Hello Guys,
I'm having a NPE in the ClassFieldExtractor.getValue(InternalWorkingMemory,
Object) line: 127
It happens while executing the RHS of a rule that modifies one fact and then
updates one and retract another.
rule "foo"
when
...
then
// apply changes
PolicyHelper.makeInPolicy($room, $pRoom.getCompliantRuleId(),
$pRoom.getPrefLevel(), ProfileTypeEnum.COMPANY);
update($room);
retract($pRoom);
end
--
We're using good old 4.0.7, with ShadowFacts :(
I tracked down the problem to
FactHandleIndexHashTable$FieldIndexEntry.matches(ReteTuple, int) line:
> 385
>
Where,
this.first.getFactHandle()
>
Returns an invalidated fact handle (a handle of a fact that has been
retracted before, I imagine). The NPE happens because invalidated handles
have their "object" attribute
set to "null" and the matches method mentioned above does:
public boolean matches(final ReteTuple tuple,
> final int tupleHashCode) {
> return this.hashCode == tupleHashCode && this.index.equal( *
> this.first.getFactHandle().getObject()*,
>
> tuple );
>
Is there something I could do to workaround this problem? Any clue is
welcome.
Thanks,
Leo.
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