jdk24 OpenJDK java/lang/Thread/virtual/Reflection timeout

[pshipton]

https://openj9-jenkins.osuosl.org/job/Test_openjdk24_j9_sanity.openjdk_x86-64_linux_Nightly_testList_1/3/
jdk_lang_1
java/lang/Thread/virtual/Reflection.java - timeout

01:52:43  "pool-1-thread-1" prio=5 Id=23 TIMED_WAITING
01:52:43  	at java.base@24-internal/jdk.internal.misc.Unsafe.park(Native Method)
01:52:43  	at java.base@24-internal/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:271)
01:52:43  	at java.base@24-internal/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:1802)
01:52:43  	at java.base@24-internal/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1166)
01:52:43  	at java.base@24-internal/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:883)
01:52:43  	at java.base@24-internal/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1021)
01:52:43  	at java.base@24-internal/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
01:52:43  	at java.base@24-internal/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:619)
01:52:43  	at java.base@24-internal/java.lang.Thread.run(Thread.java:1458)
01:52:43  
01:52:43  "VirtualThread-unblocker" prio=5 Id=25 RUNNABLE
01:52:43  	at java.base@24-internal/java.lang.VirtualThread.takeVirtualThreadListToUnblock(Native Method)
01:52:43  	at java.base@24-internal/java.lang.VirtualThread.unblockVirtualThreads(VirtualThread.java:1498)
01:52:43  	at java.base@24-internal/java.lang.Thread.run(Thread.java:1458)
01:52:43  	at java.base@24-internal/jdk.internal.misc.InnocuousThread.run(InnocuousThread.java:148)
01:52:43  
01:52:43  "AgentVMThread" prio=5 Id=334 WAITING
01:52:43  	at java.base@24-internal/jdk.internal.misc.Unsafe.park(Native Method)
01:52:43  	at java.base@24-internal/java.util.concurrent.locks.LockSupport.park(LockSupport.java:223)
01:52:43  	at java.base@24-internal/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:789)
01:52:43  	at java.base@24-internal/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1138)
01:52:43  	at java.base@24-internal/java.util.concurrent.CountDownLatch.await(CountDownLatch.java:230)
01:52:43  	at java.base@24-internal/java.lang.VirtualThread.joinNanos(VirtualThread.java:1004)
01:52:43  	at java.base@24-internal/java.lang.Thread.join(Thread.java:1878)
01:52:43  	at java.base@24-internal/java.lang.Thread.join(Thread.java:1971)
01:52:43  	at Reflection.testInvokeStatic6(Reflection.java:167)

[babsingh]

The test times out due to the lack of VirtualThread (VT) pinning support. Once OpenJ9 implements VT pinning, the top two methods in the stack trace below (unblockVirtualThreads and takeVirtualThreadListToUnblock) should function correctly, resolving the issue.

01:52:43  "VirtualThread-unblocker" prio=5 Id=25 RUNNABLE
01:52:43  	at java.base@24-internal/java.lang.VirtualThread.takeVirtualThreadListToUnblock(Native Method)
01:52:43  	at java.base@24-internal/java.lang.VirtualThread.unblockVirtualThreads(VirtualThread.java:1498)
01:52:43  	at java.base@24-internal/java.lang.Thread.run(Thread.java:1458)
01:52:43  	at java.base@24-internal/jdk.internal.misc.InnocuousThread.run(InnocuousThread.java:148)

Assigning it to @fengxue-IS since it is related to VT pinning support.

[pshipton]

https://openj9-jenkins.osuosl.org/job/Test_openjdk24_j9_sanity.openjdk_s390x_linux_Nightly_testList_0/12