assertNotSame(exception1, exception2);
        assertEquals(exception1.getActionClass(), exception2.getActionClass());
        assertSame(RootAction.class, exception1.getActionClass());
        assertSame(RootAction.class, exception2.getActionClass());
    }

    @Test
    public void test_synchronizedFillInStackTrace() {

    }

    /**
     * Gets the action class associated with this exception.
     *
     * @return the action class that requires specific user roles
     */
    public Class<? extends RootAction> getActionClass() {
        return actionClass;
    }

    /**
     * Overrides fillInStackTrace to return null for performance optimization.
     * This prevents stack trace generation for this exception type.
     *

     */
    @Override
    protected void checkPermission(final LoginHandlingResource resource) throws LoginRequiredException {
        if (FessAdminAction.class.isAssignableFrom(resource.getActionClass())) {
            getSavedUserBean().ifPresent(user -> {
                if (user.hasRoles(fessConfig.getAuthenticationAdminRolesAsArray())) {
                    return;
                }

            return superGodHandPrologue(runtime);
        } catch (final UserRoleLoginException e) {
            activityHelper.accessDenied(getUserBean(), runtime.getRequestPath());
            return redirect(e.getActionClass());
        }
    }

    /**
     * Calls the parent's godHandPrologue method.
     * <p>
     * This method exists to allow subclasses or tests to override