private void throwOnWrongStartCode(CloseRegionRequest request) throws ServiceException {
    if (!request.hasServerStartCode()) {
      LOG.warn("CloseRegionRequest for {} does not have a start code", request.getRegion());
      return;
    }
    throwOnWrongStartCode(request.getServerStartCode());
  }
Get some information of the region server.
@param controller the RPC controller
@param request    the request
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java