The XPathFactory provided by Sun in the JDK mentions it's not threadsafe, see: http://java.sun.com/javase/6/docs/api/javax/xml/xpath/XPathFactory.html. Though it is ...
|javax.xml.xpath.XPathFactory.newInstance()|Get a new XPathFactory instance using the default object model,#DEFAULT_OBJECT_MODE |javax.xml.xpath.XPathFactory.newInstance(String)|Get a new XPathFactory ...