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Re: libcurl 8.16.0 spawning large number of getaddrinfo threads?
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From: Demi Marie Obenour <demiobenour_at_gmail.com>
Date: Thu, 23 Oct 2025 21:04:15 -0400
On 10/23/25 14:31, Dan Fandrich via curl-library wrote:
> On Thu, Oct 23, 2025 at 10:03:04AM +0200, Daniel Stenberg via curl-library wrote:
>> On Mon, 20 Oct 2025, Vadim Grinshpun via curl-library wrote:
>>> I'll look into enabling c-ares. In another part of this thread, Daniel
>>> mentioned that c-ares can behave differently from getaddrinfo; are known
>>> differences documented somewhere? (I'd like to ensure we won't get affected).
>>
>> I'm afraid I don't think they are. I also have not kept track if some of the
>> issues that once were concerns in the past perhaps are not anymore.
>
> I would imagine lacking support for /etc/nsswitch.conf and the glibc NSS
> plug-in system would be a big one.
Some of those are probably solved by running a local DNS resolver,
like dnsmasq or systemd-resolved.
Received on 2025-10-24
Date: Thu, 23 Oct 2025 21:04:15 -0400
On 10/23/25 14:31, Dan Fandrich via curl-library wrote:
> On Thu, Oct 23, 2025 at 10:03:04AM +0200, Daniel Stenberg via curl-library wrote:
>> On Mon, 20 Oct 2025, Vadim Grinshpun via curl-library wrote:
>>> I'll look into enabling c-ares. In another part of this thread, Daniel
>>> mentioned that c-ares can behave differently from getaddrinfo; are known
>>> differences documented somewhere? (I'd like to ensure we won't get affected).
>>
>> I'm afraid I don't think they are. I also have not kept track if some of the
>> issues that once were concerns in the past perhaps are not anymore.
>
> I would imagine lacking support for /etc/nsswitch.conf and the glibc NSS
> plug-in system would be a big one.
Some of those are probably solved by running a local DNS resolver,
like dnsmasq or systemd-resolved.
-- Sincerely, Demi Marie Obenour (she/her/hers)
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