go-redis/redis · error

both LibName and LibVer cannot be set at the same time

Error message

both LibName and LibVer cannot be set at the same time

What it means

Error "both LibName and LibVer cannot be set at the same time" thrown in go-redis/redis.

Source

Thrown at commands.go:351

		panic(err.Error())
	}

	var cmd *StatusCmd
	if info.LibName != nil {
		libName := fmt.Sprintf("go-redis(%s,%s)", *info.LibName, internal.ReplaceSpaces(runtime.Version()))
		cmd = NewStatusCmd(ctx, "client", "setinfo", "LIB-NAME", libName)
	} else {
		cmd = NewStatusCmd(ctx, "client", "setinfo", "LIB-VER", *info.LibVer)
	}

	_ = c(ctx, cmd)
	return cmd
}

// Validate checks if only one field in the struct is non-nil.
func (info LibraryInfo) Validate() error {
	if info.LibName != nil && info.LibVer != nil {
		return errors.New("both LibName and LibVer cannot be set at the same time")
	}
	if info.LibName == nil && info.LibVer == nil {
		return errors.New("at least one of LibName and LibVer should be set")
	}
	return nil
}

// Hello sets the resp protocol used.
func (c statefulCmdable) Hello(ctx context.Context,
	ver int, username, password, clientName string,
) *MapStringInterfaceCmd {
	args := make([]interface{}, 0, 7)
	args = append(args, "hello", ver)
	if password != "" {
		if username != "" {
			args = append(args, "auth", username, password)
		} else {
			args = append(args, "auth", "default", password)

View on GitHub (pinned to 36d97525cd)

Solutions

1. Set either LibName or LibVer on the library config, not both
2. Split into two calls if you need to send both name and version information

When it happens

Trigger: Thrown at commands.go:351 when the library encounters an invalid state.

Common situations: Validate the options struct at construction time so mutually exclusive fields cannot both be populated.

AI-assisted analysis of go-redis/redis@36d97525cd (2026-08-06). Data as JSON: /data/errors/4f8bc7f0b2ad11eb.json. Report an issue: GitHub.