NPE in SingleFileStore

2013-09-13 16:55:58,131 ERROR (testng-ExpiryTest) [org.infinispan.persistence.PersistenceUtil] ISPN000252: Error executing parallel store task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
	at java.util.concurrent.FutureTask.get(FutureTask.java:111)
	at org.infinispan.persistence.PersistenceUtil.waitForAllTasksToComplete(PersistenceUtil.java:78)
	at org.infinispan.persistence.file.SingleFileStore.process(SingleFileStore.java:443)
	at org.infinispan.persistence.manager.PersistenceManagerImpl.processOnAllStores(PersistenceManagerImpl.java:387)
	at org.infinispan.interceptors.CacheLoaderInterceptor.visitEntrySetCommand(CacheLoaderInterceptor.java:189)
	at org.infinispan.commands.read.EntrySetCommand.acceptVisitor(EntrySetCommand.java:42)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)
	at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:112)
	at org.infinispan.commands.AbstractVisitor.visitEntrySetCommand(AbstractVisitor.java:89)
	at org.infinispan.commands.read.EntrySetCommand.acceptVisitor(EntrySetCommand.java:42)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)
	at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:112)
	at org.infinispan.commands.AbstractVisitor.visitEntrySetCommand(AbstractVisitor.java:89)
	at org.infinispan.commands.read.EntrySetCommand.acceptVisitor(EntrySetCommand.java:42)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)
	at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:112)
	at org.infinispan.commands.AbstractVisitor.visitEntrySetCommand(AbstractVisitor.java:89)
	at org.infinispan.commands.read.EntrySetCommand.acceptVisitor(EntrySetCommand.java:42)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)
	at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:112)
	at org.infinispan.commands.AbstractVisitor.visitEntrySetCommand(AbstractVisitor.java:89)
	at org.infinispan.commands.read.EntrySetCommand.acceptVisitor(EntrySetCommand.java:42)
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)
	at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:106)
	at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:70)
	at org.infinispan.commands.AbstractVisitor.visitEntrySetCommand(AbstractVisitor.java:89)
	at org.infinispan.commands.read.EntrySetCommand.acceptVisitor(EntrySetCommand.java:42)
	at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:321)
	at org.infinispan.CacheImpl.entrySet(CacheImpl.java:473)
	at org.infinispan.CacheImpl.entrySet(CacheImpl.java:466)
	at org.infinispan.expiry.ExpiryTest.doTestEntrySetAfterExpiryInPut(ExpiryTest.java:281)
	at org.infinispan.expiry.ExpiryTest.testEntrySetAfterExpiryWithStore(ExpiryTest.java:251)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
	at org.testng.TestRunner.privateRun(TestRunner.java:767)
	at org.testng.TestRunner.run(TestRunner.java:617)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
	at org.testng.SuiteRunner.access$000(SuiteRunner.java:37)
	at org.testng.SuiteRunner$SuiteWorker.run(SuiteRunner.java:368)
	at org.testng.internal.thread.ThreadUtil$2.call(ThreadUtil.java:64)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
	at org.infinispan.interceptors.CacheLoaderInterceptor$2.processEntry(CacheLoaderInterceptor.java:192)
	at org.infinispan.persistence.file.SingleFileStore$1.call(SingleFileStore.java:438)
	at org.infinispan.persistence.file.SingleFileStore$1.call(SingleFileStore.java:434)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at org.infinispan.util.concurrent.WithinThreadExecutor.execute(WithinThreadExecutor.java:22)
	at java.util.concurrent.ExecutorCompletionService.submit(ExecutorCompletionService.java:181)
	at org.infinispan.persistence.file.SingleFileStore.process(SingleFileStore.java:434)
	... 50 more