[hibernate-issues] [Hibernate-JIRA] Created: (HSEARCH-1087) Synchronization during JTA afterCompletion() incompatible with Hibernate-Core

[Eli Colner (JIRA)]

Synchronization during JTA afterCompletion() incompatible with Hibernate-Core
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                 Key: HSEARCH-1087
                 URL: https://hibernate.onjira.com/browse/HSEARCH-1087
             Project: Hibernate Search
          Issue Type: Bug
          Components: engine
    Affects Versions: 4.0.0.Final
            Reporter: Eli Colner
            Priority: Critical


During synchronization Hibernate Core's SessionImpl.close() calls org.hibernate.engine.transaction.internal.TransactionCoordinator.close() which in-turns calls org.hibernate.engine.transaction.internal.TransactionCoordinator.reset().  During the reset the transactionCoordinator calls org.hibernate.engine.transaction.internal.SynchronizationRegistry.clearSynchronizations().  The synchronizations list is emptied and nulled.  This removes the BeforeCommitSynchronizationDelegator instance that was registered from org.hibernate.search.backend.impl.EventSourceTransactionContext.registerSynchronization() during the JTA transaction.  Clearing the synchronization list causes a ConcurrentModificationException to be thrown from org.hibernate.search.backend.impl.SynchronizationRegistryImpl.notifySynchronizationsAfterTransactionCompletion() because it is iterating the synchronization list and at the start it contains two Synchronization instances in this order (EntityManagerImpl.Synchronization, BeforeCommitSynchronizationDelegator).  So, basically the first Synchronization is removing the second Synchronization while in a loop...


ARJUNA016029: SynchronizationImple.afterCompletion - failed for org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization at 192e31c with exception
java.util.ConcurrentModificationException
	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
	at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:384)
	at org.hibernate.engine.transaction.internal.SynchronizationRegistryImpl.notifySynchronizationsAfterTransactionCompletion(SynchronizationRegistryImpl.java:78)
	at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.sendAfterTransactionCompletionNotifications(TransactionCoordinatorImpl.java:335)
	at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.afterTransaction(TransactionCoordinatorImpl.java:147)
	at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.afterCompletion(SynchronizationCallbackCoordinatorImpl.java:126)
	at org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization.afterCompletion(RegisteredSynchronization.java:61)
	at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.afterCompletion(SynchronizationImple.java:117)
	at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.afterCompletion(TwoPhaseCoordinator.java:403)
	at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:104)
	at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:159)
	at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1162)
	at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:119)
	at org.springframework.transaction.jta.JtaTransactionManager.doCommit(JtaTransactionManager.java:1010)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)

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