grafana/k6 · error

invalid timeout value: %w

Error message

invalid timeout value: %w

What it means

Also in parseRequest's params loop: the timeout value given in the request params could not be converted/validated as a valid duration, so the request setup fails. The user supplied a timeout of the wrong type or format in the params argument to an http method.

Source

Thrown at js/modules/k6/http/request.go:402

					algo = strings.TrimSpace(algo)
					result.Compressions[index], err = httpext.CompressionTypeString(algo)
					if err != nil {
						return nil, fmt.Errorf("unknown compression algorithm %s, supported algorithms are %s",
							algo, httpext.CompressionTypeValues())
					}
				}
			case "redirects":
				result.Redirects = null.IntFrom(params.Get(k).ToInteger())
			case "tags":
				if err := common.ApplyCustomUserTags(rt, &result.TagsAndMeta, params.Get(k)); err != nil {
					return nil, fmt.Errorf("invalid HTTP request metric tags: %w", err)
				}
			case "auth":
				result.Auth = params.Get(k).String()
			case "timeout":
				t, err := types.GetDurationValue(params.Get(k).Export())
				if err != nil {
					return nil, fmt.Errorf("invalid timeout value: %w", err)
				}
				result.Timeout = t
			case "throw":
				result.Throw = params.Get(k).ToBoolean()
			case "responseType":
				responseType, err := httpext.ResponseTypeString(params.Get(k).String())
				if err != nil {
					return nil, err
				}
				result.ResponseType = responseType
			case "responseCallback":
				v := params.Get(k).Export()
				if v == nil {
					result.ResponseCallback = nil
				} else if c, ok := v.(*expectedStatuses); ok {
					result.ResponseCallback = c.match
				} else {
					return nil, fmt.Errorf("unsupported responseCallback")

View on GitHub (pinned to 01ffac6f24)

Solutions

1. Use a valid Go duration string, e.g. timeout: '30s' or '2m'
2. Check for missing unit suffixes (bare numbers are invalid)

When it happens

Trigger: Thrown at js/modules/k6/http/request.go:402 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Timeouts: ETIMEDOUT, deadlines, and hung requests — what actually expires when a request times out.

AI-assisted analysis of grafana/k6@01ffac6f24 (2026-08-18). Data as JSON: /api/errors/48f5d19084b73909. Report an issue: GitHub.