Exceptions when viewing project on local machine

[Chaos]

Hello,

When running Django locally with the following command: "python -m django runserver" I receive 3 exceptions on every request I make to the webserver, on the browser nothing seems to work unusually. The page loads normally, but these exceptions are always printed. None of the tracebacks point to any of my code actually.

My view is basic:

def homepage(request):
    return render(request, 'sites/home.html')

Exceptions:

Traceback (most recent call last):
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 332, in send_headers
    self.send_preamble()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 255, in send_preamble
    ('Date: %s\r\n' % format_date_time(time.time())).encode('iso-8859-1')
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 453, in _write
    result = self.stdout.write(data)
  File "C:\Program Files (x86)\Python3.7\lib\socketserver.py", line 799, in write
    self._sock.sendall(b)
ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software in your host machine
[16/Apr/2019 21:22:37] "GET /assets/favicon.ico HTTP/1.1" 500 59
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 62675)
Traceback (most recent call last):
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 332, in send_headers
    self.send_preamble()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 255, in send_preamble
    ('Date: %s\r\n' % format_date_time(time.time())).encode('iso-8859-1')
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 453, in _write
    result = self.stdout.write(data)
  File "C:\Program Files (x86)\Python3.7\lib\socketserver.py", line 799, in write
    self._sock.sendall(b)
ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software in your host machine

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 141, in run
    self.handle_error()
  File "E:\Development\Python Environments\env\lib\site-packages\django\core\servers\basehttp.py", line 116, in handle_error
    super().handle_error()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 368, in handle_error
    self.finish_response()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 331, in send_headers
    if not self.origin_server or self.client_is_modern():
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 344, in client_is_modern
    return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9'
TypeError: 'NoneType' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Program Files (x86)\Python3.7\lib\socketserver.py", line 650, in process_request_thread
    self.finish_request(request, client_address)
  File "C:\Program Files (x86)\Python3.7\lib\socketserver.py", line 360, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "C:\Program Files (x86)\Python3.7\lib\socketserver.py", line 720, in __init__
    self.handle()
  File "E:\Development\Python Environments\env\lib\site-packages\django\core\servers\basehttp.py", line 171, in handle
    self.handle_one_request()
  File "E:\Development\Python Environments\env\lib\site-packages\django\core\servers\basehttp.py", line 194, in handle_one_request
    handler.run(self.server.get_app())
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\handlers.py", line 144, in run
    self.close()
  File "E:\Development\Python Environments\env\lib\site-packages\django\core\servers\basehttp.py", line 111, in close
    super().close()
  File "C:\Program Files (x86)\Python3.7\lib\wsgiref\simple_server.py", line 35, in close
    self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
----------------------------------------

Thank you!

[Mariusz Felisiak]

I was not able to reproduce this issue. IMO it is some Windows issue related with sockets. I wouldn't blame Django, see

ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software in your host machine

maybe antivirus or firewall blocks connections, it is hard to tell.