error: [Errno 10053]

Question

If I am coding on Flask, then I sometimes get this error:

Traceback (most recent call last):   File "C:\Python27\lib\SocketServer.py", line 284, in _handle_request_noblock     self.process_request(request, client_address)   File "C:\Python27\lib\SocketServer.py", line 310, in process_request     self.finish_request(request, client_address)   File "C:\Python27\lib\SocketServer.py", line 323, in finish_request     self.RequestHandlerClass(request, client_address, self)   File "C:\Python27\lib\SocketServer.py", line 640, in __init__     self.finish()   File "C:\Python27\lib\SocketServer.py", line 693, in finish     self.wfile.flush()   File "C:\Python27\lib\socket.py", line 303, in flush     self._sock.sendall(view[write_offset:write_offset+buffer_size]) error: [Errno 10053] ��������� �� ����� ����- 

Any ideas why this would happen (win8 x64, python27 x32)?

Answer 1

From the Windows Sockets Error Codes list:

WSAECONNABORTED 10053
Software caused connection abort.
An established connection was aborted by the software in your host computer, possibly due to a data transmission time-out or protocol error.

There was a timeout or other network-level error. This is your operating system closing the socket, nothing to do with Python or Flask, really.

It could be the remote browser stopped responding, the network connection died, or a firewall closed the connection because it was open too long, or any other number of reasons.

Answer 2

Hello, This is an issue with the Python 2 implementation of the SocketServer module, it is not present in Python 3 (where the server keeps on serving).

Your have 3 options:

Don't use the built-in server for production systems (it is a development server after all). Use a proper WSGI server like gunicorn or uWSGI.

Enable threaded mode with app.run(threaded=True); the thread dies but a new one is created for future requests,

Upgrade to Python 3.

So whenever there is error like

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

Server would be restarted if you have done like app.run(threaded=True).