Test: java/util/concurrent/Exchanger/ExchangeLoops.java

----------System.out:(4/101)----------
Warmup...
Threads: 2 : 1287 ns per transfer
Threads: 3 : 670 ns per transfer
Threads: 5 :
result: Error. "main" action timed out with a timeout of 960 seconds on agent 6


{
  "threadDump": {
    "processId": "3976241",
    "time": "2025-03-09T04:39:46.650040850Z",
    "runtimeVersion": "25-ea+13-LTS-1395",
    "threadContainers": [
      {
        "container": "<root>",
        "parent": null,
        "owner": null,
        "threads": [
         {
           "tid": "3",
           "name": "main",
           "stack": [
              "java.base\/java.lang.Object.wait0(Native Method)",
              "java.base\/java.lang.Object.wait(Object.java:389)",
              "java.base\/java.lang.Thread.join(Thread.java:1860)",
              "java.base\/java.lang.Thread.join(Thread.java:1936)",
              "com.sun.javatest.regtest.agent.MainActionHelper.runClass(MainActionHelper.java:219)",
              "com.sun.javatest.regtest.agent.AgentServer.doMain(AgentServer.java:319)",
              "com.sun.javatest.regtest.agent.AgentServer.run(AgentServer.java:244)",
              "com.sun.javatest.regtest.agent.AgentServer.main(AgentServer.java:71)"
           ]
         },
         {
           "tid": "11",
           "name": "Reference Handler",
           "stack": [
              "java.base\/java.lang.ref.Reference.waitForReferencePendingList(Native Method)",
              "java.base\/java.lang.ref.Reference.processPendingReferences(Reference.java:246)",
              "java.base\/java.lang.ref.Reference$ReferenceHandler.run(Reference.java:208)"
           ]
         },
         {
           "tid": "12",
           "name": "Finalizer",
           "stack": [
              "java.base\/java.lang.Object.wait0(Native Method)",
              "java.base\/java.lang.Object.wait(Object.java:389)",
              "java.base\/java.lang.Object.wait(Object.java:351)",
              "java.base\/java.lang.ref.ReferenceQueue.remove0(ReferenceQueue.java:138)",
              "java.base\/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:229)",
              "java.base\/java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:165)"
           ]
         },
         {
           "tid": "13",
           "name": "Signal Dispatcher",
           "stack": [
           ]
         },
         {
           "tid": "20",
           "name": "Common-Cleaner",
           "stack": [
              "java.base\/java.lang.Object.wait0(Native Method)",
              "java.base\/java.lang.Object.wait(Object.java:389)",
              "java.base\/java.lang.ref.ReferenceQueue.remove0(ReferenceQueue.java:124)",
              "java.base\/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:215)",
              "java.base\/jdk.internal.ref.CleanerImpl.run(CleanerImpl.java:140)",
              "java.base\/java.lang.Thread.run(Thread.java:1447)",
              "java.base\/jdk.internal.misc.InnocuousThread.run(InnocuousThread.java:148)"
           ]
         },
         {
           "tid": "21",
           "name": "Notification Thread",
           "stack": [
           ]
         },
         {
           "tid": "188",
           "name": "AgentVMThread",
           "stack": [
              "java.base\/jdk.internal.misc.Unsafe.park(Native Method)",
              "java.base\/java.util.concurrent.locks.LockSupport.park(LockSupport.java:369)",
              "java.base\/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:519)",
              "java.base\/java.util.concurrent.ForkJoinPool.unmanagedBlock(ForkJoinPool.java:3945)",
              "java.base\/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3891)",
              "java.base\/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1751)",
              "java.base\/java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:236)",
              "java.base\/java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:364)",
              "ExchangeLoops.oneRun(ExchangeLoops.java:137)",
              "ExchangeLoops.main(ExchangeLoops.java:73)",
              "java.base\/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)",
              "java.base\/java.lang.reflect.Method.invoke(Method.java:565)",
              "com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:335)",
              "java.base\/java.lang.Thread.run(Thread.java:1447)"
           ]
         },
         {
           "tid": "196",
           "name": "Attach Listener",
           "stack": [
              "java.base\/java.lang.Thread.getStackTrace(Thread.java:2166)",
              "java.base\/jdk.internal.vm.ThreadDumper.dumpThreadToJson(ThreadDumper.java:270)",
              "java.base\/jdk.internal.vm.ThreadDumper.dumpThreadsToJson(ThreadDumper.java:242)",
              "java.base\/jdk.internal.vm.ThreadDumper.dumpThreadsToJson(ThreadDumper.java:206)",
              "java.base\/jdk.internal.vm.ThreadDumper.dumpThreadsToFile(ThreadDumper.java:117)",
              "java.base\/jdk.internal.vm.ThreadDumper.dumpThreadsToJson(ThreadDumper.java:85)"
           ]
         }
        ],
        "threadCount": "8"
      },
      {
        "container": "java.util.concurrent.ThreadPoolExecutor@48b50357",
        "parent": "<root>",
        "owner": null,
        "threads": [
         {
           "tid": "191",
           "name": "pool-5-thread-3",
           "stack": [
              "java.base\/jdk.internal.misc.Unsafe.park(Native Method)",
              "java.base\/java.util.concurrent.locks.LockSupport.park(LockSupport.java:223)",
              "java.base\/java.util.concurrent.Exchanger.xchg(Exchanger.java:397)",
              "java.base\/java.util.concurrent.Exchanger.exchange(Exchanger.java:475)",
              "ExchangeLoops$Stage.run(ExchangeLoops.java:110)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)",
              "java.base\/java.lang.Thread.run(Thread.java:1447)"
           ]
         },
         {
           "tid": "192",
           "name": "pool-5-thread-4",
           "stack": [
              "java.base\/jdk.internal.misc.Unsafe.park(Native Method)",
              "java.base\/java.util.concurrent.locks.LockSupport.park(LockSupport.java:223)",
              "java.base\/java.util.concurrent.Exchanger.xchg(Exchanger.java:397)",
              "java.base\/java.util.concurrent.Exchanger.exchange(Exchanger.java:475)",
              "ExchangeLoops$Stage.run(ExchangeLoops.java:110)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)",
              "java.base\/java.lang.Thread.run(Thread.java:1447)"
           ]
         },
         {
           "tid": "193",
           "name": "pool-5-thread-5",
           "stack": [
              "java.base\/jdk.internal.misc.Unsafe.park(Native Method)",
              "java.base\/java.util.concurrent.locks.LockSupport.park(LockSupport.java:223)",
              "java.base\/java.util.concurrent.Exchanger.xchg(Exchanger.java:397)",
              "java.base\/java.util.concurrent.Exchanger.exchange(Exchanger.java:475)",
              "ExchangeLoops$Stage.run(ExchangeLoops.java:102)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)",
              "java.base\/java.lang.Thread.run(Thread.java:1447)"
           ]
         },
         {
           "tid": "194",
           "name": "pool-5-thread-6",
           "stack": [
              "java.base\/jdk.internal.misc.Unsafe.park(Native Method)",
              "java.base\/java.util.concurrent.locks.LockSupport.park(LockSupport.java:223)",
              "java.base\/java.util.concurrent.Exchanger.xchg(Exchanger.java:397)",
              "java.base\/java.util.concurrent.Exchanger.exchange(Exchanger.java:475)",
              "ExchangeLoops$Stage.run(ExchangeLoops.java:102)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)",
              "java.base\/java.lang.Thread.run(Thread.java:1447)"
           ]
         },
         {
           "tid": "195",
           "name": "pool-5-thread-7",
           "stack": [
              "java.base\/jdk.internal.misc.Unsafe.park(Native Method)",
              "java.base\/java.util.concurrent.locks.LockSupport.park(LockSupport.java:223)",
              "java.base\/java.util.concurrent.Exchanger.xchg(Exchanger.java:397)",
              "java.base\/java.util.concurrent.Exchanger.exchange(Exchanger.java:475)",
              "ExchangeLoops$Stage.run(ExchangeLoops.java:102)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)",
              "java.base\/java.lang.Thread.run(Thread.java:1447)"
           ]
         }
        ],
        "threadCount": "5"
      },
      {
        "container": "java.util.concurrent.ScheduledThreadPoolExecutor@57e1b0c",
        "parent": "<root>",
        "owner": null,
        "threads": [
         {
           "tid": "22",
           "name": "pool-1-thread-1",
           "stack": [
              "java.base\/jdk.internal.misc.Unsafe.park(Native Method)",
              "java.base\/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:271)",
              "java.base\/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:1802)",
              "java.base\/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1166)",
              "java.base\/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:883)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1016)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)",
              "java.base\/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)",
              "java.base\/java.lang.Thread.run(Thread.java:1447)"
           ]
         }
        ],
        "threadCount": "1"
      },
      {
        "container": "java.util.concurrent.ThreadPoolExecutor@6c5b45fc",
        "parent": "<root>",
        "owner": null,
        "threads": [
        ],
        "threadCount": "0"
      },
      {
        "container": "ForkJoinPool.commonPool\/jdk.internal.vm.SharedThreadContainer@18d1060b",
        "parent": "<root>",
        "owner": null,
        "threads": [
        ],
        "threadCount": "0"
      }
    ]
  }
}

Unclear if it is hung or just slow.

Test flags:

 -Dtest.java.opts='-ea -esa -XX:CompileThreshold=100 -XX:+UnlockExperimentalVMOptions -XX:TieredStopAtLevel=1'