// Create a custom hook that simulates class not found scenario
        FessCurtainFinallyHook customHook = new FessCurtainFinallyHook() {
            @Override
            public void hook(final FwAssistantDirector assistantDirector) {
                // Use reflection to call private method
                try {
                    Method method = FessCurtainFinallyHook.class.getDeclaredMethod("shutdownCommonsHttpClient");