assertEquals("500ms", fessConfig.getCrawlerHotthreadInterval());
    }

    public void test_crawlerHotthreadSnapshots() {
        assertEquals(Integer.valueOf(10), fessConfig.getCrawlerHotthreadSnapshotsAsInteger());
    }

    public void test_crawlerHotthreadThreads() {
        assertEquals(Integer.valueOf(3), fessConfig.getCrawlerHotthreadThreadsAsInteger());
    }

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getCrawlerHotthreadSnapshotsAsInteger();

    /**
     * Get the value for the key 'crawler.hotthread.threads'. <br>
     * The value is, e.g. 3 <br>
     * comment: Number of threads for hot thread monitoring.