[Bug 274964] java/openjdk21 Dual-stack IPv4/IPv6 applications no longer work with sysctl net.inet6.ip6.v6only=1

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 01 Dec 2023 19:58:41 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274964

Michael Osipov <michaelo@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |michaelo@FreeBSD.org

--- Comment #3 from Michael Osipov <michaelo@FreeBSD.org> ---
Tomcat committer here. I am fairly well acquiant with the libtcnative code and
looking at your description (quick scan) it does not make sense since the APR
connector does not use any Java code actually...We need to try to isolate this
outside of Tomcat to get a better understanding. Means:

* Bind a dual-stack socket with plain Java
* Bind a DS socket with APR, e.g.,
https://gist.github.com/michael-o/dfb86df472f62d2b2dff6ef12ee3758e
* Bind a DS socket with Python which is very near to low-level C code

and check with sockstat.

Can you meanwhile provide details:

OS version, etc. Ultimately, I need to understand who's fault this is and what
we need to fix.

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