RFR: 8313655: sun/tools/jhsdb/HeapDumpTestWithActiveProcess.java frequently fails with SerialGC

[Chris Plummer]

On Fri, 8 Aug 2025 09:32:51 GMT, Ramkumar Sunderbabu <rsunderbabu at openjdk.org> wrote:

> VM argument UseSerialGC was not allowed while launching the debuggee process due to classloader related issue. During the effort to improve the test's handling of the issue, it was observed that SerialGC doesn't cause any issue any more. This could possibly due to improved handling of ClassLoaderData or SerialGC.
> After extensively testing the argument in various platforms and for many iterations, it was decided to allow the argument here on.
> 
> Testing: Tiers1,2,3 and other ties where the test runs.

The changes are fine, but I'm not so sure it is appropriate to use JDK-8313655 for this PR. Perhaps create a subtask to re-enable SerialGC use, and close JDK-8313655 as "Cannot Reproduce"

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PR Review: https://git.openjdk.org/jdk/pull/26690#pullrequestreview-3101036718