[Data] Unable to build EntityManagerFactory

Bonjour,
J'ai un souci de configuration de JPA via Spring, voila mon fichier applicationContext.xml :

Code:

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<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
     <property name="dataSource" ref="mobistatwebDS"/>
     <property name="persistenceUnitName" value="msw_base" />
     <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
           <property name="showSql" value="true" />
           <property name="generateDdl" value="true" />
           <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
        </bean>
     </property>
  </bean>
 
  <bean id="mybaseDS" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/my_base?zeroDateTimeBehavior=convertToNull" />
        <property name="username" value="myLoginRoot"/>
        <property name="password" value="myPassRoot"/>
  </bean>
 
  <bean class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
  </bean>
 
 
  <bean id="txManager" class="org.springframework.transaction.jta.JtaTransactionManager" p:entityManagerFactory-ref="entityManagerFactory">
		<property name="jpaDialect">
			<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
		</property>
	</bean>
 
  <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
 
 
  <bean id="genericFacade" class="fr.msw.ejb3.session.bean.GenericFacadeBean" />

Voici mon fichier persistence.xml :

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<persistence
    xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
    version="1.0"> 
   <persistence-unit name="msw_base" transaction-type="JTA">
   	<provider>org.hibernate.ejb.HibernatePersistence</provider>
   	<jta-data-source>java:/mybaseDS</jta-data-source> 
      <properties>
         <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
		 <property name="hibernate.hbm2ddl.auto" value="validate" /> 
      </properties>            
   </persistence-unit>            
   <persistence-unit name="my_base_admin" transaction-type="JTA"> 
   	<jta-data-source>java:/mobistatadminDS</jta-data-source>  
      <properties>   
         <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
		 <property name="hibernate.hbm2ddl.auto" value="create-validate" />   
      </properties>                                       
   </persistence-unit>                                          
 
</persistence>

Et voici la trace d'erreur complète :

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org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory''entityManagerFactory'"load()"

Quelqu'un peut me dire ce qui manque ?