Error Connecting for most websites (Failed to establish a new connection: [Errno -2] Name or service not known' in urllib3

I believe this might be a partial duplicate of #230, however, because of lack of information and error output I made my own issue just to be safe.

With the latest python3.7.3 and the correct requirements I constantly run into the issue of websites not connecting. Specifically this happens after trying to connect to Bandcamp, subsequently, all other urls following bandcamp fail as well.

I printed the requests.exceptions.ConnectionError at line 128 as well as the future object class. For some reason, urllib3 seems to fail finding the name or service (so this might be a DNS issue?).

Further details below (snippet from e.g. YouTube):

[-] Error Connecting: YouTube
[-] YouTube: Error!
{'errorType': 'response_url', 'errorUrl': 'https://www.zhihu.com/people/{}', 'rank': 0, 'url': 'https://www.zhihu.com/people/{}', 'urlMain': 'https://www.zhihu.com/', 'username_claimed': 'blue', 'username_unclaimed': 'noonewouldeverusethis7', 'request_future': <Future at 0x7f318072ce80 state=finished raised ConnectionError>}
<Future at 0x7f318072ce80 state=finished raised ConnectionError>
HTTPSConnectionPool(host='www.zhihu.com', port=443): Max retries exceeded with url: /people/berghopper (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f318070c2e8>: Failed to establish a new connection: [Errno -2] Name or service not known'))
<Future at 0x7f318072ce80 state=finished raised ConnectionError>

[Berghopper]

Can you try it now with the latest content on master (version 0.10.0)? In #471, I placed a limit on the number of threads that can be allocated. And, it did not seem to make any difference on performance.

Other people have been having other symptoms, but I wonder if this bug may have been what you have been seeing.

It seems to work fine now, albeit very slow because of the insane amount of DNS requests (I don’t think our home router likes me).

[hoadlck]

Can you try it now with the latest content on master (version 0.10.0)? In #471, I placed a limit on the number of threads that can be allocated. And, it did not seem to make any difference on performance.

Other people have been having other symptoms, but I wonder if this bug may have been what you have been seeing.