I have a JBC 3 cache instance configured to use a JTA transactionManager. Assuming that I have configured the cache instance properly, is it possible for a MVCCInvocationContext NOT to have reference to MVCCTransactionContext while thread of execution is inside MVCCInvocationContext.lookUpNode(fqn)? Specifically, a thread is inside MVCCInvocationContext.lookUpNode(fqn) and mvccTx is (sometimes) null. See sample call stack below. If this is NOT a valid state, does that mean that JBC isn't "seeing" my JTA txManager - ie I have a config problem? If it is a valid state, please explain why so. Here's a call stack: anonymous wrote : | org.jboss.cache.invocation.MVCCInvocationContext.lookUpNode(MVCCInvocationContext.java:64) | org.jboss.cache.commands.write.PutKeyValueCommand.perform(PutKeyValueCommand.java:78) | org.jboss.cache.interceptors.CallInterceptor.invokeCommand(CallInterceptor.java:108) | org.jboss.cache.interceptors.CallInterceptor.handleAlterCacheMethod(CallInterceptor.java:173) | org.jboss.cache.interceptors.CallInterceptor.visitPutForExternalReadCommand(CallInterceptor.java:137) | org.jboss.cache.commands.write.PutForExternalReadCommand.acceptVisitor(PutForExternalReadCommand.java:72) | org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) | org.jboss.cache.interceptors.MVCCLockingInterceptor.handlePutForExternalReadCommand(MVCCLockingInterceptor.java:110) | org.jboss.cache.interceptors.base.PrePostProcessingCommandInterceptor.visitPutForExternalReadCommand(PrePostProcessingCommandInterceptor.java:101) | org.jboss.cache.commands.write.PutForExternalReadCommand.acceptVisitor(PutForExternalReadCommand.java:72) | org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) | org.jboss.cache.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:131) | org.jboss.cache.commands.AbstractVisitor.visitPutForExternalReadCommand(AbstractVisitor.java:70) | org.jboss.cache.commands.write.PutForExternalReadCommand.acceptVisitor(PutForExternalReadCommand.java:72) | org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) | org.jboss.cache.interceptors.TxInterceptor.attachGtxAndPassUpChain(TxInterceptor.java:261) | org.jboss.cache.interceptors.TxInterceptor.handleDefault(TxInterceptor.java:250) | org.jboss.cache.commands.AbstractVisitor.visitPutForExternalReadCommand(AbstractVisitor.java:70) | org.jboss.cache.commands.write.PutForExternalReadCommand.acceptVisitor(PutForExternalReadCommand.java:72) | org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) | org.jboss.cache.interceptors.CacheMgmtInterceptor.visitPutKeyValueCommand(CacheMgmtInterceptor.java:108) | org.jboss.cache.interceptors.CacheMgmtInterceptor.visitPutForExternalReadCommand(CacheMgmtInterceptor.java:102) | org.jboss.cache.commands.write.PutForExternalReadCommand.acceptVisitor(PutForExternalReadCommand.java:72) | org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) | org.jboss.cache.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:178) | org.jboss.cache.interceptors.InvocationContextInterceptor.visitPutForExternalReadCommand(InvocationContextInterceptor.java:76) | org.jboss.cache.commands.write.PutForExternalReadCommand.acceptVisitor(PutForExternalReadCommand.java:72) | org.jboss.cache.interceptors.InterceptorChain.invoke(InterceptorChain.java:287) | org.jboss.cache.invocation.CacheInvocationDelegate.putForExternalRead(CacheInvocationDelegate.java:459) | org.hibernate.cache.jbc2.util.CacheHelper.putForExternalRead(CacheHelper.java:295) | org.hibernate.cache.jbc2.util.CacheHelper.putForExternalRead(CacheHelper.java:268) | org.hibernate.cache.jbc2.access.TransactionalAccessDelegate.putFromLoad(TransactionalAccessDelegate.java:80) | org.hibernate.cache.jbc2.collection.TransactionalAccess.putFromLoad(TransactionalAccess.java:98) | org.hibernate.engine.loading.CollectionLoadContext.addCollectionToCache(CollectionLoadContext.java:333) | org.hibernate.engine.loading.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:279) | org.hibernate.engine.loading.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:245) | org.hibernate.engine.loading.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:218) | org.hibernate.loader.Loader.endCollectionLoad(Loader.java:900) | org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:888) | org.hibernate.loader.Loader.doQuery(Loader.java:752) | org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) | org.hibernate.loader.Loader.loadCollection(Loader.java:2015) | org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:59) | org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:587) | org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83) | org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1743) | org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366) | org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108) | org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:131) | org.hibernate.collection.PersistentSet.isEmpty(PersistentSet.java:169) | com.doppelganger.domain.User.getCurrentUserSession(User.java:306) | com.doppelganger.framework.cache.LocalCacheTest$1.doInTransactionWithException(LocalCacheTest.java:62) | com.doppelganger.test.service.impl.DgTxAnnotationDependingTemplate.executeWithException(DgTxAnnotationDependingTemplate.java:22) | sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java) | sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | java.lang.reflect.Method.invoke(Method.java:597) | org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307) | org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182) | org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149) | org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106) | org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) | org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:77) | com.doppelganger.service.tx.TxRetryAspect.doRetryIfNeeded(TxRetryAspect.java:114) | com.doppelganger.service.tx.TxRetryAspect.retryIfNeededForTxAnnotation(TxRetryAspect.java:90) | sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java) | sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | java.lang.reflect.Method.invoke(Method.java:597) | org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:627) | org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:616) | org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:64) | org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:160) | org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89) | org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) | org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) | $Proxy182.executeWithException | com.doppelganger.framework.cache.LocalCacheTest.testPutForExternalPutRemoveInTx1_readInTx2(LocalCacheTest.java:56) | sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java) | sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | java.lang.reflect.Method.invoke(Method.java:597) | junit.framework.TestCase.runTest(TestCase.java:168) | junit.framework.TestCase.runBare(TestCase.java:134) | org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:76) | junit.framework.TestResult$1.protect(TestResult.java:110) | thanks -nikita View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4215969#... 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