Received output: [001] java.util.ConcurrentModificationException [002] at java.util.LinkedList$LinkedListItr.checkMod(LinkedList.java:869) [003] at java.util.LinkedList$LinkedListItr.next(LinkedList.java:921) [004] at gnu.xml.transform.Bindings.get(Bindings.java:215) [005] at gnu.xml.xpath.VariableReference.evaluate(VariableReference.java:67) [006] ...