Deadlock in JBOSS Transaction Reaper

Found one Java-level deadlock:
=============================
"Timer-93":
waiting to lock monitor 0x00007f8fac190cf8 (object 0x00000000d6d50830, a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction),
which is held by "Transaction Reaper Worker 0"
"Transaction Reaper Worker 0":
waiting for ownable synchronizer 0x00000000d6861408, (a java.util.concurrent.locks.ReentrantLock$FairSync),
which is held by "Timer-93"
Java stack information for the threads listed above:
===================================================
"Timer-93":
at com.arjuna.ats.arjuna.coordinator.BasicAction.Abort(BasicAction.java:1573)

• waiting to lock <0x00000000d6d50830> (a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction)
  at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:118)
  at com.arjuna.ats.arjuna.AtomicAction.abort(AtomicAction.java:188)
  at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.rollbackAndDisassociate(TransactionImple.java:1247)
  at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.rollback(BaseTransaction.java:134)
  at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.rollback(BaseTransactionManagerDelegate.java:114)
  at org.jboss.as.ejb3.inflow.MessageEndpointInvocationHandler.afterDelivery(MessageEndpointInvocationHandler.java:70)
  at sun.reflect.GeneratedMethodAccessor1756.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  at java.lang.reflect.Method.invoke(Unknown Source)
  at org.jboss.as.ejb3.inflow.AbstractInvocationHandler.handle(AbstractInvocationHandler.java:60)
  at org.jboss.as.ejb3.inflow.MessageEndpointInvocationHandler.doInvoke(MessageEndpointInvocationHandler.java:136)
  at org.jboss.as.ejb3.inflow.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:73)
  at com.sun.proxy.$Proxy852.afterDelivery(Unknown Source)
  at sunrise.ra.aq.inbound.AqServerSession.run(AqServerSession.java:141)
  at java.util.TimerThread.mainLoop(Unknown Source)
  at java.util.TimerThread.run(Unknown Source)

"Transaction Reaper Worker 0":
at sun.misc.Unsafe.park(Native Method)

• parking to wait for <0x00000000d6861408> (a java.util.concurrent.locks.ReentrantLock$FairSync)
  at java.util.concurrent.locks.LockSupport.park(Unknown Source)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(Unknown Source)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(Unknown Source)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(Unknown Source)
  at java.util.concurrent.locks.ReentrantLock$FairSync.lock(Unknown Source)
  at java.util.concurrent.locks.ReentrantLock.lock(Unknown Source)
  at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.lock(BaseWrapperManagedConnection.java:361)
  at org.jboss.jca.adapters.jdbc.xa.XAManagedConnection.end(XAManagedConnection.java:290)
  at org.jboss.jca.core.tx.jbossts.XAResourceWrapperImpl.end(XAResourceWrapperImpl.java:99)
  at com.arjuna.ats.internal.jta.resources.arjunacore.XAResourceRecord.topLevelAbort(XAResourceRecord.java:312)
  at com.arjuna.ats.arjuna.coordinator.BasicAction.doAbort(BasicAction.java:2874)
  at com.arjuna.ats.arjuna.coordinator.BasicAction.doAbort(BasicAction.java:2853)
  at com.arjuna.ats.arjuna.coordinator.BasicAction.Abort(BasicAction.java:1616)
• locked <0x00000000d6d50830> (a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction)
  at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:118)
  at com.arjuna.ats.arjuna.AtomicAction.cancel(AtomicAction.java:217)
  at com.arjuna.ats.arjuna.coordinator.TransactionReaper.doCancellations(TransactionReaper.java:370)
  at com.arjuna.ats.internal.arjuna.coordinator.ReaperWorkerThread.run(ReaperWorkerThread.java:78)
  Found 1 deadlock.