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Added explanation why the timeout is doubled.(#5773) #5776

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Added explanation why the timeout is doubled.(#5773) #5776

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d5d5b25
Added explanation why the timeout is doubled.(#5773)
cpyberry Mar 17, 2021
39fb2a0
Added more detailed description.
cpyberry Mar 17, 2021
423c6c1
Removed misleading expressions and added an example of an extreme method
cpyberry Mar 18, 2021
7bf329c
Added a more detailed description of the timeout argument.
cpyberry Mar 19, 2021
1ad9b25
clarified ambiguous words
cpyberry Apr 13, 2021
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3 changes: 3 additions & 0 deletions docs/user/advanced.rst
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Expand Up @@ -1076,3 +1076,6 @@ coffee.
r = requests.get('https://github.com', timeout=None)

.. _`connect()`: https://linux.die.net/man/2/connect

If the client supports IPv6 (AAAA record) and the specified domain has multiple IP addresses, `urllib3`_ will continue to try another IP addresses (such as IPv6) if they reach the specified connection timeout.
This phenomenon can actually wait for a larger or multiplied time, ignoring the connection timeout. You may consider an extreme solution, such as ensuring that the domain name you specify returns one IP Address (which prevents it from returning IPv6). However, it can cause new issues.