@SuppressWarnings("rawtypes")
private void initMonitor(Map conf) {
final ScheduledExecutorService scheduExec = data.getScheduExec();
// Schedule Nimbus monitor
MonitorRunnable r1 = new MonitorRunnable(data);
int monitor_freq_secs = JStormUtils.parseInt(
conf.get(Config.NIMBUS_MONITOR_FREQ_SECS), 10);
scheduExec.scheduleAtFixedRate(r1, 0, monitor_freq_secs,
TimeUnit.SECONDS);