RFR: 8305906: HttpClient may use incorrect key when finding pooled HTTP/2 connection for IPv6 address [v3]

[Daniel Fuchs]

On Fri, 21 Apr 2023 01:26:35 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

>> Can I please get a review of this change which proposes to fix the issue reported in https://bugs.openjdk.org/browse/JDK-8305906?
>> 
>> As noted in that issue, when IPv6 hosts are involved, the HttpClient on certain occasions can end up caching the connection with a key which doesn't match with the key which is then used in a subsequent request against the same target host. 
>> 
>> The commit in this PR now wraps the IPv6 address in a square bracket consistently so that the correct key is used both during storing the connection in the pool and when looking up.
>> 
>> A new jtreg test has been added which reproduces this issue without the fix and verifies the fix.
>
> Jaikiran Pai has updated the pull request incrementally with one additional commit since the last revision:
> 
>   wrapping into brackets is no longer needed

Marked as reviewed by dfuchs (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/13456#pullrequestreview-1465411030