https://github.com/python/asyncio/issues/319

On Windows, asyncio servers sometimes print such log messages when clients disconnect:

```
ERROR:master:asyncio:Fatal write error on pipe transport
protocol: <asyncio.streams.StreamReaderProtocol object at 0x0000000003F63FD0>
transport: <_ProactorSocketTransport fd=756>
Traceback (most recent call last):
  File "C:\Users\User\Miniconda3\lib\asyncio\proactor_events.py", line 283, in _loop_writing
    self._write_fut = self._loop._proactor.send(self._sock, data)
  File "C:\Users\User\Miniconda3\lib\asyncio\windows_events.py", line 450, in send
    ov.WSASend(conn.fileno(), buf, flags)
ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software on your host machine.
```

I guess that this line:
https://github.com/python/asyncio/blob/39c135baf73762830148236da622787052efba19/asyncio/proactor_events.py#L291

should be changed to also catch ``ConnectionAbortedError``, as this exception also happens when connections are closed on Windows, in addition to ``ConnectionResetError``.

Attached patch fixes the issue.

Your patch seems to miss the ``_fatal_error`` method in ``proactor_events.py`` (which is actually where the bug happens in my application - it's using ``ProactorEventLoop``).

> Your patch seems to miss the ``_fatal_error`` method in ``proactor_events.py`` (which is actually where the bug happens in my application - it's using ``ProactorEventLoop``).

Oops :-) What a shame. It's now fixed.

Note: _UnixReadPipeTransport._fatal_error() uses the check:

    isinstance(exc, OSError and exc.errno == errno.EIO

It doesn't use _FATAL_ERROR_IGNORE.

Tested it, that works, thanks!

Can someone please commit the patch?

New changeset 68e694475483 by Victor Stinner in branch '3.5':
asyncio: Don't log ConnectionAbortedError
https://hg.python.org/cpython/rev/68e694475483

> Can someone please commit the patch?

Done.