final FessConfig fessConfig = ComponentUtil.getFessConfig();

        buf.append('{');

        final boolean ignoreIdleThreads = Constants.TRUE.equalsIgnoreCase(fessConfig.getCrawlerHotthreadIgnoreIdleThreads());
        final TimeValue interval = TimeValue.parseTimeValue(fessConfig.getCrawlerHotthreadInterval(), "crawler.hotthread.interval");
        final int threads = fessConfig.getCrawlerHotthreadThreadsAsInteger();

     * comment: Whether to ignore idle threads in hot thread monitoring.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getCrawlerHotthreadIgnoreIdleThreads();

    /**
     * Is the property for the key 'crawler.hotthread.ignore_idle_threads' true? <br>
     * The value is, e.g. true <br>