[]socket连续发送消息导致无法写出

public function send(cmd:int , req:Object):void

		{

			var json:String = JSON.stringify(req);

			var data:ByteArray = new ByteArray();

			data.writeUTFBytes(json);

			data.compress();

			var obj:Object = {};

			var headByte:ByteArray = new ByteArray();

			writeHeader(obj, headByte);

			_socket.output.clear();

			_socket.output.writeBytes(headByte);

			_socket.output.writeBytes(data);

			_socket.flush();

		}