@Override
  public IsMasterRunningResponse isMasterRunning(RpcController c, IsMasterRunningRequest req)
    throws ServiceException {
    try {
      server.checkServiceStarted();
      return IsMasterRunningResponse.newBuilder().setIsMasterRunning(!server.isStopped()).build();
    } catch (IOException e) {
      throw new ServiceException(e);
    }
  }
Get list of userspace table names
@param controller Unused (set to null).
@param req        GetTableNamesRequest
hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java