REST MOP Import doesn't detect errors on commit in JBoss Portal

Issue

• When I invoked REST MOP Import, I got 200 response but the portal didn't have imported pages. I see following messages in server.log.

2013-08-20 07:56:33,552 INFO  [org.exoplatform.portal.mop.management.operations.MopImportResource] (ajp-10.236.15.129-8009-6) Import successful !
...
2013-08-20 07:56:49,804 WARN  [org.jboss.cache.interceptors.TxInterceptor] (ajp-10.236.15.129-8009-6) Caught exception, will now set transaction to roll back
org.jboss.cache.ReplicationException: rsp=sender=10.237.250.128:56200, retval=null, received=false, suspected=false
        at org.jboss.cache.RPCManagerImpl.callRemoteMethods(RPCManagerImpl.java:766)
        at org.jboss.cache.RPCManagerImpl.callRemoteMethods(RPCManagerImpl.java:712)
        at org.jboss.cache.RPCManagerImpl.callRemoteMethods(RPCManagerImpl.java:717)
        at org.jboss.cache.interceptors.BaseRpcInterceptor.replicateCall(BaseRpcInterceptor.java:161)
        at org.jboss.cache.interceptors.BaseRpcInterceptor.replicateCall(BaseRpcInterceptor.java:135)
        at org.jboss.cache.interceptors.BaseRpcInterceptor.replicateCall(BaseRpcInterceptor.java:107)
        at org.jboss.cache.interceptors.ReplicationInterceptor.runPreparePhase(ReplicationInterceptor.java:192)
        at org.jboss.cache.interceptors.ReplicationInterceptor.visitPrepareCommand(ReplicationInterceptor.java:72)
        at org.jboss.cache.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:68)
        at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
        at org.jboss.cache.interceptors.NotificationInterceptor.visitPrepareCommand(NotificationInterceptor.java:50)
        at org.jboss.cache.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:68)
        at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
        at org.jboss.cache.interceptors.TxInterceptor.runPreparePhase(TxInterceptor.java:682)
        at org.jboss.cache.interceptors.TxInterceptor$LocalSynchronizationHandler.beforeCompletion(TxInterceptor.java:1102)
        at org.jboss.cache.interceptors.OrderedSynchronizationHandler.beforeCompletion(OrderedSynchronizationHandler.java:81)
        at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:101)
        at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:272)
        at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:89)
        at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:160)
        at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1433)
        at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:137)
        at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75)
        at org.exoplatform.services.transaction.impl.AbstractTransactionService$TransactionManagerTxTimeoutAware.commit(AbstractTransactionService.java:326)
        at org.exoplatform.services.jcr.impl.dataflow.persistent.CacheableWorkspaceDataManager.doCommit(CacheableWorkspaceDataManager.java:1044)
...
Caused by: org.jboss.cache.lock.TimeoutException: Replication timeout for 10.237.250.128:56200
        at org.jboss.cache.RPCManagerImpl.callRemoteMethods(RPCManagerImpl.java:764)
        ... 85 more