{
  "settings": {
    "index": {
      "codec": "${fess.index.codec}",
      "refresh_interval": "1s",
      "number_of_shards": "${fess.index.number_of_shards}",
      "number_of_replicas": 0,
      "auto_expand_replicas": "${fess.index.auto_expand_replicas}"
    },
    "analysis": {
      "char_filter": {
        "mapping_fa_filter": {
          "type": "mapping",
          "mappings_path": "${fess.dictionary.path}fa/mapping.txt"
        },

     * @param autoExpandReplicas the auto expand replicas setting for the new index
     * @return true if the reindex operation started successfully, false otherwise
     */
    protected boolean startReindex(final boolean replaceAliases, final boolean resetDictionaries, final String numberOfShards,
            final String autoExpandReplicas) {
        final String docIndex = "fess";