New submission from Eric Toombs :
I'm not exactly sure what caused this error, but I was a client receiving
messages on a websocket for a while (about 12 hours). Suddenly all incoming
data stopped, then nothing happened for about 5 hours. Finally, I received a
ConnectionClosed and the following appeared on stdout:
```
Fatal error on SSL transport
protocol:
transport: <_SelectorSocketTransport closing fd=15 read=idle write=>
Traceback (most recent call last):
File "/usr/lib/python3.6/asyncio/sslproto.py", line 636, in
_process_write_backlog
ssldata, offset = self._sslpipe.feed_appdata(data, offset)
AttributeError: 'NoneType' object has no attribute 'feed_appdata'
```
I can't imagine this is what was supposed to happen. This has happened about
three times now, so I can confirm it is reproducible. I'm writing a minimalist
client now to see if I can isolate the problem any further. It's still unclear,
though, which layer is responsible---websockets or asyncio. The websockets
issue is here:
https://github.com/aaugustin/websockets/issues/356
------
components: asyncio
messages: 314008
nosy: Eric Toombs, asvetlov, yselivanov
priority: normal
severity: normal
status: open
title: Fatal error on SSL transport
versions: Python 3.6
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<https://bugs.python.org/issue33093>
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