org.infinispan.transaction.WriteSkewException: Detected write skew.

2013-02-25 14:26:25,071 WARN [RepeatableReadEntry] (EntryWriter-9, WriteSkewTest) ISPN000005: Detected write skew on key [k]. Another process has changed the entry since we last read it! Unable to copy entry for update.
2013-02-25 14:26:25,073 ERROR [WriteSkewTest] (EntryWriter-9, WriteSkewTest) Unexpected
org.infinispan.transaction.WriteSkewException: Detected write skew.
at org.infinispan.container.entries.RepeatableReadEntry.performLocalWriteSkewCheck(RepeatableReadEntry.java:68)
at org.infinispan.container.entries.RepeatableReadEntry.copyForUpdate(RepeatableReadEntry.java:52)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForPut(EntryFactoryImpl.java:170)
at org.infinispan.interceptors.EntryWrappingInterceptor.visitPutKeyValueCommand(EntryWrappingInterceptor.java:164)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.locking.OptimisticLockingInterceptor.visitPutKeyValueCommand(OptimisticLockingInterceptor.java:142)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
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.visitPutKeyValueCommand(AbstractVisitor.java:62)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.TxInterceptor.enlistWriteAndInvokeNext(TxInterceptor.java:251)
at org.infinispan.interceptors.TxInterceptor.visitPutKeyValueCommand(TxInterceptor.java:191)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:128)
at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:92)
at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:62)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:77)
at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:343)
at org.infinispan.CacheImpl.executeCommandAndCommitIfNeeded(CacheImpl.java:1169)
at org.infinispan.CacheImpl.putInternal(CacheImpl.java:766)
at org.infinispan.CacheImpl.put(CacheImpl.java:760)
at org.infinispan.CacheImpl.put(CacheImpl.java:754)
at org.infinispan.CacheSupport.put(CacheSupport.java:53)
at org.infinispan.api.mvcc.repeatable_read.WriteSkewTest$EntryWriter.call(WriteSkewTest.java:433)
at org.infinispan.api.mvcc.repeatable_read.WriteSkewTest$EntryWriter.call(WriteSkewTest.java:418)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)