private void notifyAllUserGone(ManageClientArgument mcArg) {
		this.log.info("notify All User Gone");
		if (this.chatServer.manageClients(ClientCommand.BYE, mcArg)) {
			Object[] sockets = mcArg.clientsSocket.toArray();
			for (int i = 0; i < sockets.length; i++) {
				try {
					PrintStream serverResponses = new PrintStream(
							((Socket) sockets[i]).getOutputStream());
					this.log.info("Get PrintStream " + i);
					serverResponses.format(
							ServerFormatResponce.USER_GONE.getName(),
							(Object) this.clientName);
					this.log.info("send to " + i);
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
					this.log.info("fail but continue");
					continue;
				}
			}
		}
	}