@Override
  @QosPriority(priority = HConstants.ADMIN_QOS)
  public UpdateConfigurationResponse updateConfiguration(RpcController controller,
    UpdateConfigurationRequest request) throws ServiceException {
    try {
      requirePermission("updateConfiguration", Permission.Action.ADMIN);
      this.server.updateConfiguration();
    } catch (Exception e) {
      throw new ServiceException(e);
    }
    return UpdateConfigurationResponse.getDefaultInstance();
  }
Check if an OOME and, if so, abort immediately to avoid creating more objects.
@return True if we OOME'd and are aborting.
hbase-server/src/main/java/org/apache/hadoop/hbase/HBaseRpcServicesBase.java