Erro: No persistence unit with name 'default' found

[Pavarinodu]

Olá pessoal!

Estou com um problema no meu projeto que envolve SpringMVC + Hibernate + JPA.

O eclipse dá esse erro ao rodar meu projeto no Apache Tomcat:

GRAVE: Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/spring-context.xml]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: No persistence unit with name 'default' found
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1031)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4997)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5289)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: No persistence unit with name 'default' found
	at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.obtainPersistenceUnitInfo(DefaultPersistenceUnitManager.java:685)
	at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.obtainDefaultPersistenceUnitInfo(DefaultPersistenceUnitManager.java:673)
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.determinePersistenceUnitInfo(LocalContainerEntityManagerFactoryBean.java:365)
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:314)
	at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
	... 28 more

fev 12, 2016 7:40:11 PM org.apache.catalina.core.ApplicationContext log
GRAVE: StandardWrapper.Throwable
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/spring-context.xml]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: No persistence unit with name 'default' found
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1031)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4997)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5289)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: No persistence unit with name 'default' found
	at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.obtainPersistenceUnitInfo(DefaultPersistenceUnitManager.java:685)
	at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.obtainDefaultPersistenceUnitInfo(DefaultPersistenceUnitManager.java:673)
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.determinePersistenceUnitInfo(LocalContainerEntityManagerFactoryBean.java:365)
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:314)
	at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
	... 28 more

fev 12, 2016 7:40:11 PM org.apache.catalina.core.StandardContext loadOnStartup
GRAVE: Servlet [Spring MVC Dispatcher] in web application [/SoloProject] threw load() exception
java.lang.IllegalArgumentException: No persistence unit with name 'default' found
	at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.obtainPersistenceUnitInfo(DefaultPersistenceUnitManager.java:685)
	at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.obtainDefaultPersistenceUnitInfo(DefaultPersistenceUnitManager.java:673)
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.determinePersistenceUnitInfo(LocalContainerEntityManagerFactoryBean.java:365)
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:314)
	at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1031)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4997)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5289)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

---

Seguem meus arquivos de configuração utilizados:

persistence.xml

<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_2_0.xsd"
    version="2.0">

 <persistence-unit name="produtos">
   <!-- provedor/implementacao do JPA -->
   <provider>org.hibernate.ejb.HibernatePersistence</provider>

   <!-- entidade mapeada -->
   <class>modelos.Produto</class>

	    <properties>
			<!--  propriedades do hibernate -->
			 <property name="hibernate.dialect" 
			    value="org.hibernate.dialect.MySQL5InnoDBDialect" />
			<property name="hibernate.show_sql" value="true" />
			<property name="hibernate.format_sql" value="true" />
			<property name="hibernate.hbm2ddl.auto" value="update" />
	    
		</properties>	   
 </persistence-unit>
 
 <persistence-unit name="clientes">
 	<!-- provedor/implementacao do JPA -->
   <provider>org.hibernate.ejb.HibernatePersistence</provider>

   <!-- entidade mapeada -->
   <class>modelos.Cliente</class>

	    <properties>		    
			<!--  propriedades do hibernate -->
			 <property name="hibernate.dialect" 
			    value="org.hibernate.dialect.MySQL5InnoDBDialect" />
			<property name="hibernate.show_sql" value="true" />
			<property name="hibernate.format_sql" value="true" />
			<property name="hibernate.hbm2ddl.auto" value="update" />
	    
		</properties>	
 </persistence-unit>
 
 <persistence-unit name="pedidos">
 	<!-- provedor/implementacao do JPA -->
   <provider>org.hibernate.ejb.HibernatePersistence</provider>

   <!-- entidade mapeada -->
   <class>modelos.Pedido</class>

	    <properties>
			<!--  propriedades do hibernate -->
			 <property name="hibernate.dialect" 
			    value="org.hibernate.dialect.MySQL5InnoDBDialect" />
			<property name="hibernate.show_sql" value="true" />
			<property name="hibernate.format_sql" value="true" />
			<property name="hibernate.hbm2ddl.auto" value="update" />
	    
		</properties>	
 </persistence-unit>
 
</persistence>

---

spring-context.xml

<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:mvc="http://www.springframework.org/schema/mvc"
  xmlns:tx="http://www.springframework.org/schema/tx"
  xsi:schemaLocation="http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd 
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd 
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/tx 
    http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

  <context:component-scan base-package="modelos" />
  <context:component-scan base-package="dao"/>
  <context:component-scan base-package="control"/>
  
  <mvc:annotation-driven />
  <tx:annotation-driven />

  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/jsp/"/>
    <property name="suffix" value=".jsp"/>
  </bean>
  
  <bean id="mysqlDataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://localhost/solo"/>
    <property name="username" value="root"/>
    <property name="password" value="root"/>
  </bean>
  
  <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
	<property name="dataSource" ref="mysqlDataSource" />
	<property name="jpaVendorAdapter">
		<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
	</property>
  </bean>
  
  <bean id="transactionManager" 
      class="org.springframework.orm.jpa.JpaTransactionManager">
  	<property name="entityManagerFactory" ref="entityManagerFactory"/>
  </bean>

</beans>

---

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
		 xmlns="http://java.sun.com/xml/ns/javaee" 
		 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
		 version="3.0">
  <display-name>SoloProject</display-name>
  	<servlet>
	  <servlet-name>Spring MVC Dispatcher</servlet-name>
	  <servlet-class>
	    org.springframework.web.servlet.DispatcherServlet
	  </servlet-class>
	  <init-param>
	    <param-name>contextConfigLocation</param-name>
	    <param-value>
	      /WEB-INF/spring-context.xml
	    </param-value>
	  </init-param>
	  <load-on-startup>1</load-on-startup>
	</servlet>
	
	<servlet-mapping>
	  <servlet-name>Spring MVC Dispatcher</servlet-name>
	  <url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<session-config>
		<session-timeout>3</session-timeout>
	</session-config>
</web-app>

---

Como vocês podem observar, há apenas 3 persistent-units configuradas:
“produtos”, “clientes” e “pedidos”; não há nenhuma PU com nome “default”, como o log de erro indica.

Todos os arquivos estão nas pastas corretas, para informação segue a formação:

src/main/java/META-INF/persistence.xml

src/WebContent/WEB-INF/spring-context.xml

src/WebContent/web.xml

---

Agradeço já a ajuda de todos!
Caso eu tenha feito algo de errado no post, me desculpem, pois é a primeira vez que posto algo no fórum!

[igomes]

Posta aonde você cria seu EntityManager

[Pavarinodu]

Eu estou criando os EntityManager’s dentro dos DAOs, utilizando a anotação @PersistenceContext. Segue um exemplo de uma classe (Cliente.java) e seu DAO (ClienteDAO.java). Os outros modelos e DAOs são criados exatamente da mesma forma, a não ser pelas mudanças de Getters e Setters de atributos.

---

Cliente.java:

package modelos;

import java.util.List;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.validation.constraints.NotNull;

@Entity
public class Cliente {
	@Id
	@GeneratedValue
	private Long id;
	
	@NotNull
	private String nome;
	
	@GeneratedValue
	private Long carrinhoId;
	
	@OneToMany
	private List<Pedido> historicoPedidos;
	
	@NotNull
	private String username;
	
	@NotNull
	private String password;

	/*
	 * Getters and Setters
	 */
	public Long getId() {
		return id;
	}

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

	public String getNome() {
		return nome;
	}

	public void setNome(String nome) {
		this.nome = nome;
	}

	public Long getCarrinhoId() {
		return carrinhoId;
	}

	public void setCarrinhoId(Long carrinhoId) {
		this.carrinhoId = carrinhoId;
	}

	public List<Pedido> getHistoricoPedidos() {
		return historicoPedidos;
	}

	public void setHistoricoPedidos(List<Pedido> historicoPedidos) {
		this.historicoPedidos = historicoPedidos;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}
}

ClienteDAO.java

package dao;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.springframework.stereotype.Repository;

import modelos.Cliente;
import modelos.Pedido;

@Repository
public class ClienteDao {
	@PersistenceContext
	private EntityManager manager;
	
	/*
	 * Métodos DAO
	 */
	public void adiciona(Cliente c){
		manager.persist(c);
	}
	
	public void altera(Cliente c){
		manager.merge(c);
	}
	
	public void remove(Cliente c){
		manager.remove(c);
	}
	
	public Cliente buscaPorId(Long id){
		return manager.find(Cliente.class, id);
	}
	
	@SuppressWarnings("unchecked")
	public List<Pedido> getPedidos(Cliente c){
		return manager.createQuery("select p from Pedido where p.cliente.id = " + c.getId() + ";").getResultList();
	}
	
	public boolean existe(Cliente cliente){
		if(buscaPorId(cliente.getId()) != null){
			return true;
		}
		
		return false;
	}
}

---

Segue também o código do meu Controller:

SVControl.java

package control;

import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import dao.ClienteDao;
import modelos.Cliente;
import modelos.Pedido;

@Transactional
@Controller
public class SVControl {
	
	@RequestMapping("")
	public String index(){
		return "index";
	}
	
	@RequestMapping("loginScreen")
	public String loginScreen(){
		return "loginScreen";
	}
	
	@RequestMapping("tryLogin")
	public String efetuaLogin(Cliente cliente, HttpSession session){
		if(new ClienteDao().existe(cliente)){
			session.setAttribute("clienteLogado", cliente);
			return "clientArea";
		}
		
		return "redirect:loginScreen";
	}
	
	@RequestMapping("logout")
	public String logout(HttpSession session){
		session.invalidate();
		return "redirect:index";
	}
	
	@RequestMapping("clientArea")
	public String areaCliente(){
		return "redirect:clienteArea";
	}
	
	@RequestMapping("getHistory")
	public String mostraHistorico(Cliente cliente, Model model){
		model.addAttribute("pedidos", new ClienteDao().getPedidos(cliente));
		return "history";
	}
	
	@RequestMapping("showOrder")
	public String mostraPedido(Pedido pedido, Model model){
		model.addAttribute("pedido", pedido.getId());
		return "detalhesPedido";
	}
}

[Daniel_Dias]

acho que esta faltando isso no seu spring-context.xml .

outra duvida . por qual razão voce tem 3 <persistence-unit name=""> ?

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
	<property name="dataSource" ref="mysqlDataSource" />
  <!-- tenta colocar isso -->
  <property name="persistenceUnitName" value="produtos ou cliente ou pedidos" />

	<property name="jpaVendorAdapter">
		<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
	</property>
  </bean>

[Pavarinodu]

Daniel, boa tarde.

Realmente removendo 2 das 3 PUs o sistema rodou perfeitamente!

Por que devo ter apenas 1 PU?
Devo “mapear” todas as classes que desejo dentro da única PU?

Muito obrigado pela ajuda!

[Daniel_Dias]

você deve ter somente 1 PU , e toda as classe que você quiser mapear deve ser informada ali.
Eu achei estranho demais ter 3 PU , nunca tinha visto isso, de onde voce tirou isso ?

[Pavarinodu]

Eu não havia entendido o conceito de PU até então, sou novo em desenvolvimento Java Web… Na minha cabeça, PU significava cada entidade que eu queria que fosse adicionada ao banco, e não a própria unidade de persistência -> banco de dados, como li agora em um material disponibilizado na Internet.

De qualquer forma, valeu pela ajuda.

[Daniel_Dias]

so por curiosidade, voce esta vendo Java Web começando já por Frameworks ? ou voce já viu servlets,jsp, etc antes ?

[Pavarinodu]

Já havia visto Servlets, jsp e tals. Segui o material da Caelum e tava tentando dar os primeiros passos sozinho.

[Daniel_Dias]

entendi. bons estudos ai.