[jdk24] RFR: 8347817: Timeouts running test/jdk/java/lang/String/concat/HiddenClassUnloading.java with fastdebug builds

[Martin Doerr]

On Wed, 22 Jan 2025 08:30:16 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

> Hi all,
> 
> I would like to backport the test-fix from  commit [15d6469e](https://github.com/openjdk/jdk/commit/15d6469e8da635364c0ba83e425fd149c2d69495) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> The backport will help prevent frequent tier1 test timeouts in our CI testing.
> 
> The commit being backported was authored by Richard Reingruber on 22 Jan 2025 and was reviewed by Christoph Langer, Matthias Baesken and Martin Doerr.
> 
> Thanks, Richard.

LGTM. Thanks for backporting!

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Marked as reviewed by mdoerr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23228#pullrequestreview-2567011671