[ http://jira.codehaus.org/browse/DROOLS-462?page=all ]
Michael Neale closed DROOLS-462:
--------------------------------
Resolution: Cannot Reproduce
No one has been able to reproduce it.
May come back from the dead one day, but most likely the exceptions are not to
do with drools (NullPointers rarely are).
Some perhipheral improvements for 2.5 may have also prevented this from
recurring.
> NullPointerException in PrimitiveLongMap
> ----------------------------------------
>
> Key: DROOLS-462
> URL: http://jira.codehaus.org/browse/DROOLS-462
> Project: drools
> Type: Bug
> Components: reteoo
> Versions: 2.0-rc-2, 2.0-rc-1, 2.0-final, 2.1
> Environment: Linux playnow02 2.4.21-27.0.2.ELhugemem #1 SMP Wed Jan 12
> 23:24:48 EST 2005 i686 i686 i386 GNU/Linux
> java version "1.5.0_02"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_02-b09)
> Java HotSpot(TM) Server VM (build 1.5.0_02-b09, mixed mode)
> Reporter: Philip Smith
> Assignee: bob mcwhirter
>
>
> NullPointerException
> 11/30/05 23:22:27:262: [Thread-17]: java.lang.NullPointerException
> at
> org.drools.util.PrimitiveLongMap.findPage(PrimitiveLongMap.java:301)
> at org.drools.util.PrimitiveLongMap.remove(PrimitiveLongMap.java:158)
> at
> org.drools.reteoo.WorkingMemoryImpl.removeObject(WorkingMemoryImpl.java:483)
> at
> org.drools.reteoo.WorkingMemoryImpl.modifyObject(WorkingMemoryImpl.java:519)
> at
> org.drools.spi.DefaultKnowledgeHelper.modifyObject(DefaultKnowledgeHelper.java:77)
> at Consequence_3.invoke(Consequence_3.java:8)
> at
> org.drools.semantics.java.JavaBlockConsequence.invoke(JavaBlockConsequence.java:130)
> at org.drools.reteoo.AgendaItem.fire(AgendaItem.java:170)
> at org.drools.reteoo.Agenda.fireNextItem(Agenda.java:387)
> at
> org.drools.reteoo.WorkingMemoryImpl.fireAllRules(WorkingMemoryImpl.java:255)
> at
> org.drools.reteoo.WorkingMemoryImpl.fireAllRules(WorkingMemoryImpl.java:270)
> at
> com.pogo.serv.playnow.drools.SynchronizedWorkingMemory.fireAllRules(SynchronizedWorkingMemory.java:58)
> at
> com.pogo.serv.playnow.drools.DroolsWorkingMemory$4.run(DroolsWorkingMemory.java:176)
> at
> com.pogo.serv.playnow.drools.DroolsWorkingMemory$Task.run(DroolsWorkingMemory.java:270)
> at
> EDU.oswego.cs.dl.util.concurrent.QueuedExecutor$RunLoop.run(Unknown Source)
> at java.lang.Thread.run(Thread.java:595)
> The drools version used is 2.0-rc-1 but the code is stil the same in 2.1.
> After this NPE there were other NPEs thrown and the system and working memory
> instance became unusable. This is not readily reproducable and occurred after
> the working memory instance had been in continual use for 36 hours. The
> working memory had recently contained about 8500 facts. This system has been
> running continuously since 10/25 and a similar incident may have occurred
> once before. Lately this function has experienced moderately increased load.
> There have been other NPE bugs filed against the PrimitiveLongMap and I
> wonder if this is another case.
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