JuliusBrussee/caveman · error

cachebench: no providers selected

Error message

cachebench: no providers selected

What it means

Error "cachebench: no providers selected" thrown in JuliusBrussee/caveman.

Source

Thrown at cacheengine/cmd/cachebench/main.go:185

	var providers []cachebench.ProviderConfig
	for _, name := range requested {
		name = strings.TrimSpace(name)
		provider, ok := available[name]
		if !ok || name == "all" {
			valid := make([]string, 0, len(available))
			for candidate := range available {
				valid = append(valid, candidate)
			}
			sort.Strings(valid)
			return nil, fmt.Errorf("cachebench: unknown provider %q; valid: %s", name, strings.Join(valid, ","))
		}
		if !seen[name] {
			seen[name] = true
			providers = append(providers, provider)
		}
	}
	if len(providers) == 0 {
		return nil, fmt.Errorf("cachebench: no providers selected")
	}
	return providers, nil
}

func writeTraces(path string, providers []cachebench.ProviderConfig, scenario cachebench.Scenario) error {
	file, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o600)
	if err != nil {
		return err
	}
	defer file.Close()
	for _, provider := range providers {
		trace, err := cachebench.GenerateTrace(provider, scenario)
		if err != nil {
			return err
		}
		if err := cachebench.WriteTraceJSONL(file, trace); err != nil {
			return err
		}

View on GitHub (pinned to 27d5a3981a)

Solutions

1. Select at least one provider.

When it happens

Trigger: Thrown at cacheengine/cmd/cachebench/main.go:185 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/d9378d1792b5e402. Report an issue: GitHub.