BUG. ssl.SSLError: [SSL: KRB5_S_INIT] application data after close notify

[ghost]

Long story short

If assert is between function where I use ClientSession() -> this give error to me:

SSL error in data received  
protocol: <asyncio.sslproto.SSLProtocol object at 0x7f27f8585ac8>  
transport: <_SelectorSocketTransport fd=38 read=polling write=<idle, bufsize=0>>  
Traceback (most recent call last):  
  File "/usr/lib/python3.7/asyncio/sslproto.py", line 526, in data_received
    ssldata, appdata = self._sslpipe.feed_ssldata(data)
  File "/usr/lib/python3.7/asyncio/sslproto.py", line 207, in feed_ssldata
    self._sslobj.unwrap()
  File "/usr/lib/python3.7/ssl.py", line 767, in unwrap
    return self._sslobj.shutdown()
ssl.SSLError: [SSL: KRB5_S_INIT] application data after close notify (_ssl.c:2592)

Expected behaviour

No errors, I am using try..catch

Actual behaviour

Show me error message in console.

Steps to reproduce

import asyncio
from aiohttp import ClientSession, ClientTimeout


async def fun3(url):
    try:
        async with ClientSession(timeout=timeout) as s:
            async with s.get(url) as r:
                if r.status == 200:
                    return True
                else:
                    return False
    except:
        return False


async def fun1(session, url):
    try:
        async with session.get(url) as r:
            # Make assert here, special. And error displayed
            assert 'A77er1 9rr0r' in await r.text()

        return [True, url]
    except:
        return [False, '']


async def fun0(url):
    url = url if 'http' in url else 'http://' + url

    # If I remove this function - all good
    if await fun3(url):
        return

    async with ClientSession(timeout=timeout) as s:
        temp = await fun1(s, url)

        if temp[0]:
            print('Good')


async def main():
    tasks = []
    # I have many items, just add to simulate real behavior
    task = asyncio.create_task(
        fun0(
            'https://python.org'
        )
    )
    tasks.append(task)

    await asyncio.gather(*tasks)


if __name__ == "__main__":
    timeout = ClientTimeout(total=10)

    asyncio.run(main())

Your environment

• Ubuntu 18.04

• Python 3.7.1

• GCC 8.2.0

• asyncio v3.4.3

• aiohttp v3.5.1

[aio-libs-bot]

GitMate.io thinks the contributor most likely able to help you is @asvetlov.

Possibly related issues are #3477 ("Application data after close notify" regression in 3.5.0 with SSL connection), #2497 (ClientSession keep transferring data after closed), #3052 (SSL with closed connections), #370 (Server closes connection before sending data), and #1907 (aiohttp 2.x closing client request data stream).

[asvetlov]

A copy of #3477

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