求大神帮忙看看错误怎么回事 谢谢

sunny96e95

Error doing job: Exception in callback SendfileStreamWriter._sendfile_cb(<Future cancelled>, 20, 18, 27740, 54698, <_UnixSelecto...e debug=False>, True)Traceback (most recent call last):  File "/usr/lib/python3.5/asyncio/events.py", line 126, in _run    self._callback(*self._args)  File "/srv/homeassistant/lib/python3.5/site-packages/aiohttp/web_fileresponse.py", line 37, in _sendfile_cb    loop.remove_writer(out_fd)  File "/usr/lib/python3.5/asyncio/selector_events.py", line 351, in remove_writer    self._ensure_fd_no_transport(fd)  File "/usr/lib/python3.5/asyncio/selector_events.py", line 258, in _ensure_fd_no_transport    fd, transport))RuntimeError: File descriptor 20 is used by transport <_SelectorSocketTransport fd=20 read=polling write=<polling, bufsize=0>>