RFR: 8373704: Improve "SocketException: Protocol family unavailable" message [v2]

[Matthias Baesken]

On Thu, 18 Dec 2025 16:39:06 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> In [JDK-8373676](https://bugs.openjdk.org/browse/JDK-8373676)
>> we noticed a "SocketException: Protocol family unavailable" because of missing ipv6 support. We could improve this exception and tell that the ipv6 support is not available or something related.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adjust the message as suggested by jaikiran

Thanks for the reviews !  I observed no issues in the  tier2 tests .

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PR Comment: https://git.openjdk.org/jdk/pull/28851#issuecomment-3709398862