org.java_websocket.exceptions.WebsocketNotConnectedException: null

WebSocketClient連接webSocket服務端發送消息報錯，錯誤信息如下：

 org.java_websocket.exceptions.WebsocketNotConnectedException: null
    at org.java_websocket.WebSocketImpl.send(WebSocketImpl.java:630)
    at org.java_websocket.WebSocketImpl.send(WebSocketImpl.java:607)
    at org.java_websocket.client.WebSocketClient.send(WebSocketClient.java:344)

 通過查看源碼可以發現當前的webSocket連接是not isOpen

如何解決？

while (!client.getReadyState().equals(ReadyState.OPEN)) {
        logger.debug("連接中···請稍後");
     }
client.send("hello,webSocket connected");