ProxyError while running my python script

Python Help
1

Hi ,

I am running a python script which is working fine locally. But from a remote machine where the proxy is enabled (os.environ[‘HTTPS_PROXY’], os.environ[‘HTTP_PROXY’]), the script work fine for some duration but after some time. It throws a ProxyError as follows. Any suggestions to resolve this?

urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='MY_Application_Hostname_goes_here', port=443): Max retries exceeded with url: /services/data/v50.0/query/?q=SELECT+..... (Caused by ProxyError('Cannot connect to proxy.', ConnectionResetError(104, 'Connection reset by peer')))

requests.exceptions.ProxyError: HTTPSConnectionPool(host='MY_Application_Hostname_goes_here', port=443): Max retries exceeded with url: /services/data/v50.0/query/?q=SELECT...... (Caused by ProxyError('Cannot connect to proxy.', ConnectionResetError(104, 'Connection reset by peer')))

When we checked the proxy log, It shows “TCP_TUNNEL_ABORTED” which states the connection is being closed by the client. So it is not from server end.

2

At face value this means the proxy reset the tcp connect.
That would seem to indicate a problem with the proxy.
Does it have a max connection limit that you are hitting?

3

@Barrry Thanks for your reply, I am running a single user hitting 2 requests per sec. When you say max connection limit, is it from python config level or the application(this doesn’t have any limit- i understand the limit is in terms of 2gbps which is high)?

4

It is the server that has the problem not the python code as far as i can guess.
I am assuming that reset that is in the error message is the rst tcp ip packet sent from the server.

5

Would you mind telling me the exact line where it tells the rest TCP IP packet sent from the servers. I am new to this kind of error. Sorry again to ask if this is layman question.

[squid-users] TCP_TUNNEL_ABORTED/200? → When i check the status from the logs it is TCP_TUNNEL_ABORTED and its summary is provided in this link.

The below IP will be different in my case. Tried both approaches.
os.environ['HTTPS_PROXY'] = 'http://127.0.0.1:8080'
os.environ['HTTP_PROXY'] = 'http://127.0.0.1:8080'

os.environ['HTTPS_PROXY'] = 'http://127.0.0.1:8080'
os.environ['HTTP_PROXY'] = 'https://127.0.0.1:8080'
6

I’m assuming that is what this error means. (peer == server)
To be sure you would need to run wireshark and capture the packets to see the detail of the TCP echange.