Cache ends up with null values

java.lang.NullPointerException
	at org.infinispan.container.EntryFactoryImpl.wrapEntryForPut(EntryFactoryImpl.java:151)
	at org.infinispan.interceptors.EntryWrappingInterceptor.visitPutKeyValueCommand(EntryWrappingInterceptor.java:132)
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.infinispan.interceptors.locking.OptimisticLockingInterceptor.visitPutKeyValueCommand(OptimisticLockingInterceptor.java:117)
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
	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.visitPutKeyValueCommand(AbstractVisitor.java:61)
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.infinispan.interceptors.MarshalledValueInterceptor.visitPutKeyValueCommand(MarshalledValueInterceptor.java:154)
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.infinispan.interceptors.TxInterceptor.enlistWriteAndInvokeNext(TxInterceptor.java:222)
	at org.infinispan.interceptors.TxInterceptor.visitPutKeyValueCommand(TxInterceptor.java:160)
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
	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.visitPutKeyValueCommand(AbstractVisitor.java:61)
	at org.infinispan.interceptors.IsMarshallableInterceptor.visitPutKeyValueCommand(IsMarshallableInterceptor.java:108)
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
	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.visitPutKeyValueCommand(AbstractVisitor.java:61)
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
	at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:130)
	at org.hibernate.cache.infinispan.impl.ClassLoaderAwareCache$ClassLoaderAwareCommandInterceptor.handleDefault(ClassLoaderAwareCache.java:77)
	at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:61)
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
	at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:345)
	at org.infinispan.CacheImpl.executeCommandAndCommitIfNeeded(CacheImpl.java:934)
	at org.infinispan.CacheImpl.putIfAbsent(CacheImpl.java:660)
	at org.infinispan.CacheImpl.putForExternalRead(CacheImpl.java:340)
	at org.infinispan.CacheImpl.putForExternalRead(CacheImpl.java:324)
	at org.infinispan.AbstractDelegatingCache.putForExternalRead(AbstractDelegatingCache.java:54)
	at org.hibernate.cache.infinispan.util.CacheAdapterImpl.putForExternalRead(CacheAdapterImpl.java:126)

2012-01-03 19:07:33,888 6368  TRACE [org.infinispan.container.EntryFactoryImpl] (main:org.hibernate.test.cache.infinispan.functional.Item) Retrieved from 
container ImmortalCacheEntry{key=MarshalledValue{instance=org.hibernate.test.cache.infinispan.functional.Item#3, serialized=false, cachedHashCode=3}@6d386751, 
value=ImmortalCacheValue{value=null}}