[8u] [1/2] RFR backport of 8223490: Optimize search algorithm for determining default time zone

[Yuri Nesterenko]

Hi David,

could you please consider a small change from

https://bugs.openjdk.java.net/browse/JDK-8234591 ? 
It may be even more important for jdk8.

Thanks,
--yan

On 05.12.2019 01:38, David Alvarez wrote:
> Hi,
>
> I would like to request a backport of JDK-8223490.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8223490
> Original: https://hg.openjdk.java.net/jdk/jdk/rev/8ee083465318
> Webrev: http://cr.openjdk.java.net/~alvdavi/webrevs/8223490/webrev.8u.00/
>
> The patch is marked as 8u241 but not yet in openjdk8u242.
>
> Patch did not apply cleanly, multiple modifications were required.
>
> jkd8u missing JDK-8202794 [1] meant we still had the dirent64 *entry
> around and references to readdir64_r. We also don't have JDK-7153347 [2]
> which added multiple changes to the original findZoneInfoFile method.
> Nor do we have JDK-8214077 [3] that changed statbuf to a stat64. It is
> possible these are not the only ones.
>
> This patch will be followed up by a backport of JDK-8231124 which is a
> follow up.
>
> I've run Tier1 and Tier2 tests, no regressions found. Additionally, I've
> been able to test on an affected system, where ZoneId.systemDefault()
> was returning Zulu before the patch, and UTC after.
>
> Thanks,
>
> David
>
> --
> [1] https://bugs.openjdk.java.net/browse/JDK-8202794
> [2] http://hg.openjdk.java.net/jdk10/jdk10/jdk/rev/4887534fa39b
> [3] https://bugs.openjdk.java.net/browse/JDK-8214077
> [4] https://bugs.openjdk.java.net/browse/JDK-8231124
>
>
>
>