[xwiki-devs] onEvent does not save the document

Hi community, I have a listener on DocumentUpdateEvent List<Event> getEvents() { return Arrays.asList(new DocumentUpdateEvent()) } void onEvent(Event event, Object source, Object data) { println "onEvent start !" def obj = source.getObject("Revision.RevisionClass") source.setComment('this is listener comment') println obj.getName() obj.set("approvedRev", '1.1', data) println "onEvent end" } I'm sure onEvent is executed but the document is not saved. The same problem with DocumentUpdatedEvent when i added saveDocument, i got stackoverflow. I tried on XWIKI 4.4 and 5.4.5, with no success Thanks in advance :)