we running tornado tcp server on windows server 2012 machine. machine handles both http-based dashboard , 21 tcp websocket connected clients. in logs see following error. seems @ low level of websocket13 protocol. networking standpoint mean? why write buffer not greater or equal 0? [error] [2017-08-17 11:54:14 am] [tornado.application] exception in callback <bound method websocketprotocol13.periodic_ping of <tornado.websocket.websocketprotocol13 object @ 0x01d7ad30>> traceback (most recent call last): file "c:\python27\lib\site-packages\tornado\ioloop.py", line 1026, in _run return self.callback() file "c:\python27\lib\site-packages\tornado\websocket.py", line 1030, in periodic_ping self.write_ping(b'') file "c:\python27\lib\site-packages\tornado\websocket.py", line 790, in write_ping self._write_frame(true, 0x9, data) file "c:\python27\lib\site-packages\tornado\websocket.py", line 768, in _writ...
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