[rules-users] Help with troubleshooting rules/Drools

[Robert Crawford]

I knew I spoke too soon. Now, from 5.2:


12:49:52,625 ERROR [STDERR] org.drools.RuntimeDroolsException: Unexpected
exception executing action
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteExpireAction at 554af19c
12:49:52,625 ERROR [STDERR]     at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:996)
12:49:52,625 ERROR [STDERR]     at
org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1037)
12:49:52,625 ERROR [STDERR]     at
org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:777)
12:49:52,625 ERROR [STDERR]     at
org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:753)
12:49:52,625 ERROR [STDERR]     at
org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(StatefulKnowledgeSessionImpl.java:234)
12:49:52,625 ERROR [STDERR]     at
com.kroger.tempmonitor.app.service.RuleService$1.run(RuleService.java:214)
12:49:52,625 ERROR [STDERR]     at java.lang.Thread.run(Thread.java:662)
12:49:52,625 ERROR [STDERR] Caused by: java.lang.NullPointerException
12:49:52,625 ERROR [STDERR]     at
org.drools.reteoo.AccumulateNode.removeMatch(AccumulateNode.java:838)
12:49:52,626 ERROR [STDERR]     at
org.drools.reteoo.AccumulateNode.removePreviousMatchesForRightTuple(AccumulateNode.java:908)
12:49:52,626 ERROR [STDERR]     at
org.drools.reteoo.AccumulateNode.retractRightTuple(AccumulateNode.java:308)
12:49:52,626 ERROR [STDERR]     at
org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:235)
12:49:52,626 ERROR [STDERR]     at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteExpireAction.execute(ReteooWorkingMemory.java:464)
12:49:52,626 ERROR [STDERR]     at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:994)
12:49:52,626 ERROR [STDERR]     ... 6 more

I have a couple custom accumulate functions; I think the solution here may
just be to have them return false for supportsReverse().



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