PermGen Space problem???

[Julien Martin]

Hello,

I get the following error and I have two question regarding it:

1. What is the PermGen Space error. Is it to do with memory?
2. What is the difference between "exception" and "root cause"?

Thanks in advance,

Julien.

exception
 
javax.servlet.ServletException: PermGen space
javax.faces.webapp.FacesServlet.service(FacesServlet.java:121)
org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122)
 
root cause
 
javax.faces.FacesException: PermGen space
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421)
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122)
 

[Bagwan Mehrat]

Originally posted by Julien Martin:

1. What is the PermGen Space error. Is it to do with memory?
2. What is the difference between "exception" and "root cause"?

I noticed the PermGen space error happens in JBoss after I've hot deployed an application many times without restarting JBoss. There must be a memory leak in the deployment routine. If that's the case, then it's something that probably won't affect a production machine, but it's annoying to a software developer.

I assume that the exception is the ServletException, and the root cause is the Exception that is returned by ServletException.getRootCause()?