@Override
  public CoprocessorServiceResponse execRegionServerService(RpcController controller,
    CoprocessorServiceRequest request) throws ServiceException {
    rpcPreCheck("execRegionServerService");
    return server.execRegionServerService(controller, request);
  }
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