Why does Python requests keep giving me this error? "An existing connection was forcibly closed by the remote host"

Question

I am attempting to send a request to Binance api (crypto exchange) for the latest price of a specific symbol of crypto every ten seconds. However after between 5 to 20 hours it stops working throwing this error:

Traceback (most recent call last): File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connectionpool.py", line 703, in urlopen httplib_response = self._make_request( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connectionpool.py", line 386, in _make_request self._validate_conn(conn) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connectionpool.py", line 1040, in validate_conn conn.connect() File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connection.py", line 416, in connect self.sock = ssl_wrap_socket( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\util\ssl.py", line 449, in ssl_wrap_socket ssl_sock = ssl_wrap_socket_impl( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\util\ssl.py", line 493, in _ssl_wrap_socket_impl return ssl_context.wrap_socket(sock, server_hostname=server_hostname) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\ssl.py", line 512, in wrap_socket return self.sslsocket_class._create( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\ssl.py", line 1070, in _create self.do_handshake() File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\ssl.py", line 1341, in do_handshake self._sslobj.do_handshake() ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\requests\adapters.py", line 440, in send resp = conn.urlopen( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connectionpool.py", line 785, in urlopen retries = retries.increment( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\util\retry.py", line 550, in increment raise six.reraise(type(error), error, _stacktrace) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\packages\six.py", line 769, in reraise raise value.with_traceback(tb) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connectionpool.py", line 703, in urlopen httplib_response = self._make_request( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connectionpool.py", line 386, in _make_request self._validate_conn(conn) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connectionpool.py", line 1040, in validate_conn conn.connect() File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\connection.py", line 416, in connect self.sock = ssl_wrap_socket( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\util\ssl.py", line 449, in ssl_wrap_socket ssl_sock = ssl_wrap_socket_impl( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\urllib3\util\ssl.py", line 493, in _ssl_wrap_socket_impl return ssl_context.wrap_socket(sock, server_hostname=server_hostname) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\ssl.py", line 512, in wrap_socket return self.sslsocket_class._create( File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\ssl.py", line 1070, in _create self.do_handshake() File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\ssl.py", line 1341, in do_handshake self._sslobj.do_handshake() urllib3.exceptions.ProtocolError: ('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "c:\Users\nrspa\Desktop\CryptoBot v2.6 (24h)\main (market).py", line 113, in CB.main() File "c:\Users\nrspa\Desktop\CryptoBot v2.6 (24h)\main (market).py", line 68, in main self.array = self.create_array() File "c:\Users\nrspa\Desktop\CryptoBot v2.6 (24h)\main (market).py", line 46, in create_array self.array.append(self.get_price()) File "c:\Users\nrspa\Desktop\CryptoBot v2.6 (24h)\main (market).py", line 22, in get_price response = requests.get(url, headers = {"User-Agent" : "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36"}) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\requests\api.py", line 75, in get return request('get', url, params=params, **kwargs) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\requests\api.py", line 61, in request return session.request(method=method, url=url, **kwargs) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\requests\sessions.py", line 529, in request resp = self.send(prep, **send_kwargs) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\requests\sessions.py", line 645, in send r = adapter.send(request, **kwargs) File "C:\Users\nrspa\AppData\Local\Programs\Python\Python310\lib\site-packages\requests\adapters.py", line 501, in send raise ConnectionError(err, request=request) requests.exceptions.ConnectionError: ('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

Also note that this is my code (it is part of a class) it gets the price from Binance every 10 seconds until the desired array length is reached, at which point it processes the data:

import json
import requests
import time

def get_price(self):
    url = f"https://api.binance.com/api/v3/ticker/price?symbol={self.symbol}" 
    response = requests.get(url, headers = {"User-Agent" : "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36"})
    json_response = json.loads(response.text)
    return float(json_response['price'])

def create_array(self):
    i = len(self.array)
    if i < self.array_len:
        while i < self.array_len:
            time.sleep(self.time_interval)
            self.array.append(self.get_price())
            i = i + 1
        return self.array
    else:
        main()

Answer 1

The issue can be caused by a "disagreement" between both sides. It can be that the connection timed out or the server closed it.

The fix is to catch this exception and open the connection again.