[jboss-jira] [JBoss JIRA] (DROOLS-264) JPAKnowledgeService stops to work suddenly

[Nedo Nedic (JIRA)]

Nedo Nedic created DROOLS-264:
---------------------------------

             Summary: JPAKnowledgeService stops to work suddenly
                 Key: DROOLS-264
                 URL: https://issues.jboss.org/browse/DROOLS-264
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 5.5.0.Final
         Environment: PostgreSQL 8.4
Linux Ubuntu
JBoss 5.1.0
            Reporter: Nedo Nedic
            Assignee: Mark Proctor


>From time to time, while facts are being inserted into session and persisted in database, the following exception occurs.
The session is no more updated because SQL sentences can't be executed anymore. Sometimes, when session is restored from marshalled snapshot the same error happens.

2013-09-17 11:17:03,959 ERROR [org.drools.persistence.jpa.JpaTimerJobInstance] Unable to execute timer job!
java.lang.RuntimeException: Unable to load session snapshot
	at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:96)
	at org.drools.persistence.SingleSessionCommandService.initKsession(SingleSessionCommandService.java:269)
	at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:369)
	at org.drools.persistence.jpa.JpaTimerJobInstance.call(JpaTimerJobInstance.java:34)
	at org.drools.time.impl.DefaultTimerJobInstance.call(DefaultTimerJobInstance.java:1)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:207)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
	at org.drools.time.impl.JDKTimerService.removeJob(JDKTimerService.java:133)
	at org.drools.common.Scheduler.removeAgendaItem(Scheduler.java:75)
	at org.drools.common.DefaultAgenda.removeScheduleItem(DefaultAgenda.java:474)
	at org.drools.common.DefaultAgenda.removeActivation(DefaultAgenda.java:349)
	at org.drools.common.DefaultAgenda.cancelActivation(DefaultAgenda.java:687)
	at org.drools.reteoo.RuleTerminalNode.retractLeftTuple(RuleTerminalNode.java:320)
	at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:224)
	at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:98)
	at org.drools.reteoo.NotNode.propagateRetractLeftTuple(NotNode.java:444)
	at org.drools.reteoo.NotNode.assertObject(NotNode.java:142)
	at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
	at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:364)
	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
	at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
	at org.drools.marshalling.impl.ProtobufInputMarshaller.assertHandleIntoOTN(ProtobufInputMarshaller.java:483)
	at org.drools.marshalling.impl.ProtobufInputMarshaller.readFactHandles(ProtobufInputMarshaller.java:459)
	at org.drools.marshalling.impl.ProtobufInputMarshaller.readSession(ProtobufInputMarshaller.java:259)
	at org.drools.marshalling.impl.ProtobufInputMarshaller.readSession(ProtobufInputMarshaller.java:116)
	at org.drools.marshalling.impl.ProtobufMarshaller.unmarshall(ProtobufMarshaller.java:143)
	at org.drools.persistence.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:88)
	... 11 more




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