See Description Note of parent CR 5041845.
            
- backport of
- 
                    JDK-5041845 XMLGregorianCalendar.isValid() throws NPE if month==2 and year is undefined -           
- Resolved
 
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        JDK-5041845
        XMLGregorianCalendar.isValid() throws NPE if month==2 and year is undefined
    
