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8384514: Shenandoah: gc/shenandoah/mxbeans/TestCycleEndMessage.java intermittent fails

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Reviewed-by: shade, kdnilsen
This commit is contained in:
William Kemper 2026-05-19 21:57:34 +00:00
parent a37b02baa2
commit 288d88f76c
1 changed files with 30 additions and 5 deletions
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35
test/hotspot/jtreg/gc/shenandoah/mxbeans/TestCycleEndMessage.java
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@ -43,10 +43,16 @@ import javax.management.openmbean.CompositeData;
import com.sun.management.GarbageCollectionNotificationInfo;
import static java.util.concurrent.TimeUnit.SECONDS;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
public class TestCycleEndMessage {
public static void main(String[] args) throws Exception {
final AtomicBoolean foundGenerationInCycle = new AtomicBoolean(false);
final AtomicBoolean oneCycleCompleted = new AtomicBoolean(false);
final Object lock = new Object();
NotificationListener listener = new NotificationListener() {
@Override
@ -59,9 +65,15 @@ public class TestCycleEndMessage {
System.out.println("Received: " + name + " / " + action);
if (name.equals("Shenandoah Cycles") &&
(action.contains("Global") || action.contains("Young") || action.contains("Old"))) {
foundGenerationInCycle.set(true);
if (name.equals("Shenandoah Cycles")) {
oneCycleCompleted.set(true);
if ((action.contains("Global") || action.contains("Young") || action.contains("Old"))) {
foundGenerationInCycle.set(true);
}
synchronized (lock) {
lock.notifyAll();
}
}
}
}
@ -71,8 +83,21 @@ public class TestCycleEndMessage {
((NotificationEmitter) bean).addNotificationListener(listener, null, null);
}
System.gc();
Thread.sleep(2000);
synchronized (lock) {
System.gc();
long deadline = System.nanoTime() + SECONDS.toNanos(5);
while (!oneCycleCompleted.get()) {
long remaining = NANOSECONDS.toMillis(deadline - System.nanoTime());
if (remaining <= 0) {
break;
}
lock.wait(remaining);
}
}
if (!oneCycleCompleted.get()) {
throw new IllegalStateException("Test did not complete at least one GC cycle");
}
if (!foundGenerationInCycle.get()) {
throw new IllegalStateException("Expected to find generation name (Global/Young/Old) in Shenandoah Cycles action message");