java.lang.IllegalStateException: The remote endpoint was in state [TEXT_FULL_WRITING] which is an invalid state for called method at org.apache.tomcat.websocket.WsRemoteEndpointImplBase$StateMachine.checkState(WsRemoteEndpointImplBase.java:1015) at org.apache.tomcat.websocket.WsRemoteEndpointImplBase$StateMachine.textStart(WsRemoteEndpointImplBase.java:978) at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendString(WsRemoteEndpointImplBase.java:161) at org.apache.tomcat.websocket.WsRemoteEndpointBasic.sendText(WsRemoteEndpointBasic.java:37)
Bad:
@OnMessage
public String onMessage(String message, Session session) {
...
return message;
}
Good:
@OnMessage
public void onMessage(String message, Session session) {
...
}
再次测试
public void handleTextMessage(WebSocketSession session,TextMessage message){
...
}
改为
public synchronized void handleTextMessage(WebSocketSession session,TextMessage message){
...
}
或者
String websocketsesssion_id = map_id.get(username);
WebSocketSession wss = map_users.get(websocketsesssion_id);
synchronized(wss) {
wss.sendMessage(new TextMessage(new java.util.Date()));
}