private void runShippedCallback(RegionScannerHolder rsh) throws ServiceException {
    assert rsh.shippedCallback != null;
    try {
      rsh.shippedCallback.run();
    } catch (IOException ioe) {
      throw new ServiceException(ioe);
    }
  }
Scan data in a table.
@param controller the RPC controller
@param request    the scan request
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java