code: public static void destroyAll() {
          if (CommonUtils.isEmpty(SERVER_MAP)) {
              return;
          }
          if (LOGGER.isInfoEnabled()) {
              LOGGER.info("Destroy all server now!");
          }
          for (Map.Entry<String, Server> entry : SERVER_MAP.entrySet()) {
              String key = entry.getKey();
              Server server = entry.getValue();
              try {
                  server.destroy();
              } catch (Exception e) {
                  LOGGER.error("Error when destroy server with key:" + key, e);
              }
          }
          SERVER_MAP.clear();
      }
docs: 关闭全部服务端