final int threads = fessConfig.getCrawlerHotthreadThreadsAsInteger();
        final String timeout = fessConfig.getCrawlerHotthreadTimeout();
        final String type = fessConfig.getCrawlerHotthreadType();
        try {
            final SearchEngineClient esClient = ComponentUtil.getSearchEngineClient();

     * The value is, e.g. 30s <br>
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getCrawlerHotthreadTimeout();

    /**
     * Get the value for the key 'crawler.hotthread.type'. <br>
     * The value is, e.g. cpu <br>