final IndicesAliasesRequestBuilder aliasesRequestBuilder =
                    client.admin().indices().prepareAliases().addAlias(indexName, getUpdateAlias(index));
            for (final String prevIndex : prevIndices) {
                aliasesRequestBuilder.removeAlias(prevIndex, getUpdateAlias(index));
            }

            if (aliasConfigFile.exists()) {
                final String source = FileUtil.readUTF8(aliasConfigFile);
                final AcknowledgedResponse response = indicesClient.prepareAliases().addAlias(indexName, aliasName, source).execute()
                        .actionGet(fessConfig.getIndexIndicesTimeout());
                if (response.isAcknowledged()) {

        final String[] searchIndices = response2.indices();

        final IndicesAliasesRequestBuilder builder =
                client.admin().indices().prepareAliases().addAlias(newIndex, updateAlias).addAlias(newIndex, searchAlias);
        for (final String index : updateIndices) {
            builder.removeAlias(index, updateAlias);
        }