@Override
    public void onFinished(ISourceHandle sourceHandle) {
      if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("[ScHListenerOnFinish]");
      }
    }
Listen to the state changes of a source handle of pipeline. Since we register nothing in the
exchangeManager, so we don't need to remove it too.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/exchange/MPPDataExchangeManager.java