[jdk21u-dev] RFR: 8339238: Update to use jtreg 7.5.1

[Adam Farley]

On Mon, 9 Feb 2026 14:23:57 GMT, Adam Farley <afarley at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [9042aa82](https://github.com/openjdk/jdk25u-dev/commit/9042aa82a890b0f0348ac8127dbd3268f2620346) from the [openjdk/jdk25u-dev](https://github.com/openjdk/jdk25u-dev) repository.
> 
> The commit being backported was authored by Christian Stein on 19 Feb 2025 and was reviewed by Erik Joelsson, Jaikiran Pai, Roger Riggs and Iris Clark.
> 
> Thanks!

Testing running here: https://github.com/adamfarley/jdk21u-dev/actions/runs/21829010953

Note: this PR should resolve https://bugs.openjdk.org/browse/JDK-8376188

Also, there was a single conflict when backporting the change to docs/TEST.ROOT, because that file and directory do not exist in JDK21.

I made sure that this commit changes every file touched by the previous jtreg version change in this repository:

https://github.com/openjdk/jdk21u-dev/commit/9e29f47c06129e1198b323a752b717bbb29de98f

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/2605#issuecomment-3872061819
PR Comment: https://git.openjdk.org/jdk21u-dev/pull/2605#issuecomment-3872099845