Erreur "No saved view state could be found for the view identifier"

Bonjour,

Je suis en train de développer une application avec JSF 2 et Hibernate et le probleme est qu'à chaque fois que je redémarre le serveur, je perds le rendu de la page index.jsp, du coup pour chaque modification je dois obligatoirement faire un redémarrage dans Eclipse.

J'ai cherché le forum mais les solutions ne correspondent pas à mon problème.

Voilà mon index.jsp

Code:

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<?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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>gestion-utilisateur</display-name>
  <welcome-file-list>
    <welcome-file>index.jsf</welcome-file>
  </welcome-file-list>
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.jsf</url-pattern>
  </servlet-mapping>
  <context-param>
    <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
    <param-value>resources.application</param-value>
  </context-param>
  <context-param>
    <description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
    <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
    <param-value>server</param-value>
  </context-param>
  <context-param>
    <description>
    This parameter tells MyFaces if javascript code should be allowed in
    the rendered HTML output.
    If javascript is allowed, command_link anchors will have javascript code
    that submits the corresponding form.
    If javascript is not allowed, the state saving info and nested parameters
    will be added as url parameters.
    Default is 'true'</description>
    <param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
    <param-value>true</param-value>
  </context-param>
  <context-param>
    <description>
    If true, rendered HTML code will be formatted, so that it is 'human-readable'
    i.e. additional line separators and whitespace will be written, that do not
    influence the HTML code.
    Default is 'true'</description>
    <param-name>org.apache.myfaces.PRETTY_HTML</param-name>
    <param-value>true</param-value>
  </context-param>
  <context-param>
    <param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
    <param-value>false</param-value>
  </context-param>
  <context-param>
    <description>
    If true, a javascript function will be rendered that is able to restore the
    former vertical scroll on every request. Convenient feature if you have pages
    with long lists and you do not want the browser page to always jump to the top
    if you trigger a link or button action that stays on the same page.
    Default is 'false'
</description>
    <param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
    <param-value>true</param-value>
  </context-param>
  <listener>
    <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
  </listener>
  <servlet>
    <description></description>
    <display-name>Validation</display-name>
    <servlet-name>Validation</servlet-name>
    <servlet-class>appli.servlets.Validation</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>Validation</servlet-name>
    <url-pattern>/Validation</url-pattern>
  </servlet-mapping>
 
  <!-- probleme de vue expiré  -->
<context-param>
    <param-name>facelets.BUILD_BEFORE_RESTORE</param-name>
    <param-value>true</param-value>
</context-param>
 
</web-app>

et mon index.jsp

Code:

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<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="f"  uri="http://java.sun.com/jsf/core"%>
<%@ taglib prefix="h"  uri="http://java.sun.com/jsf/html"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<f:view>
<h:form>
Login:
<h:inputText   value="#{user.login }"></h:inputText><br>
Mot de passe :
<h:inputSecret value="#{user.password }"></h:inputSecret>
<h:commandButton value="valider"  action="#{user.isUserExist}"></h:commandButton>
</h:form>
 
</f:view>
</body>
</html>

et mon faces-config.xml:

Code:

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<?xml version="1.0" encoding="UTF-8"?>
 
<faces-config
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd"
    version="1.2">
    <managed-bean>
        <managed-bean-name>user</managed-bean-name>
        <managed-bean-class>appli.beans.User</managed-bean-class>
        <managed-bean-scope>session</managed-bean-scope>
    </managed-bean>
    <navigation-rule>
        <display-name>index</display-name>
        <from-view-id>/index.jsp</from-view-id>
        <navigation-case>
            <from-outcome>succes</from-outcome>
            <to-view-id>/succes.jsp</to-view-id>
        </navigation-case>
    </navigation-rule>
    <navigation-rule>
        <display-name>index</display-name>
        <from-view-id>/index.jsp</from-view-id>
        <navigation-case>
            <from-outcome>fail</from-outcome>
            <to-view-id>/error.jsp</to-view-id>
        </navigation-case>
    </navigation-rule>
 
</faces-config>

Quelqu'un saurait-il m'indiquer comment résoudre ce problème ?

Merci d'avance pour votre aide.