// BaseRichSpout @Override public void open(Map map, TopologyContext tc, SpoutOutputCollector collector) { super.open(map, tc, collector); if (_harmonizerSyncedSpoutName != null && _zookeeperhost != null) { _scHarmonizer = new SignalClient(_zookeeperhost, _harmonizerSyncedSpoutName); _scHarmonizer.start(); } }