JuliusBrussee/caveman · error

cachebench: unsupported replay base URL provider %q

Error message

cachebench: unsupported replay base URL provider %q

What it means

Error "cachebench: unsupported replay base URL provider %q" thrown in JuliusBrussee/caveman.

Source

Thrown at cacheengine/cachebench/replay_http.go:81

	if limit < 1 || limit > 256<<20 {
		return nil, errors.New("cachebench: replay response limit must be between 1 byte and 256 MiB")
	}
	requestTimeout := config.RequestTimeout
	if requestTimeout == 0 {
		requestTimeout = 2 * time.Minute
	}
	if requestTimeout < time.Second || requestTimeout > time.Hour {
		return nil, errors.New("cachebench: replay request timeout must be between 1 second and 1 hour")
	}
	bases := map[string]string{
		"openai":    "https://api.openai.com",
		"anthropic": "https://api.anthropic.com",
		"gemini":    "https://generativelanguage.googleapis.com",
	}
	for provider, value := range config.BaseURLs {
		provider = strings.ToLower(strings.TrimSpace(provider))
		if provider != "openai" && provider != "anthropic" && provider != "gemini" && provider != "bedrock" {
			return nil, fmt.Errorf("cachebench: unsupported replay base URL provider %q", provider)
		}
		bases[provider] = value
	}
	parsed := make(map[string]*url.URL, len(bases))
	for provider, value := range bases {
		base, err := validateReplayBaseURL(value, config.AllowInsecureLoopback)
		if err != nil {
			return nil, fmt.Errorf("cachebench: %s replay base URL: %w", provider, err)
		}
		parsed[provider] = base
	}
	client := config.Client
	if client == nil {
		client = &http.Client{
			Timeout: requestTimeout,
			Transport: &http.Transport{
				Proxy:                 nil,
				DialContext:           (&net.Dialer{Timeout: 10 * time.Second, KeepAlive: 30 * time.Second}).DialContext,

View on GitHub (pinned to 27d5a3981a)

Solutions

1. Use a supported replay base URL provider.

When it happens

Trigger: Thrown at cacheengine/cachebench/replay_http.go:81 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of JuliusBrussee/caveman@27d5a3981a (2026-08-15). Data as JSON: /api/errors/bc97260ae3727a8c. Report an issue: GitHub.