Does anyone know what this would be indicative of? I've seen it occur
periodically at which point I have to discard the session. I flatten and
assert my data, run the rules, and then retract the handles collected on
assertion. I've ensured the fact handle parameter is never null. I have the
stateful session wrapped in a synchronized business façade, so I don't think it
should be a concurrency issue (unless I have a bug of course). I'm running
Drools 5 M4.
java.lang.NullPointerException
at
org.drools.util.RightTupleIndexHashTable.remove(RightTupleIndexHashTable.java:224)
at org.drools.reteoo.JoinNode.retractRightTuple(JoinNode.java:204)
at
org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:210)
at
org.drools.reteoo.EntryPointNode.retractObject(EntryPointNode.java:190)
at
org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:1078)
at
org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:1045)
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