[rules-users] Facing Problem with this exception

[Davide Sottara]

Similar bugs have been fixed over different versions, but
it's very difficult to tell without some context.
One would need at least the rule that causes the exception,
but a minimal reproducer (rules + facts) would be ideal.

On 03/05/2014 11:12 AM, Wolfgang Laun wrote:
> Could be a bug that has been fixed in some later version - can someone
> confirm this please?
>
> OP is using drools 5.1.1, and should try 5.6.
>
> -W
>
> On 05/03/2014, Mallikarjun Kohalli (mkohalli) <mkohalli at cisco.com> wrote:
>> Hi All,
>> We are getting the following exceptions when drools is executing some
>> rules.
>>
>> Exception:
>>
>> Caused by: java.lang.NullPointerException
>>         at
>> org.drools.core.util.LeftTupleIndexHashTable.remove(LeftTupleIndexHashTable.java:251)
>>         at org.drools.reteoo.NotNode.retractLeftTuple(NotNode.java:226)
>>         at
>> org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:217)
>>         at
>> org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateRetractRightTuple(SingleLeftTupleSinkAdapter.java:124)
>>         at org.drools.reteoo.JoinNode.retractRightTuple(JoinNode.java:151)
>>         at
>> org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:232)
>>         at
>> org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteExpireAction.execute(ReteooWorkingMemory.java:412)
>>         at
>> org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1471)
>>         ... 51 more
>>
>>
>>
>> Regards,
>> Mallikarjun K
>>
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