[jboss-jira] [JBoss JIRA] (JBRULES-3269) Drools NPE on SlidingTimeWindowComparator

[Edson Tirelli (Commented) (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-3269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12638172#comment-12638172 ] 

Edson Tirelli commented on JBRULES-3269:
----------------------------------------

Diego, can you please provide an explanation of how to reproduce this problem? Which code are you running?
                
> Drools NPE on SlidingTimeWindowComparator
> -----------------------------------------
>
>                 Key: JBRULES-3269
>                 URL: https://issues.jboss.org/browse/JBRULES-3269
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.3.0.Final
>            Reporter: Diego Naya
>            Assignee: Mark Proctor
>
> Exception in thread "Thread-0" org.drools.RuntimeDroolsException: Unexpected exception executing action org.drools.rule.SlidingTimeWindow$BehaviorExpireWMAction at 1737712
> 	at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:973)
> 	at org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1231)
> 	at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:753)
> 	at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:729)
> 	at org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(StatefulKnowledgeSessionImpl.java:234)
> 	at com.sample.DroolsTest$1.run(DroolsTest.java:35)
> Caused by: java.lang.NullPointerException
> 	at org.drools.rule.SlidingTimeWindow$SlidingTimeWindowComparator.compare(SlidingTimeWindow.java:232)
> 	at org.drools.rule.SlidingTimeWindow$SlidingTimeWindowComparator.compare(SlidingTimeWindow.java:227)
> 	at java.util.PriorityQueue.siftDownUsingComparator(PriorityQueue.java:661)
> 	at java.util.PriorityQueue.siftDown(PriorityQueue.java:629)
> 	at java.util.PriorityQueue.poll(PriorityQueue.java:540)
> 	at java.util.AbstractQueue.remove(AbstractQueue.java:114)
> 	at org.drools.rule.SlidingTimeWindow.expireTuples(SlidingTimeWindow.java:164)
> 	at org.drools.rule.SlidingTimeWindow$BehaviorExpireWMAction.execute(SlidingTimeWindow.java:431)
> 	at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:971)
> 	... 5 more

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