client.admin().indices().prepareAliases().addAlias(indexName, getUpdateAlias(index));
            for (final String prevIndex : prevIndices) {
                aliasesRequestBuilder.removeAlias(prevIndex, getUpdateAlias(index));
            }
            aliasesRequestBuilder.execute().actionGet(suggestSettings.getIndicesTimeout());
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {

        for (final String index : updateIndices) {
            builder.removeAlias(index, updateAlias);
        }
        for (final String index : searchIndices) {
            builder.removeAlias(index, searchAlias);
        }
        final AcknowledgedResponse response = builder.execute().actionGet(fessConfig.getIndexIndicesTimeout());