XTLS/Xray-core · error

empty selector list

Error message

empty selector list

What it means

Error "empty selector list" thrown in XTLS/Xray-core.

Source

Thrown at infra/conf/router.go:34

type StrategyConfig struct {
	Type     string           `json:"type"`
	Settings *json.RawMessage `json:"settings"`
}

type BalancingRule struct {
	Tag         string         `json:"tag"`
	Selectors   StringList     `json:"selector"`
	Strategy    StrategyConfig `json:"strategy"`
	FallbackTag string         `json:"fallbackTag"`
}

// Build builds the balancing rule
func (r *BalancingRule) Build() (*router.BalancingRule, error) {
	if r.Tag == "" {
		return nil, errors.New("empty balancer tag")
	}
	if len(r.Selectors) == 0 {
		return nil, errors.New("empty selector list")
	}

	r.Strategy.Type = strings.ToLower(r.Strategy.Type)
	switch r.Strategy.Type {
	case "":
		r.Strategy.Type = strategyRandom
	case strategyRandom, strategyLeastLoad, strategyLeastPing, strategyRoundRobin:
	default:
		return nil, errors.New("unknown balancing strategy: " + r.Strategy.Type)
	}

	settings := []byte("{}")
	if r.Strategy.Settings != nil {
		settings = ([]byte)(*r.Strategy.Settings)
	}
	rawConfig, err := strategyConfigLoader.LoadWithID(settings, r.Strategy.Type)
	if err != nil {
		return nil, errors.New("failed to parse to strategy config.").Base(err)

View on GitHub (pinned to 7d214f8b09)

When it happens

Trigger: Thrown at infra/conf/router.go:34 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of XTLS/Xray-core@7d214f8b09 (2026-08-15). Data as JSON: /api/errors/314a6bef17347b07. Report an issue: GitHub.