Django ConnectionAbortedError + TypeError + AttributeError

Question

I am using Python 3.6.0 + django 1.11 + windows 7 64 bit

my website is running fine but I am keep getting this errors.

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

TypeError: 'NoneType' object is not subscriptable

AttributeError: 'NoneType' object has no attribute 'split'

Why i am getting this ..? and how to fix these errors ?

Traceback (most recent call last):
  File "C:\Python36\lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "C:\Python36\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Python36\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Python36\lib\wsgiref\handlers.py", line 332, in send_headers
    self.send_preamble()
  File "C:\Python36\lib\wsgiref\handlers.py", line 255, in send_preamble
    ('Date: %s\r\n' % format_date_time(time.time())).encode('iso-8859-1')
  File "C:\Python36\lib\wsgiref\handlers.py", line 453, in _write
    result = self.stdout.write(data)
  File "C:\Python36\lib\socketserver.py", line 775, in write
    self._sock.sendall(b)
ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software in your host machine
[18/Sep/2017 12:25:10] "GET /api/dashboard/workorder_list/6/?format=json&_=1505708684218 HTTP/1.1" 500 59
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 32251)
Traceback (most recent call last):
  File "C:\Python36\lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "C:\Python36\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Python36\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Python36\lib\wsgiref\handlers.py", line 332, in send_headers
    self.send_preamble()
  File "C:\Python36\lib\wsgiref\handlers.py", line 255, in send_preamble
    ('Date: %s\r\n' % format_date_time(time.time())).encode('iso-8859-1')
  File "C:\Python36\lib\wsgiref\handlers.py", line 453, in _write
    result = self.stdout.write(data)
  File "C:\Python36\lib\socketserver.py", line 775, 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:\Python36\lib\wsgiref\handlers.py", line 141, in run
    self.handle_error()
  File "C:\Python36\lib\site-packages\django\core\servers\basehttp.py", line 88, in handle_error
    super(ServerHandler, self).handle_error()
  File "C:\Python36\lib\wsgiref\handlers.py", line 368, in handle_error
    self.finish_response()
  File "C:\Python36\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Python36\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Python36\lib\wsgiref\handlers.py", line 331, in send_headers
    if not self.origin_server or self.client_is_modern():
  File "C:\Python36\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:\Python36\lib\socketserver.py", line 639, in process_request_thread
    self.finish_request(request, client_address)
  File "C:\Python36\lib\socketserver.py", line 361, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "C:\Python36\lib\socketserver.py", line 696, in __init__
    self.handle()
  File "C:\Python36\lib\site-packages\django\core\servers\basehttp.py", line 155, in handle
    handler.run(self.server.get_app())
  File "C:\Python36\lib\wsgiref\handlers.py", line 144, in run
    self.close()
  File "C:\Python36\lib\wsgiref\simple_server.py", line 35, in close
    self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
----------------------------------------

Answer 1

This has now been fixed in Python: https://github.com/python/cpython/pull/9713

It will be available in the next version of Python 3.7 and later.