hashicorp/nomad · error

could not get existing service to stop - %w

Error message

could not get existing service to stop - %w

What it means

Returned by performInstall when WindowsServiceManager.GetService fails to open the already-registered Nomad service prior to stopping it for reinstall. The service exists but its handle could not be obtained.

Source

Thrown at command/windows_service_install.go:142

	}

	c.Ui.Info("Successfully installed nomad Windows service")
	return 0
}

func (c *WindowsServiceInstallCommand) performInstall(m winsvc.WindowsServiceManager, opts *windowsInstallOpts) error {
	// Check if the nomad service has already been
	// registered. If so the service needs to be
	// stopped before proceeding with the install.
	exists, err := m.IsServiceRegistered(winsvc.WINDOWS_SERVICE_NAME)
	if err != nil {
		return fmt.Errorf("unable to check for existing service - %w", err)
	}

	if exists {
		nmdSvc, err := m.GetService(winsvc.WINDOWS_SERVICE_NAME)
		if err != nil {
			return fmt.Errorf("could not get existing service to stop - %w", err)
		}

		// If the service is running and the reinstall
		// option was not set, return an error
		running, err := nmdSvc.IsRunning()
		if err != nil {
			return fmt.Errorf("unable to determine service state - %w", err)
		}
		if running && !opts.reinstall {
			return fmt.Errorf("service is already running. Please run the\ncommand again with -reinstall to stop the service and install.")
		}

		if running {
			c.Ui.Output("  Stopping existing nomad service")
			if err := nmdSvc.Stop(); err != nil {
				return fmt.Errorf("unable to stop existing service - %w", err)
			}
		}

View on GitHub (pinned to 482b49bf1a)

Solutions

1. Re-run from an elevated prompt with sufficient SCM rights
2. Check the service wasn't deleted concurrently
3. Inspect the wrapped OS error for access-denied details

When it happens

Trigger: Thrown at command/windows_service_install.go:142 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hashicorp/nomad@482b49bf1a (2026-09-04). Data as JSON: /api/errors/e894c3ce3ab93a88. Report an issue: GitHub.