RFR: 8335771: Improve stability of java/nio/channels/DatagramChannel tests [v4]

[Alan Bateman]

On Wed, 14 Aug 2024 09:43:28 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> Several `java/nio/channels/DatagramChannel` tests fail intermittently. Though it seems difficult to fix all intermittent failures due to the nature of what some of these attempt to test, the stability can still be improved.
>> 
>> The most common source of intermittent failures are:
>> 
>>  - not receiving a datagram due to port conflict or interference of concurrent running tests
>>  - failure to disconnect due to interference of concurrent running tests
>>  - failure due to reception of unexpected stray datagrams
>> 
>> Avoiding to bind on the wildcard address, filtering unexpected datagram, and some retrying can aleviate some of the issues and greatly reduce the frequency of intermittent failures.
>
> Daniel Fuchs has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:
> 
>  - Merge branch 'master' into JDK-8335771
>  - Review feedback
>  - Review feedback: avoid continue
>  - Review feedback
>  - 8335771

I think this is okay, a bit annoying to see the workarounds for macOS issues but it should help test stability.

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Marked as reviewed by alanb (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20050#pullrequestreview-2240499705