This has to do with the lock container. The stack trace is as follows:

java.lang.NullPointerException
at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
at org.infinispan.util.concurrent.locks.containers.OwnableReentrantPerEntryLockContainer.getLockFromMap(OwnableReentrantPerEntryLockContainer.java:38)
at org.infinispan.util.concurrent.locks.containers.OwnableReentrantPerEntryLockContainer.ownsLock(OwnableReentrantPerEntryLockContainer.java:28)
at org.infinispan.util.concurrent.locks.LockManagerImpl.ownsLock(LockManagerImpl.java:123)
at org.infinispan.util.concurrent.locks.DeadlockDetectingLockManager.localVsLocalDld(DeadlockDetectingLockManager.java:94)
at org.infinispan.util.concurrent.locks.DeadlockDetectingLockManager.lockAndRecord(DeadlockDetectingLockManager.java:78)
at org.infinispan.container.EntryFactoryImpl.acquireLock(EntryFactoryImpl.java:205)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:148)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:106)
at org.infinispan.interceptors.LockingInterceptor.visitLockControlCommand(LockingInterceptor.java:146)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:136)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:147)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:136)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:147)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:136)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.MarshalledValueInterceptor.visitLockControlCommand(MarshalledValueInterceptor.java:92)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:136)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.TxInterceptor.enlistReadAndInvokeNext(TxInterceptor.java:171)
at org.infinispan.interceptors.TxInterceptor.visitLockControlCommand(TxInterceptor.java:115)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:136)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:58)
at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:39)
at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:147)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:136)
at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:271)
at org.infinispan.CacheDelegate.lock(CacheDelegate.java:296)
at org.infinispan.CacheDelegate.lock(CacheDelegate.java:289)
at test.TestReplace.increase(TestReplace.java:112)
at test.TestReplace.access$000(TestReplace.java:20)
at test.TestReplace$XThread.run(TestReplace.java:95)