Integrated: 8371502: serviceability/jvmti/vthread/ThreadListStackTracesTest/ThreadListStackTracesTest.java failing

[Serguei Spitsyn]

On Wed, 10 Dec 2025 06:00:47 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> 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

This pull request has now been integrated.

Changeset: c46bed72
Author:    Serguei Spitsyn <sspitsyn at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/c46bed7292aad21b8cf9defcccac43c010a1f116
Stats:     9 lines in 1 file changed: 7 ins; 0 del; 2 mod

8371502: serviceability/jvmti/vthread/ThreadListStackTracesTest/ThreadListStackTracesTest.java failing

Reviewed-by: lmesnik, amenkov

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PR: https://git.openjdk.org/jdk/pull/28734