return "/jsp/PortletError/maintenance";
}
IUserInstance userInstance = this.userInstanceManager.getUserInstance(httpRequest);
if(hasAdminPrivileges(userInstance)) {
IPortletWindow window = this.portletWindowRegistry.getPortletWindow(httpRequest, currentFailedPortletWindowId);
window.setRenderParameters(new ParameterMap());
IPortalUrlBuilder adminRetryUrl = this.portalUrlProvider.getPortalUrlBuilderByPortletWindow(httpRequest, currentFailedPortletWindowId, UrlType.RENDER);
model.addAttribute("adminRetryUrl", adminRetryUrl.getUrlString());
final IPortletWindow portletWindow = portletWindowRegistry.getPortletWindow(httpRequest, currentFailedPortletWindowId);
final IPortletEntity parentPortletEntity = portletWindow.getPortletEntity();
final IPortletDefinition parentPortletDefinition = parentPortletEntity.getPortletDefinition();
model.addAttribute("channelDefinition", parentPortletDefinition);
StringWriter stackTraceWriter = new StringWriter();
cause.printStackTrace(new PrintWriter(stackTraceWriter));