### WebSocketConnectionClosedException on Makyen/EC2-linux at 2019-03-06T13:31:49Z: Connection is already closed.
File "ws.py", line 196, in <module>
a = ws.recv()
File "/usr/local/lib/python3.6/site-packages/websocket/_core.py", line 310, in recv
opcode, data = self.recv_data()
File "/usr/local/lib/python3.6/site-packages/websocket/_core.py", line 327, in recv_data
opcode, frame = self.recv_data_frame(control_frame)
File "/usr/local/lib/python3.6/site-packages/websocket/_core.py", line 340, in recv_data_frame