Apply suggestions by Kumar

Co-Authored-By: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>

Lib/asyncio/proactor_events.py

@@ -52,7 +52,6 @@ def __init__(self, loop, sock, protocol, waiter=None,
         super().__init__(extra, loop)
         self._set_extra(sock)
         self._sock = sock
-        self._sock_called_close = False
         self.set_protocol(protocol)
         self._server = server
         self._buffer = None  # None or bytearray.
@@ -153,6 +152,8 @@ def _force_close(self, exc):
         self._loop.call_soon(self._call_connection_lost, exc)
 
     def _call_connection_lost(self, exc):
+        if self._called_connection_lost:
+            return
         try:
             self._protocol.connection_lost(exc)
         finally:
@@ -162,12 +163,7 @@ def _call_connection_lost(self, exc):
             # cure it, but maybe using DisconnectEx() would be better.
             if hasattr(self._sock, 'shutdown') and self._sock.fileno() != -1:
                 self._sock.shutdown(socket.SHUT_RDWR)
-            # We can't call sock._close() indiscriminately because something
-            # else might be calling _call_connection_lost again.
-            if not self._sock_called_close:
-                self._sock.close()
             self._sock = None
-            self._sock_called_close = True
             server = self._server
             if server is not None:
                 server._detach()

Misc/NEWS.d/next/Library/2022-10-26-07-51-55.gh-issue-98703.0hW773.rst

@@ -1 +1,2 @@
-Fix asyncio ``drain`` closing a non-existent socket multiple times.
+Fix :meth:`asyncio.StreamWriter.drain` to call ``protocol.connection_lost``
+callback only once on Windows.