if (numberOfReplicas > 0) {
                    source = "{\"settings\":{\"index\":{\"number_of_shards\":" + numberOfShards
                            + ",\"number_of_replicas\":0,\"auto_expand_replicas\":\"0-" + numberOfReplicas + "\"}}}";
                } else {
                    source = "{\"settings\":{\"index\":{\"number_of_shards\":" + numberOfShards + ",\"number_of_replicas\":"

indexer.language.detect.length=1000
indexer.max.result.window.size=10000
indexer.max.search.doc.size=50000

# index setting
index.codec=default
index.number_of_shards=5
index.auto_expand_replicas=0-1
index.id.digest.algorithm=SHA-512
index.user.initial_password=admin

# field names
index.field.favorite_count=favorite_count
index.field.click_count=click_count
index.field.config_id=config_id

                .replaceAll(Pattern.quote("${fess.index.number_of_shards}"), numberOfShards)//
                .replaceAll(Pattern.quote("${fess.index.auto_expand_replicas}"), autoExpandReplicas);
        for (final UnaryOperator<String> rule : docSettingRewriteRuleList) {
            source = rule.apply(source);
        }
        return source;
    }

    /** The key of the configuration. e.g. 5 */
    String INDEX_number_of_shards = "index.number_of_shards";

    /** The key of the configuration. e.g. 0-1 */
    String INDEX_auto_expand_replicas = "index.auto_expand_replicas";

    /** The key of the configuration. e.g. SHA-512 */
    String INDEX_ID_DIGEST_ALGORITHM = "index.id.digest.algorithm";

    /** The key of the configuration. e.g. admin */

            final String autoExpandReplicas) {
        final String docIndex = "fess";
        final String fromIndex = fessConfig.getIndexDocumentUpdateIndex();
        final String toIndex = docIndex + "." + new SimpleDateFormat(Constants.DOCUMENT_INDEX_SUFFIX_PATTERN).format(new Date());
        if (searchEngineClient.createIndex(docIndex, toIndex, numberOfShards, autoExpandReplicas, resetDictionaries)) {