default:
		return fmt.Errorf("%s: unknown version: %d", ri.JobType, binary.LittleEndian.Uint16(data[2:4]))
	}

	ri.mu.Lock()
	defer ri.mu.Unlock()

	// OK, parse data.
	if _, err = ri.UnmarshalMsg(data[4:]); err != nil {
		return err
	}

	switch ri.Version {
	case batchReplVersionV1:
	default:
		return fmt.Errorf("unexpected batch %s meta version: %d", ri.JobType, ri.Version)
	}