ThreadPoolExhaustedListener 在最新版本中未发现用户配置的入口，这个功能的设计初衷我理解，是发生线程池耗尽通知给应用，目前没看到应用如何添加监听的地方。
private static final long serialVersionUID = 6913423882496634749L;
    /**
     * Protocol name
     */
    private String name;
    /**
     * Service ip address (when there are multiple network cards available)
     */
    private String host;
    /**
     * Service port
     */
    private Integer port;
    /**
     * Context path
     */
    private String contextpath;
    /**
     * Thread pool
     */
    private String threadpool;
    /**
     * Thread pool name
     */
    private String threadname;
    /**