@Override
  // priority for all RegionServerStatusProtos rpc's are set HIGH_QOS in
  // MasterAnnotationReadingPriorityFunction itself
  public GetLastFlushedSequenceIdResponse getLastFlushedSequenceId(RpcController controller,
    GetLastFlushedSequenceIdRequest request) throws ServiceException {
    try {
      server.checkServiceStarted();
    } catch (IOException ioe) {
      throw new ServiceException(ioe);
    }
    byte[] encodedRegionName = request.getRegionName().toByteArray();
    RegionStoreSequenceIds ids =
      server.getServerManager().getLastFlushedSequenceId(encodedRegionName);
    return ResponseConverter.buildGetLastFlushedSequenceIdResponse(ids);
  }
Returns list of blocking services and their security info classes that this server supports
hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java