}
        } catch (final Exception e) {
            logger.warn("Failed to register {}", filePath, e);
        }
        return false;
    }

    public static boolean createAlias(final IndicesAdminClient indicesClient, final String indexConfigPath, final String indexName,
            final String aliasName) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

                    if (!exists) {
                        indexName = generateNewIndexName(configIndex);
                        createIndex(configIndex, indexName);
                        createAlias(configIndex, indexName);
                    } else {
                        client.admin().cluster().prepareHealth(fessConfig.getIndexDocumentUpdateIndex()).setWaitForYellowStatus().execute()