getting empty form session bean in jsf - session

Question

I have set session bean after login, and print the value from session bean it prints in xhtml file but while i go to the next page or bean session bean return empty it automatically reset the value.
I am using the primeface 4.0, jsf 2.0 and ejb 3.0 for web application.
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">
<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>*.xhtml</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.xhtml</welcome-file>
</welcome-file-list>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<!-- <context-param> <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>server</param-value> </context-param> -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<context-param>
<param-name>primefaces.THEME</param-name>
<param-value>ui-lightness</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.CHECK_ID_PRODUCTION_MODE</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.VIEW_UNIQUE_IDS_CACHE_ENABLED</param-name>
<param-value>true</param-value>
</context-param>
<mime-mapping>
<extension>xlsx</extension>
<mime-type>text/xlsx</mime-type>
</mime-mapping>
</web-app>
//Setting user from loginMB having viewscope bean.
UserMB
#SessionScoped
#ManagedBean(name = "userMB")
public class UserMB extends AbstractMB implements Serializable {
public static final String INJECTION_NAME = "#{userMB}";
private static final long serialVersionUID = 1L;
private User user;
#EJB
private UserEJB userEJB;
public String logOut() {
getRequest().getSession().invalidate();
return "/index.xhtml?faces-redirect=true";
}
private HttpServletRequest getRequest() {
return (HttpServletRequest) FacesContext.getCurrentInstance()
.getExternalContext().getRequest();
}
public User getUser() {
if (user == null) {
user = new User();
}
return user;
}
public void setUser(User user) {
this.user = user;
}
public List<User> getUserList() {
if (userList == null) {
userList = userEJB.findAll();
}
return userList;
}
public void setUserList(List<User> userList) {
this.userList = userList;
}
}
CampMB
#ManagedBean
#ViewScoped
public class CampMB extends AbstractMB implements Serializable {
private static final long serialVersionUID = 1L;
#ManagedProperty("#{userMB}")
private UserMB userMB;
public UserMB getUserMB() {
return userMB;
}
public void setUserMB(UserMB userMB) {
this.userMB = userMB;
}
private User user;
private Camp camp;
private List<CampDTO> listCamp;
#EJB
private CampEJB campEJB;
#EJB
private MemberEJB memberEJB;
#EJB
private CodeValueEJB codeEJB;
TimeZone timeZone = TimeZone.getDefault();
public TimeZone getTimeZone() {
return timeZone;
}
public void setTimeZone(TimeZone timeZone) {
this.timeZone = timeZone;
}
public List<CampDTO> getListCamp() {
Map<String, Object> sessionMap = FacesContext.getCurrentInstance().getExternalContext().getSessionMap();
UserMB managedBean = (UserMB) sessionMap.get("userMB");
System.out.println("test use==" + managedBean.getUser().getId());
System.err.println("Session"+getUserMB().getUser().getId());
if (listCamp == null) {
listCamp = new ArrayList<CampDTO>();
}
listCamp = ConvertUtils.convertCampToDTO(campEJB.findAll());
return listCamp;
}
public void setListCamp(List<CampDTO> listCamp) {
this.listCamp = listCamp;
}
public User getUser() {
if (user == null) {
user = new User();
}
return user;
}
public void setUser(User user) {
this.user = user;
}
}
I am trying different techniques getting from search but no one works for me?
Is there any configuration for it or how to set/get session bean properly.