Fatal error on transport TCPTransport (error status in uv_stream_t.shutdown callback)

[lgrahl]

• uvloop version: 0.12.2
• Python version: 3.7.1
• Platform: Ubuntu 18.04.2 LTS

We're encountering the following fatal error on a daily basis on our production server using @aaugustin's WebSocket implementation:

Fatal error on transport TCPTransport (error status in uv_stream_t.shutdown callback)
protocol: <websockets.server.WebSocketServerProtocol object at 0x7fc1a3bd8f98>
transport: <TCPTransport closed=False reading=False 0x1cc72c8>
OSError: [Errno 107] Transport endpoint is not connected

Apparently this happens when reading using a subclassed asnycio.StreamReader since the websockets library subsequently raises a ConnectionClosed error in its recv function.

Unfortunately, I was not able to reproduce this locally and I honestly don't really know where to look either.

[bsergean]

I'm also getting that error + I'm using the same websocket library (and python 3.7.3 on alpine linux)

[jlaine]

This may have been solved by ef29dab could you give uvloop 0.13.0 a spin a report back?

[bsergean]

Looks like the problem is gone (I also switched to python 3.7.4 btw). Thanks for the hint @jlaine !

[jlaine]

@lgrahl as it's your issue could you give it a go and report back?

[Prideauxx]

I'm having the same/similar issue using 0.13.0 with streaming protocol (TCP):

protocol: <loader_comms.AsyncLoaderServiceProtocol object at 0x7f63564f1a58>
transport: <TCPTransport closed=False reading=False 0x17f0da8>
Traceback (most recent call last):
  File "uvloop/handles/stream.pyx", line 769, in uvloop.loop.__uv_stream_on_read_common
  File "uvloop/handles/stream.pyx", line 615, in uvloop.loop.UVStream._on_eof
  File "/usr/lib/python3.5/asyncio/protocols.py", line 94, in eof_received
    def eof_received(self):
  File "./iteration_manager.py", line 267, in sig_handler
    sys.exit(0)
SystemExit: 0

Attempted same shutdown with base asyncio; issue not present there. Thank you for looking at this.

[bsergean]

Have you tried with python 3.7 ?

[fantix]

Closing for now, please feel free to reply/open a new issue.