grafana/k6 · error

%q is not a valid key=value metadata

Error message

%q is not a valid key=value metadata

What it means

Error "%q is not a valid key=value metadata" thrown in grafana/k6.

Source

Thrown at internal/js/modules/k6/browser/browser/registry.go:620

	defer r.mu.Unlock()

	return len(r.m)
}

func parseTracesMetadata(envLookup env.LookupFunc) (map[string]string, error) {
	var (
		ok bool
		v  string
		m  = make(map[string]string)
	)
	if v, ok = envLookup(env.TracesMetadata); !ok {
		return m, nil
	}

	for elem := range strings.SplitSeq(v, ",") {
		kv := strings.Split(elem, "=")
		if len(kv) != 2 {
			return nil, fmt.Errorf("%q is not a valid key=value metadata", elem)
		}
		m[kv[0]] = kv[1]
	}

	return m, nil
}

type taskQueueRegistry struct {
	vu k6modules.VU

	tqMu sync.Mutex
	tq   map[string]*taskqueue.TaskQueue
}

func newTaskQueueRegistry(vu k6modules.VU) *taskQueueRegistry {
	return &taskQueueRegistry{
		vu:   vu,
		tqMu: sync.Mutex{},

View on GitHub (pinned to 93accf6570)

When it happens

Trigger: Thrown at internal/js/modules/k6/browser/browser/registry.go:620 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of grafana/k6@93accf6570 (2026-08-15). Data as JSON: /api/errors/e9dd71652bf14b56. Report an issue: GitHub.