RuntimeError: unable to perform operation on UnixTransport

[mohammadhzp]

Hello
It causes a series of exceptions

Full error output is :

Task exception was never retrieved
future: <Task finished coro=<Sanic.handle_request() done, defined at /usr/local/lib/python3.6/site-packages/sanic/app.py:519> exception=AttributeError("'NoneType' object has no attribute 'getpeername'",) created at /usr/local/lib/python3.6/site-packages/sanic/server.py:299>
source_traceback: Object created at (most recent call last):
  File "main.py", line 68, in <module>
    access_log=False, backlog=8000)
  File "/usr/local/lib/python3.6/site-packages/sanic/app.py", line 648, in run
    serve_multiple(server_settings, workers)
  File "/usr/local/lib/python3.6/site-packages/sanic/server.py", line 686, in serve_multiple
    process.start()
  File "/usr/lib64/python3.6/multiprocessing/process.py", line 105, in start
    self._popen = self._Popen(self)
  File "/usr/lib64/python3.6/multiprocessing/context.py", line 223, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "/usr/lib64/python3.6/multiprocessing/context.py", line 277, in _Popen
    return Popen(process_obj)
  File "/usr/lib64/python3.6/multiprocessing/popen_fork.py", line 26, in __init__
    self._launch(process_obj)
  File "/usr/lib64/python3.6/multiprocessing/popen_fork.py", line 80, in _launch
    code = process_obj._bootstrap()
  File "/usr/lib64/python3.6/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib64/python3.6/multiprocessing/process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.6/site-packages/sanic/server.py", line 609, in serve
    loop.run_forever()
  File "/usr/local/lib/python3.6/site-packages/sanic/server.py", line 220, in data_received
    self.parser.feed_data(data)
  File "/usr/local/lib/python3.6/site-packages/sanic/server.py", line 289, in on_message_complete
    self.execute_request_handler()
  File "/usr/local/lib/python3.6/site-packages/sanic/server.py", line 299, in execute_request_handler
    self.stream_response))
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/sanic/server.py", line 339, in write_response
    self.keep_alive_timeout))
  File "uvloop/handles/stream.pyx", line 636, in uvloop.loop.UVStream.write
  File "uvloop/handles/handle.pyx", line 165, in uvloop.loop.UVHandle._ensure_alive
RuntimeError: unable to perform operation on <UnixTransport closed=True reading=False 0x7f00061252a8>; the handler is closed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib64/python3.6/asyncio/coroutines.py", line 126, in send
    return self.gen.send(value)
  File "/usr/local/lib/python3.6/site-packages/sanic/app.py", line 590, in handle_request
    write_callback(response)
  File "/usr/local/lib/python3.6/site-packages/sanic/server.py", line 349, in write_response
    self.request.ip)
  File "/usr/local/lib/python3.6/site-packages/sanic/request.py", line 172, in ip
    self._get_address()
  File "/usr/local/lib/python3.6/site-packages/sanic/request.py", line 188, in _get_address
    self._socket = (self.transport.get_extra_info('peername') or
  File "uvloop/handles/basetransport.pyx", line 320, in uvloop.loop.UVBaseTransport.get_extra_info
AttributeError: 'NoneType' object has no attribute 'getpeername'

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/sanic/server.py", line 178, in response_timeout_callback
    raise ServiceUnavailable('Response Timeout')
sanic.exceptions.ServiceUnavailable: Response Timeout

This is how I start Sanic:

def bind_unix_socket(s_p):
    if os.path.exists(s_p):
        os.unlink(s_p)
    sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    sock.setblocking(0)
    sock.bind(s_p)
    os.chmod(s_p, 0o777)
    sock.listen(8000)
    return sock

_app.run(sock=bind_unix_socket('/mnt/writable/app.sock'), protocol=CustomServer, workers=os.cpu_count(), debug=True, access_log=False, backlog=8000)

Of course debug is False on production.

Fedora 27, Python3.6 and Sanic 0.7.0
I use Nginx in front of Sanic

Any Idea why this happens ? Is it a bug ?

[yunstanford]

What does your CustomServer Protocol look like ?
I can't reproduce your issue with default protocol.

[mohammadhzp]

Sorry for delay
CustomServer only changes two configs

class CustomServer(sanic.server.HttpProtocol):
    def __init__(self, *, loop, request_handler, error_handler, **kwargs):
        kwargs['request_max_size'] = config.SERVER_MAX_CHUNK_SIZE
        kwargs['keep_alive'] = False
        super().__init__(loop=loop, request_handler=request_handler, error_handler=error_handler, **kwargs)

[mohammadhzp]

Any Idea why this happen and how I'm suppose to prevent it ?
Also config.SERVER_MAX_CHUNK_SIZE is 52428800

[sjsadowski]

This should be resolved as of 0.8.0