When a transaction is committed at the same instance as a resource adapter/remote EJB calls XAT::recover() then you can get an NPE ---------------------------------------------------------------------------------------------------------------------------------- Key: JBTM-2703 URL: https://issues.jboss.org/browse/JBTM-2703 Project: JBoss Transaction Manager Issue Type: Bug Components: JCA Reporter: Tom Jenkinson Assignee: Tom Jenkinson Fix For: 5.next {code} INFO [com.arjuna.ats.arjuna] ObjectStore record was deleted during restoration, users should not deleted records manually: <SNIP>/ShadowNoFileLockStore/defaultStore/StateManager/BasicAction/TwoPhaseCoordinator/AtomicAction/SubordinateAtomicAction/JCA<SNIP>: java.io.FileNotFoundException: <SNIP>/ShadowNoFileLockStore/defaultStore/StateManager/BasicAction/TwoPhaseCoordinator/AtomicAction/SubordinateAtomicAction/JCA/<SNIP> (No such file or directory) ERROR [stderr] java.io.IOException: java.lang.NullPointerException ERROR [stderr] at com.arjuna.ats.arjuna.StateManager.unpackHeader(StateManager.java:732) ERROR [stderr] at com.arjuna.ats.internal.jta.transaction.arjunacore.subordinate.jca.SubordinateAtomicAction.<init>(SubordinateAtomicAction.java:82) ERROR [stderr] at com.arjuna.ats.internal.jta.transaction.arjunacore.jca.XATerminatorImple.doRecover(XATerminatorImple.java:393) ERROR [stderr] at org.jboss.as.ejb3.remote.EJBRemoteTransactionsRepository.getXidsToRecoverForParentNode(EJBRemoteTransactionsRepository.java:178) ERROR [stderr] at org.jboss.as.ejb3.remote.protocol.versiontwo.TransactionRecoverMessageHandler$TxRecoveryTask.run(TransactionRecoverMessageHandler.java:96) ERROR [stderr] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) ERROR [stderr] at java.util.concurrent.FutureTask.run(FutureTask.java:262) ERROR [stderr] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) ERROR [stderr] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) ERROR [stderr] at java.lang.Thread.run(Thread.java:745) ERROR [stderr] at org.jboss.threads.JBossThread.run(JBossThread.java:122) ERROR [stderr] Caused by: java.lang.NullPointerException ERROR [stderr] at com.arjuna.ats.arjuna.StateManager.unpackHeader(StateManager.java:697) ERROR [stderr] ... 10 more {code}