grafana/k6 · error

failed to parse the http proxy URL: %w

Error message

failed to parse the http proxy URL: %w

What it means

MakeClient for the InfluxDB output wraps the URL parse error when the K6_INFLUXDB_PROXY option is set but its value is not a valid URL (url.Parse failed). It indicates malformed proxy configuration, not a problem with the InfluxDB server address itself.

Source

Thrown at internal/output/influxdb/util.go:34

		return client.NewUDPClient(client.UDPConfig{
			Addr:        after,
			PayloadSize: int(conf.PayloadSize.Int64),
		})
	}
	if conf.Addr.String == "" {
		conf.Addr = null.StringFrom("http://localhost:8086")
	}
	clientHTTPConfig := client.HTTPConfig{
		Addr:               conf.Addr.String,
		Username:           conf.Username.String,
		Password:           conf.Password.String,
		UserAgent:          "k6",
		InsecureSkipVerify: conf.Insecure.Bool,
	}
	if conf.Proxy.Valid {
		parsedProxyURL, err := url.Parse(conf.Proxy.String)
		if err != nil {
			return nil, fmt.Errorf("failed to parse the http proxy URL: %w", err)
		}
		clientHTTPConfig.Proxy = http.ProxyURL(parsedProxyURL)
	}
	return client.NewHTTPClient(clientHTTPConfig)
}

// MakeBatchConfig returns a new InfluxDB BatchPointsConfig based on the given
func MakeBatchConfig(conf Config) client.BatchPointsConfig {
	if !conf.DB.Valid || conf.DB.String == "" {
		conf.DB = null.StringFrom("k6")
	}
	return client.BatchPointsConfig{
		Precision:        conf.Precision.String,
		Database:         conf.DB.String,
		RetentionPolicy:  conf.Retention.String,
		WriteConsistency: conf.Consistency.String,
	}
}

View on GitHub (pinned to 01ffac6f24)

Solutions

1. Correct the proxy URL to a valid form such as http://proxyhost:3128
2. Remove K6_INFLUXDB_PROXY if no proxy is needed

When it happens

Trigger: Thrown at internal/output/influxdb/util.go:34 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of grafana/k6@01ffac6f24 (2026-08-18). Data as JSON: /api/errors/a7022e97b74f9aa5. Report an issue: GitHub.