Broken key comparator in OptimisticLockingInterceptor

17.01.2012 11:56:53 *ERROR* [main] InvocationContextInterceptor: ISPN000136: Execution error (InvocationContextInterceptor.java, line 123) 
java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at org.infinispan.util.TimSort.mergeHi(TimSort.java:872)
	at org.infinispan.util.TimSort.mergeAt(TimSort.java:489)
	at org.infinispan.util.TimSort.mergeForceCollapse(TimSort.java:430)
	at org.infinispan.util.TimSort.sort(TimSort.java:227)
	at org.infinispan.util.TimSort.sort(TimSort.java:177)
	at org.infinispan.interceptors.locking.OptimisticLockingInterceptor.sort(OptimisticLockingInterceptor.java:252)
	at org.infinispan.interceptors.locking.OptimisticLockingInterceptor.visitPrepareCommand(OptimisticLockingInterceptor.java:94)
	at org.infinispan.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:131)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.infinispan.interceptors.NotificationInterceptor.visitPrepareCommand(NotificationInterceptor.java:58)
	at org.infinispan.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:131)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.infinispan.interceptors.TxInterceptor.visitPrepareCommand(TxInterceptor.java:106)
	at org.infinispan.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:131)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:130)
	at org.infinispan.commands.AbstractVisitor.visitPrepareCommand(AbstractVisitor.java:113)
	at org.infinispan.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:131)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:116)
	at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:76)
	at org.infinispan.commands.AbstractVisitor.visitPrepareCommand(AbstractVisitor.java:113)
	at org.infinispan.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:131)
	at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:345)
	at org.infinispan.transaction.TransactionCoordinator.prepare(TransactionCoordinator.java:129)
	at org.infinispan.transaction.TransactionCoordinator.prepare(TransactionCoordinator.java:111)
	at org.infinispan.transaction.xa.TransactionXaAdapter.commit(TransactionXaAdapter.java:122)
	at com.arjuna.ats.internal.jta.resources.arjunacore.XAResourceRecord.topLevelOnePhaseCommit(XAResourceRecord.java:811)
	at com.arjuna.ats.arjuna.coordinator.BasicAction.onePhaseCommit(BasicAction.java:2656)
	at com.arjuna.ats.arjuna.coordinator.BasicAction.End(BasicAction.java:1784)
	at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:94)
	at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:177)
	at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1423)
	at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:137)