// Create additional update index (making 2 total)
        final String updateAlias = suggester.getIndex() + ".update";
        final String extraIndexName = suggester.getIndex() + ".extra";

        client.admin().indices().prepareCreate(extraIndexName).execute().actionGet();
        client.admin().indices().prepareAliases().addAlias(extraIndexName, updateAlias).execute().actionGet();
        Thread.sleep(100);

        try {
            final String updateAlias = getUpdateAlias(index);
            final List<String> updateIndices = getIndicesForAlias(updateAlias);
            if (updateIndices.size() != EXPECTED_INDEX_COUNT) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Unexpected number of update indices: expected={}, actual={}, updateAlias={}, indices={}",

                searchEngineClient.addMapping(docIndex, "doc", toIndex);
                if (searchEngineClient.copyDocIndex(fromIndex, toIndex, replaceAliases) && replaceAliases
                        && !searchEngineClient.updateAlias(toIndex)) {
                    logger.warn("Failed to update aliases for {} and {}", fromIndex, toIndex);
                }
            }, e -> logger.warn("Failed to reindex from {} to {}", fromIndex, toIndex, e)));