domDb.remove(doc.getAddress());
				public Object start() {					try {						ArrayList nodes = domDb.findKeys(idx);						Value ref;						for (Iterator i = nodes.iterator(); i.hasNext();) {							ref = (Value) i.next();							domDb.removeValue(ref);						}						domDb.flush();					} catch (BTreeException e) {						LOG.warn("error while removing doc", e);					} catch (DBException e) {						LOG.warn("error while removing doc", e);					} catch (IOException e) {						LOG.warn("error while removing doc", e);					}					return null;				}