RFR: 8373643: Test serviceability/jvmti/vthread/ThreadListStackTracesTest/ThreadListStackTracesTest.java still failing

[Serguei Spitsyn]

On Thu, 8 Jan 2026 01:07:45 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

> The test is still failing after the fix of [JDK-8371502](https://bugs.openjdk.org/browse/JDK-8371502). I suspect the issue is in the `ReentrantLock` implementation but suggest to make one more update of this test to make it more clear.
> The test update includes the following changes:
>  - update method `ensureReadyAndWaiting()`:
>     - add `sleep(50)` at start of method
>     - replace call to `rlock.hasQueuedThreads()` with call to `rlock.hasQueuedThread(vt)`
>  - update method `checkStates()` to make it more stable and tracing output more clear
>  
>  Testing:
>   - TBD: mach5 tiers 1-3

This fix is a second correction of the test to make the output more clear. I wonder if it can be qualified as trivial.

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PR Comment: https://git.openjdk.org/jdk/pull/29102#issuecomment-3731187326