ahmetb/kubectx · error

failed to get current context: %w

Error message

failed to get current context: %w

What it means

clearNamespace wraps the error from kc.GetCurrentContext() as "failed to get current context: %w". This occurs when the kubeconfig library cannot resolve the current context reference from the parsed config, typically due to internal inconsistencies in the config structure.

Source

Thrown at cmd/kubens/unset.go:47

func (_ UnsetOp) Run(_, stderr io.Writer) error {
	kc := new(kubeconfig.Kubeconfig).WithLoader(kubeconfig.DefaultLoader)
	defer kc.Close()
	if err := kc.Parse(); err != nil {
		return fmt.Errorf("kubeconfig error: %w", err)
	}

	ns, err := clearNamespace(kc)
	if err != nil {
		return err
	}
	err = printer.Success(stderr, "Active namespace is \"%s\".", printer.SuccessColor.Sprint(ns))
	return err
}

func clearNamespace(kc *kubeconfig.Kubeconfig) (string, error) {
	ctx, err := kc.GetCurrentContext()
	if err != nil {
		return "", fmt.Errorf("failed to get current context: %w", err)
	}
	ns := "default"
	if ctx == "" {
		return "", errors.New("current-context is not set")
	}

	if err := kc.SetNamespace(ctx, ns); err != nil {
		return "", fmt.Errorf("failed to clear namespace: %w", err)
	}
	if err := kc.Save(); err != nil {
		return "", fmt.Errorf("failed to save kubeconfig file: %w", err)
	}
	return ns, nil
}

View on GitHub (pinned to 12ad6fb22e)

Solutions

1. Set a valid current context: kubectl config use-context <name> before running unset.
2. Ensure the kubeconfig has a contexts list with at least one valid entry.
3. Validate the file structure with kubectl config view and fix missing sections.
4. Run the command with the correct KUBECONFIG env var pointing at a complete file.

// Go: ensure a current context resolves before calling unset
if os.Getenv("KUBECONFIG") == "" {
	if _, err := os.Stat(filepath.Join(os.Getenv("HOME"), ".kube", "config")); err != nil {
		return fmt.Errorf("no kubeconfig found at ~/.kube/config")
	}
}
// then: kubectl config current-context must succeed

if err := unsetOp.Run(os.Args, os.Stderr); err != nil {
	if strings.Contains(err.Error(), "failed to get current context") {
		fmt.Fprintln(os.Stderr, "Set a valid current context first: kubectl config use-context <name>")
	}
	return err
}

When it happens

Trigger: kc.GetCurrentContext() returning an error (not merely an empty string) while clearNamespace runs during kubens unset; e.g. the parsed kubeconfig lacks the expected context/current-context structure that the library expects.

Common situations: A hand-crafted or tool-generated kubeconfig missing a valid current-context entry or contexts section; corrupted file after concurrent edits by multiple tools.

Related errors

• failed to clear namespace: %w
• context with name %q not found (errors in files: %w)
• context with name %q not found
• kubeconfig error: %w
• failed to get current context: %w

AI-assisted analysis of ahmetb/kubectx@12ad6fb22e (2026-09-02). Data as JSON: /api/errors/901d15ceca4068d5. Report an issue: GitHub.