The following tests failed in the JDK15 CI:

vmTestbase/gc/lock/jvmti/alloc/jvmtialloclock02/TestDescription.java
vmTestbase/vm/gc/compact/Humongous_NonbranchyTree/TestDescription.java
vmTestbase/gc/lock/malloc/malloclock03/TestDescription.java
vmTestbase/gc/lock/jvmti/alloc/jvmtialloclock02/TestDescription.java
vmTestbase/gc/lock/jniref/jnireflock04/TestDescription.java

These tests failed due to either "java.lang.IllegalMonitorStateException"
or "java.lang.OutOfMemoryError" or both. These failure happened on
several different test machines in the same Tier8 job set, but not the
same task.

Here's a snippet from one of the jvmtialloclock02 failure logs:

----------System.err:(54/3817)----------

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "gc.lock.LockerTest$Worker@14ccfd4a"

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "gc.lock.LockerTest$Worker@5dceaa80"

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "gc.lock.LockerTest$Worker@747fbb5a"

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "gc.lock.LockerTest$Worker@4c5f88cc"

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "gc.lock.LockerTest$Worker@3c224189"
java.lang.IllegalMonitorStateException
at java.base/java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:175)
at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1006)
at java.base/java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:494)
at nsk.share.Wicket.waitFor(Wicket.java:134)
at nsk.share.runner.ThreadsRunner$ManagedThread.run(ThreadsRunner.java:100)
at java.base/java.lang.Thread.run(Thread.java:832)
java.lang.OutOfMemoryError: Java heap space


Here's a snippet from one of the Humongous_NonbranchyTree logs:

----------System.err:(24/1758)----------
java.lang.IllegalMonitorStateException
at java.base/java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:175)
at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1006)
at java.base/java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:494)
at nsk.share.Wicket.waitFor(Wicket.java:134)
at nsk.share.runner.ThreadsRunner$ManagedThread.run(ThreadsRunner.java:100)
at java.base/java.lang.Thread.run(Thread.java:832)
java.lang.IllegalMonitorStateException
at java.base/java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:175)
at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1006)
at java.base/java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:494)
at nsk.share.Wicket.waitFor(Wicket.java:134)
at nsk.share.runner.ThreadsRunner$ManagedThread.run(ThreadsRunner.java:100)
at java.base/java.lang.Thread.run(Thread.java:832)
java.lang.IllegalMonitorStateException
at java.base/java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:175)
at java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1006)
at java.base/java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:494)
at nsk.share.Wicket.waitFor(Wicket.java:134)
at nsk.share.runner.ThreadsRunner$ManagedThread.run(ThreadsRunner.java:100)
at java.base/java.lang.Thread.run(Thread.java:832)
STATUS:Failed.STATUS:Failed.STATUS:Failed.`main' threw exception: java.lang.IllegalMonitorStateException
`main' threw exception: java.lang.IllegalMonitorStateException
`main' threw exception: java.lang.IllegalMonitorStateException
----------rerun:(43/6871)*----------


Here's a snippet from the malloclock03 log:

----------System.err:(2/126)----------
java.lang.OutOfMemoryError: Java heap space
STATUS:Failed.`main' threw exception: java.lang.OutOfMemoryError: Java heap space
----------rerun:(44/6865)*----------


Unfortunately, the Tier8 has 77 changesets in it so
it's not going to be easy to narrow this one down.