final SearchEngineClient client = ComponentUtil.getSearchEngineClient();
        for (final String index : configIndices) {
            final String oldIndex = "." + index;
            if (client.existsIndex(oldIndex) && client.existsIndex(index)) {
                logger.info("Copying from {} to {}", oldIndex, index);
                if (!client.reindex(oldIndex, index, false)) {

            return true;
        } catch (final Exception e) {
            logger.warn("Failed to add {} to {}", id, index, e);
        }
        return false;
    }

    public static boolean existsIndex(final IndicesAdminClient indicesClient, final String index, final boolean expandWildcardsOpen,
            final boolean expandWildcardsClosed) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        try {

                final boolean isFessIndex = DOC_INDEX.equals(configIndex);
                final String indexName;
                if (isFessIndex) {
                    final boolean exists = existsIndex(fessConfig.getIndexDocumentUpdateIndex());
                    if (!exists) {
                        indexName = generateNewIndexName(configIndex);
                        createIndex(configIndex, indexName);