tailscale/tailscale · error

unable to create write request: %w

Error message

unable to create write request: %w

What it means

Error "unable to create write request: %w" thrown in tailscale/tailscale.

Source

Thrown at cmd/stunstamp/stunstamp.go:860

		c: &http.Client{
			Timeout: time.Second * 30,
		},
		url: url,
	}
}

func (r *remoteWriteClient) write(ctx context.Context, ts []prompb.TimeSeries) error {
	wr := &prompb.WriteRequest{
		Timeseries: ts,
	}
	b, err := wr.Marshal()
	if err != nil {
		return fmt.Errorf("unable to marshal write request: %w", err)
	}
	compressed := snappy.Encode(nil, b)
	req, err := http.NewRequestWithContext(ctx, "POST", r.url, bytes.NewReader(compressed))
	if err != nil {
		return fmt.Errorf("unable to create write request: %w", err)
	}
	req.Header.Add("Content-Encoding", "snappy")
	req.Header.Set("Content-Type", "application/x-protobuf")
	req.Header.Set("User-Agent", "stunstamp")
	req.Header.Set("X-Prometheus-Remote-Write-Version", "0.1.0")
	resp, err := r.c.Do(req)
	if err != nil {
		return recoverableErr{fmt.Errorf("error performing write request: %w", err)}
	}
	if resp.StatusCode/100 != 2 {
		err = fmt.Errorf("remote server %s returned HTTP status %d", r.url, resp.StatusCode)
	}
	if resp.StatusCode/100 == 5 || resp.StatusCode == http.StatusTooManyRequests {
		return recoverableErr{err}
	}
	return err
}

View on GitHub (pinned to cfe32b8be6)

When it happens

Trigger: Thrown at cmd/stunstamp/stunstamp.go:860 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of tailscale/tailscale@cfe32b8be6 (2026-08-15). Data as JSON: /api/errors/2d5768cf4fb7f36f. Report an issue: GitHub.