glanceapp/glance · warning · errPartialContent

: failed to fetch channels

Error message

%w: failed to fetch %d channels

What it means

Wraps errPartialContent after the twitch-channels widget fetched a list of channels and at least one (but not all) individual channel request failed. The widget still returns the channels that succeeded; the error signals degraded completeness to the partial-content rendering path.

Solutions

1. Check the server logs for the matching 'Failed to fetch Twitch channel' lines to see which login failed and why
2. Remove or fix misspelled/deleted channel logins in the twitch-channels widget config
3. Increase cache-time or reduce the number of channels to avoid rate limiting

// Before configuring, sanity-check each login is a non-empty lowercase string
func validTwitchLogin(l string) bool {
	return l != "" && l == strings.ToLower(l) && !strings.ContainsAny(l, " /\u0000")
}

func isPartialContent(err error) bool { return errors.Is(err, errPartialContent) }

channels, err := widget.getChannels()
if errors.Is(err, errPartialContent) {
    // render the successful channels; log the failed count
    slog.Warn("twitch partial fetch", "err", err)
} else if err != nil {
    return err
}

When it happens

Trigger: One or more channel logins in the channels list fail (rate limit, deleted channel, GQL error) while others succeed, and failed < len(channelLogins). If every channel fails, errNoContent is returned instead.

Common situations: A deleted/renamed Twitch channel left in the config; intermittent 429s from gql.twitch.tv when tracking many channels with a short cache time.

Related errors

• no categories could be retrieved
• unknown operation name
• unmarshalling channel shell
• unmarshalling stream metadata
• : could not fetch data for market(s)

AI-assisted analysis of glanceapp/glance@91324e8de7 (2026-08-15). Data as JSON: /api/errors/d6ad2ceb607f8164. Report an issue: GitHub.

Appendix: source

Thrown at internal/glance/widget-twitch-channels.go:234

	var failed int

	for i := range channels {
		if errs[i] != nil {
			failed++
			slog.Error("Failed to fetch Twitch channel", "channel", channelLogins[i], "error", errs[i])
			continue
		}

		result = append(result, channels[i])
	}

	if failed == len(channelLogins) {
		return result, errNoContent
	}

	if failed > 0 {
		return result, fmt.Errorf("%w: failed to fetch %d channels", errPartialContent, failed)
	}

	return result, nil
}

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