RFR: 8354530: AIX: sporadic unexpected errno when calling setsockopt in Net.joinOrDrop [v2]

[Thomas Stuefe]

On Wed, 14 May 2025 18:59:31 GMT, Arno Zeller <azeller at openjdk.org> wrote:

>> src/java.base/unix/native/libnio/ch/Net.c line 683:
>> 
>>> 681:         }
>>> 682:     }
>>> 683: #endif
>> 
>> drive-by comment, would it not make sense to then wait some milliseconds before the next try?
>
> I am unsure if this would be better - I have seen test failing about 2-3 times a day in our nightly tests. With a direct retry I have seen tests failing only every 3-5 days - with a second retry it failed only one time in 3 weeks. Therefore I decided to go for 3 retries without waiting. 
> Another possibility would be to wait for an increasing number of milliseconds - like 0, 10, 20ms in each try. But I am not sure if this is worth it.
> What do you think?

Do we know what the underlying problem is? We are waiting on the kernel? Or something outside?

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PR Review Comment: https://git.openjdk.org/jdk/pull/24996#discussion_r2090248101