I use JSF viewscope for my managedbean. I call the managed bean in a html view.
When the page is refresh, there is a new managed bean allowed and the old one stay in the memory.
If I refresh and refresh and refresh... I have got a huge number of the managed beans in the memory.
I try to run garbage collector, nothing append.
The managed beans stay until the session expired. At the end of session, by user action or timeout, the managed bean are freed.
I only have this problem when I stay on the same page (refresh on the browser -F5- or redirection link without JSP tag or java code redirection). When I change page, there is only one managed bean freed (the last one). The others stay in the memory. It seme to work with JSP tag, the managed bean are freed after the redirection.
Second Bug : Some time I arrived in strange case : I have some managed bean not freed in memory, I use JSP tag redirect (may 3/4 times) and the system do Predestroy / PostConstruct / Predestroy... And after that every redirection do PostConstruct / Predestroy for not JSP tag or java redirection, Predestroy / PostConstruct / Predestroy for JSP tag. In the memory a managed bean not freed is freed after that. I realy don't know what is realy the case reproduce this, but it do multiple time.
Do somebody have some solution for this problems ? I see a post look like problem here and I report a bug on java.net
Configuration : Java EE 7 / glassfish 4
AViewscope.java :
package com.btm.viewscopetest;
import java.io.IOException;
import java.io.Serializable;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
@ManagedBean
@ViewScoped
public class AViewscope implements Serializable {
@PostConstruct
public void postConstruct() {
System.out.println("PostConstruct");
}
@PreDestroy
public void preDestroy() {
System.out.println("PreDestroy");
}
public AViewscope() {
}
public String getSomething() {
return "Something";
}
public void redirect() throws IOException {
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
externalContext.redirect("apage.xhtml");
}
}
apage.xhtml :
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html">
<head>
<title>A page</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
</head>
<body>
<h:form>
<h:outputText value="Get something: #{aViewscope.something}" />
<br/>
<br/>
<h:commandButton value="Stay on this page with java " actionListener="#{aViewscope.redirect}"/>
<br/>
<h:commandButton value="Stay on this page with direct link" action="apage" />
<br/>
<h:commandButton value="Go to another page" action="anotherPage"/>
<br/>
<h:commandLink value="Stay on this page with direct link h tag " action="apage.xhtml" />
<a href="apage.xhtml">Stay on this page with direct link a tag</a>
</h:form>
</body>
</html>
anotherPage.xhtml :
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html">
<head>
<title>Another Page</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
</head>
<body>
<h:form>
<h:commandButton value="Go to another page" action="apage"/>
</h:form>
</body>
</html>
web.xml :
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<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>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>index.xhtml</welcome-file>
</welcome-file-list>
</web-app>
