Hi,
I have been trying with jboss-cache head version and this bug hasn't been fixed yet, like you said in another post. I am using Jboss 4.0.1 in a windows system.

In 1.2 version the problem appears everytime you get a node without put anyone. In the head version, the problem appears the first time you get a node, after the first time there is no exception, and nothing happens if you put a node after the get.

What's happend with that???

This is the exception:

10:55:09,281 ERROR [CacheStoreInterceptor] failed committing transaction to cache loader
java.lang.Exception: entry for transaction <null>:2 not found in transaction table
 at org.jboss.cache.interceptors.CacheStoreInterceptor$SynchronizationHandler.afterCompletion(CacheStoreInterceptor.java:254)
 at org.jboss.tm.TransactionImpl.doAfterCompletion(TransactionImpl.java:1418)
 at org.jboss.tm.TransactionImpl.completeTransaction(TransactionImpl.java:1090)
 at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:349)
 at org.jboss.ejb.plugins.TxInterceptorCMT.endTransaction(TxInterceptorCMT.java:454)
 at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:322)
 at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:146)
 at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:123)
 at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:192)
 at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122)
 at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:624)
 at org.jboss.ejb.Container.invoke(Container.java:870)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:324)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:144)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
 at org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke(JRMPInvoker.java:805)
 at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:406)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:324)
 at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
 at sun.rmi.transport.Transport$1.run(Transport.java:148)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
 at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
 at java.lang.Thread.run(Thread.java:534)