final String aliasConfigDirPath = getResourcePath(indexConfigPath, fessConfig.getFesenType(), "/" + configIndex + "/alias");
        try {
            final File aliasConfigDir = ResourceUtil.getResourceAsFile(aliasConfigDirPath);
            if (aliasConfigDir.isDirectory()) {
                final IndicesAliasesRequestBuilder builder = client.admin().indices().prepareAliases();