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Fatal error on transport TCPTransport (error status in uv_stream_t.shutdown callback) #244

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lgrahl opened this issue Apr 8, 2019 · 6 comments
Open

Fatal error on transport TCPTransport (error status in uv_stream_t.shutdown callback) #244

lgrahl opened this issue Apr 8, 2019 · 6 comments
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@lgrahl
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@lgrahl lgrahl commented Apr 8, 2019 •
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  • 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.
@jlaine jlaine mentioned this issue May 2, 2019
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@bsergean
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@bsergean bsergean commented Aug 23, 2019

I'm also getting that error + I'm using the same websocket library (and python 3.7.3 on alpine linux)
@jlaine
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@jlaine jlaine commented Aug 24, 2019

This may have been solved by ef29dab could you give uvloop 0.13.0 a spin a report back?
bsergean pushed a commit to machinezone/cobra that referenced this issue Aug 24, 2019
Benjamin Sergeant
* Upgrade uvloop dependency to 0.13.0 to hopefully solve [Fatal error…
Loading status checks…
740ded9 
… on transport TCPTransport](MagicStack/uvloop#244) kind of errors. Dockerfile uses Python 3.7.4
@bsergean
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@bsergean bsergean commented Aug 24, 2019

Looks like the problem is gone (I also switched to python 3.7.4 btw). Thanks for the hint @jlaine !
@jlaine
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@jlaine jlaine commented Aug 25, 2019

@lgrahl as it's your issue could you give it a go and report back?
@Prideauxx
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@Prideauxx Prideauxx commented Sep 6, 2019

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
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@bsergean bsergean commented Sep 6, 2019

Have you tried with python 3.7 ?
@1st1 1st1 added the need more info label Oct 24, 2019
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@1st1 @jlaine @lgrahl @bsergean @Prideauxx
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