On Thu, 11 Dec 2025 02:36:12 GMT, Serguei Spitsyn <[email protected]> wrote:

>> This fixes the test which is unreliable and fails intermittently from time 
>> to time.
>> The test was failing in the method `checkReentrantLock()` when comparing the 
>> expected state with result from `vt.getState()`. The issue is that the call 
>> to `ThreadListStackTracesTest.reentrantLock.lock()` in a 
>> `ReentrantLockTestTask` can reach waiting state on some class loading but 
>> not on the ReentrantLock. Please see the first comment for test sources 
>> details.
>> The fix is to add a big enough sleep before call to the checkStates().
>> 
>> Testing:
>>  - submitted about thousands of mach5 runs of the 
>> `ThreadListStackTracesTest` test runs before and after the fix
>>  - TBD: submit mach5 tiers 1-3 to be completely safe
>
> Serguei Spitsyn has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   review: use ReentrantLock.hasQueuedThread()

Looks good. Thank you for explanation.

-------------

Marked as reviewed by lmesnik (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28734#pullrequestreview-3565635342

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