HI everyone:
Today , I use exportDocumentView and session.importXML  method to realize backup and restore data (primary for users and groups) for jackrabbit , however , I found javax.jcr.nodetype.ConstraintViolationException happened when I try to restore data with the method importXML .
Is there any way to backup and restore data in jackrabbit and I don't want to use other tool , can Jackrabbit do it ?