[jdk11u-dev] RFR: 8244508: JFR: FlightRecorderOptions reset date format

[Pushkar N Kulkarni]

On Tue, 5 Sep 2023 11:07:20 GMT, Pushkar N Kulkarni <duke at openjdk.org> wrote:

> Hello all,
> 
> This backport request is related to JDK-8244508 [1]. When using JFR (`-XX:StartFlightRecording`), the configured default Locale is not honored, with FormatData or TimezoneNames(for example), because the relevant ResourceBundles do not get loaded when an attempt is made to locate and load them during VM startup (i.e when  `-XX:StartFlightRecording` triggers JFR initialiazation). Though [1] quotes a mailing-list post [2] mentioning this issue was not seen with jdk11 then, the testcase in [1] does fail with 11.0.20 (as well as 11.0.22/master branch) as of today:
> 
> 
> $ java --show-version -Duser.country=DE -Duser.language=de -XX:FlightRecorderOptions=stackdepth=128 Main
> openjdk 11.0.22-internal 2024-01-16
> OpenJDK Runtime Environment (build 11.0.22-internal+0-adhoc.pushkarnk.jdk11u-dev)
> OpenJDK 64-Bit Server VM (build 11.0.22-internal+0-adhoc.pushkarnk.jdk11u-dev, mixed mode)
> expected: 01.01.2020, 00:00:00
> actual:   2020 Jan 1 00:00:00 
> 
> Testing: Linux x86-64 build, tier1 tests with `release` and `fastdebug` builds.
> 
> [1] https://bugs.openjdk.org/browse/JDK-8244508
> [2] https://mail.openjdk.org/pipermail/hotspot-jfr-dev/2020-March/001313.html

I requested for this backport because an Ubuntu user reported this bug of JFR not honoring a configured default Locale. Locally, I ran the tier1 tests on Linux x86-64 with `release` and `fastdebug` builds.

`/integrate`

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PR Comment: https://git.openjdk.org/jdk11u-dev/pull/2121#issuecomment-1818847704
PR Comment: https://git.openjdk.org/jdk11u-dev/pull/2121#issuecomment-1818848295