watcher.close()关掉watch监听后再重新启动报错?

the watch closed because of error Error: errCode: -402002 realtime listener init watch fail | errMsg: init watch fail Error: invalid state: ws connection not exists, can not send message

history states: UNINIT-(loginStart)->INIT_LOGGING_IN-(loginSuccess)->INIT_LOGGED_IN-(initWatchStart)->INIT_WATCH_PENDING-(initWatchFail)->INIT_WATCH_FAIL-(loginStart)->INIT_LOGGING_IN-(loginSuccess)->INIT_LOGGED_IN-(initWatchStart)->INIT_WATCH_PENDING-(initWatchFail)->INIT_WATCH_FAIL-(loginStart)->INIT_LOGGING_IN-(loginSuccess)->INIT_LOGGED_IN-(initWatchStart)->INIT_WATCH_PENDING-(initWatchFail)->INIT_WATCH_FAIL-(close)->CLOSED