RFR: 8373643: Test serviceability/jvmti/vthread/ThreadListStackTracesTest/ThreadListStackTracesTest.java still failing [v2]

[Serguei Spitsyn]

On Sat, 10 Jan 2026 00:59:54 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
>
> Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review: tweak one of the comments

Thank you for review, Leonid!

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PR Comment: https://git.openjdk.org/jdk/pull/29102#issuecomment-3732146134