code: function failfast(code, tracer, serverId, msg, opts, cb) {
      logger.error('rpc failed with error, remote server: %s, msg: %j, error code: %s', serverId, msg, code);
      utils.invokeCallback(cb, new Error(`rpc failed with error code: ${code}`));
  }
docs: Failfast rpc failure process. This will ignore error in rpc client.
  
  @param code {Number} error code number.
  @param tracer {Object} current rpc tracer.
  @param serverId {String} rpc remote target server id.
  @param msg {Object} rpc message.
  @param opts {Object} rpc client options.
  @param cb {Function} user rpc callback.
  
  @api private