public function getAdditionalInformation()
    {
        $site = $this->getSite();

        if (is_null($site)) {
            return 'Invalid site configuration for scheduler please re-create the task!';
        }

        $message = 'Site: ' . $site->getLabel();

        /** @var $indexService \ApacheSolrForTypo3\Solr\Domain\Index\IndexService */
        $indexService = $this->getInitializedIndexService($site);
        $failedItemsCount = $indexService->getFailCount();

        if ($failedItemsCount) {
            $message .= ' Failures: ' . $failedItemsCount;
        }

        $message .= ' / Using webroot: ' . htmlspecialchars($this->getWebRoot());

        return $message;
    }