The submitter's Server enters into a critical state with several threads stuck in attempting to acquire lock java.util.concurrent.locks.ReentrantLock$NonfairSync

Error-Stack Obtained / Diagnostic Analysis:
-------------------------------------------
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000006a79c1a48> (a
java.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
at oracle.jbo.mom.DefinitionContext.lock(DefinitionContext.java:550)
at oracle.jbo.mom.DefinitionManager.getSiteLock(DefinitionManager.java:4710)
at oracle.jbo.mom.DefinitionManager.lockDefinitionContext(DefinitionManager.java:4667)
at oracle.jbo.mom.DefinitionContextAgeable.cleanNullRefs(DefinitionContextAgeable.java:253)


Although these logs don't show the threads stuck on lock NonfairSync there
are several threads waiting for the NonfairSync lock but no thread in the
logs is holding that lock (0x00000006a79c1a48) .