New submission from Tom Christie <[email protected]>:
If an asyncio SSL connection is left open (eg. any kind of keep-alive
connection) then after closing the event loop, an exception will be raised...
Python:
```
import asyncio
import ssl
import certifi
async def f():
ssl_context = ssl.create_default_context()
ssl_context.load_verify_locations(cafile=certifi.where())
await asyncio.open_connection('example.org', 443, ssl=ssl_context)
loop = asyncio.get_event_loop()
loop.run_until_complete(f())
loop.close()
```
Traceback:
```
$ python example.py
Fatal write error on socket transport
protocol: <asyncio.sslproto.SSLProtocol object at 0x10e7874a8>
transport: <_SelectorSocketTransport fd=8>
Traceback (most recent call last):
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/asyncio/selector_events.py",
line 868, in write
n = self._sock.send(data)
OSError: [Errno 9] Bad file descriptor
Fatal error on SSL transport
protocol: <asyncio.sslproto.SSLProtocol object at 0x10e7874a8>
transport: <_SelectorSocketTransport closing fd=8>
Traceback (most recent call last):
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/asyncio/selector_events.py",
line 868, in write
n = self._sock.send(data)
OSError: [Errno 9] Bad file descriptor
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/asyncio/sslproto.py",
line 676, in _process_write_backlog
self._transport.write(chunk)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/asyncio/selector_events.py",
line 872, in write
self._fatal_error(exc, 'Fatal write error on socket transport')
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/asyncio/selector_events.py",
line 681, in _fatal_error
self._force_close(exc)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/asyncio/selector_events.py",
line 693, in _force_close
self._loop.call_soon(self._call_connection_lost, exc)
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/asyncio/base_events.py",
line 677, in call_soon
self._check_closed()
File
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/asyncio/base_events.py",
line 469, in _check_closed
raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed
```
It looks to me like the original "OSError: [Errno 9] Bad file descriptor"
probably shouldn't be raised in any case - if when attempting to tear down the
SSL connection, then we should probably pass silently in the case that the
socket has already been closed uncleanly.
Bought to my attention via: https://github.com/encode/httpcore/issues/16
----------
assignee: christian.heimes
components: SSL, asyncio
messages: 340764
nosy: asvetlov, christian.heimes, tomchristie, yselivanov
priority: normal
severity: normal
status: open
title: Asyncio SSL keep-alive connections raise errors after loop close.
versions: Python 3.7
_______________________________________
Python tracker <[email protected]>
<https://bugs.python.org/issue36709>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
