NullPoint Error shows up in The Java EE 7 Tutorial

Question

I am reading The Java EE 7 Tutorial from http://docs.oracle.com/javaee/7/tutorial/doc/jsf-facelets005.htm#GIQZR
After I typed the example code in the chapter 8.5 Composite Components in my IDE and run the example on GlassFish4.0, I got an error.
java.lang.NullPointerException
  at java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:1078)
  at com.sun.faces.util.Cache.get(Cache.java:116)
  at com.sun.faces.application.view.FaceletViewHandlingStrategy.getComponentMetadata(FaceletViewHandlingStrategy.java:237)
  at com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:951)
  at javax.faces.application.ApplicationWrapper.createComponent(ApplicationWrapper.java:648)
Then I check the older version of this tutorial, I found a difference in email.xhtml code. The namespace has been changed from Java EE 7. After I changed the namespace back to JavaEE 6 version, it works.
Java EE 7
xmlns:composite="http://xmlns.jcp.org/jsf/composite"
Java EE 6
xmlns:composite="http://java.sun.com/jsf/composite"
Someone on the StackOverflow told me that this may caused by Glassfish has attempted to download a schema corresponding to one of those namespaces, and received a response that it can't handle. I don't know whether is the real root cause. Is there anyone has the same problem?

Answer 1

The example from 30. august 2013 (tut-install/examples/web/jsf/compositecomponentexample/) is with the old namespace xmlns:composite="http://java.sun.com/jsf/composite"
But the namespace xmlns:composite="http://xmlns.jcp.org/jsf/composite" is also ok. Works with RI 2.2.4 on Tomcat.