tailscale/tailscale · error

remote server %s returned HTTP status %d

Error message

remote server %s returned HTTP status %d

What it means

Error "remote server %s returned HTTP status %d" thrown in tailscale/tailscale.

Source

Thrown at cmd/stunstamp/stunstamp.go:871

	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
}

func remoteWriteTimeSeries(client *remoteWriteClient, tsCh chan []prompb.TimeSeries) {
	bo := backoff.NewBackoff("remote-write", log.Printf, time.Second*30)
	// writeErr may contribute to bo's backoff schedule across tsCh read ops,
	// i.e. if an unrecoverable error occurs for client.write(ctx, A), that
	// should be accounted against bo prior to attempting to
	// client.write(ctx, B).
	var writeErr error
	for ts := range tsCh {
		for {
			bo.BackOff(context.Background(), writeErr)
			reqCtx, cancel := context.WithTimeout(context.Background(), time.Second*30)

View on GitHub (pinned to cfe32b8be6)

When it happens

Trigger: Thrown at cmd/stunstamp/stunstamp.go:871 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/1c9ba0fd43ae5b49. Report an issue: GitHub.