private static void init() {
		//initialize htable pool;
		try {
			props = new Properties();
			props.load(new FileReader(new File(
					Reader.class.getResource(CONFIG_FILE).getFile())));
			hbaseconf = HBaseConfiguration.create();
			// set all hbase properties
			Iterator<?> it = props.keySet().iterator();
			while (it.hasNext()) {
				String key = (String)it.next();
				if (key.startsWith("hbase.")) {
					hbaseconf.set((String)key,(String)props.get(key));
				}
			}
			pool = new HTablePool(hbaseconf, INSTANCE_NUM);
		} catch (Exception ex) {
			LOG.error(ex.getMessage(), ex);
		}
	}