INFO org.hibernate.transaction.TransactionManagerLookupFactory - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Automatic flush during beforeCompletion(): disabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Automatic session close at end of transaction: enabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - JDBC batch size: 15
1796 [main] INFO org.hibernate.cfg.SettingsFactory - JDBC batch updates for versioned data: disabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Scrollable result sets: enabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - JDBC3 getGeneratedKeys(): enabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Connection release mode: auto
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Maximum outer join fetch depth: 2
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Default batch fetch size: 1
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Generate SQL with comments: disabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Order SQL updates by primary key: disabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Order SQL inserts for batching: disabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
1796 [main] INFO org.hibernate.hql.ast.ASTQueryTranslatorFactory - Using ASTQueryTranslatorFactory
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Query language substitutions: {}
1796 [main] INFO org.hibernate.cfg.SettingsFactory - JPA-QL strict compliance: disabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Second-level cache: enabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Query cache: enabled
1796 [main] INFO org.hibernate.cfg.SettingsFactory - Cache region factory : org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge
1796 [main] INFO org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge - Cache provider: org.hibernate.cache.EHCacheProvider
org.hibernate.HibernateException: could not instantiate RegionFactory [org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge]
at org.hibernate.cfg.SettingsFactory.createRegionFactory(SettingsFactory.java:389)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:262)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2119)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2115)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1339)
at com.hibernate.factory.HibernateUtil.<clinit>(HibernateUtil.java:15)
at org.hibernate.sample.examples.HibernateCache.queryCache(HibernateCache.java:27)
at org.hibernate.sample.examples.HibernateCache.main(HibernateCache.java:19)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at org.hibernate.cfg.SettingsFactory.createRegionFactory(SettingsFactory.java:384)
... 7 more
Caused by: org.hibernate.cache.CacheException: could not instantiate CacheProvider [org.hibernate.cache.EHCacheProvider]
at org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge.<init>(RegionFactoryCacheProviderBridge.java:66)
... 12 more
Caused by: java.lang.ClassNotFoundException: org.hibernate.cache.EHCacheProvider
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
at org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge.<init>(RegionFactoryCacheProviderBridge.java:63)
... 12 more
Error while creating Session Factory
Error while create Sessionjava.lang.NullPointerException
Exception in thread "main" java.lang.NullPointerException
at org.hibernate.sample.examples.HibernateCache.queryCache(HibernateCache.java:66)
at org.hibernate.sample.examples.HibernateCache.main(HibernateCache.java:19)

What line of code is triggering this error?

i am posted complete code for implementating Second Level cache with EHCaheProvider........

It can't find the EhCacheProvider class name.

You have EHCacheProvider not EhCacheProvider.

Caused by: java.lang.ClassNotFoundException: org.hibernate.cache.EHCacheProvider
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)