issue : sock_accept of ProactorEventLoop missed OSError 64 (ERROR_NETNAME_DELETED)

client.py

# dummy client 
import asyncio
import logging
import socket

ip = "127.0.0.1"

@asyncio.coroutine
def test_conn(loop):
    try:
        c = socket.socket()
        c.setblocking(False)
        yield from loop.sock_connect(c, (ip, 9090))
        logging.info("socket connected")

    except OSError:
        logging.info("socket disconnected")


def main():
    l = logging.getLogger()
    l.setLevel(logging.INFO)
    loop = asyncio.ProactorEventLoop()
    asyncio.set_event_loop(loop)

    for i in range(5000):
        loop.create_task(test_conn(loop))
    loop.run_forever()
    loop.close()


if __name__ == "__main__":
    main()

server.py

import asyncio
import logging
import os
import socket

ip = "127.0.0.1"

@asyncio.coroutine
def accept(loop, s):
    while True:
        try:
            yield from loop.sock_accept(s)
        except asyncio.CancelledError:
            logging.info("on socket accept failed - cancelled error")
        except OSError:
            logging.info("on socket accept failed - os error ")
        else:
            logging.info("on socket accept")

def main():
    l = logging.getLogger()
    l.setLevel(logging.INFO)
    loop = asyncio.ProactorEventLoop()
    asyncio.set_event_loop(loop)

    s = socket.socket()
    s.setblocking(False)
    s.bind((ip, 9090))
    s.listen(500)

    loop.run_until_complete(accept(loop, s))
    loop.close()


if __name__ == "__main__":
    main()