Hello,
I'm able to reproduce this issue with a KB containing only 1
rule.
rule "Qualification##ToControl"
salience
50
when
$p:
AccessRegisterSnapshot(
$effDt:
effectivedate )
$dpo:
DeliveryPoint()
$gCfg:
GeneralConfig(
(
todate == null ||
( todate after[ 0d
] $effDt &&
todate after[ 1ms
] fromdate ) ) )
from
$dpo.generalConfigs
then
end
This rule worked under drools 5.5.0.Final.
Caused by: java.lang.NullPointerException at
org.drools.base.evaluators.AfterEvaluatorDefinition$AfterEvaluator.evaluate(AfterEvaluatorDefinition.java:347)
at
org.drools.base.EvaluatorWrapper.evaluate(EvaluatorWrapper.java:99)
Davide Sottara wrote
I tried to reproduce the problem,
with no success.
Could you please create a self-contained unit test?
If confirmed, I'll fix the problem as soon as possible
Thanks
Davide
On 11/14/2013 04:48 AM, abr wrote:
Hi everyone,
I tried to switch from 5.5.0.Final to 5.6.0.CR1 and got
a null pointer
exception in the evaluation of the after evaluator.
(Exact method is:
/org.drools.base.evaluators.AfterEvaluatorDefinition.AfterEvaluator.evaluate(InternalWorkingMemory,
InternalReadAccessor, InternalFactHandle,
InternalReadAccessor,
InternalFactHandle)/ )
When debugging, the exception occurs at the very first
line of the
method,
in:
/ if ( extractor1.isNullValue( workingMemory,
handle1.getObject() ) ||
extractor2.isNullValue( workingMemory,
handle2.getObject() )
) {
return false;
}
/
The cause of the exception is that handle1 is null.
The rule where the exception occurs looks like:
/ MyFact(
fromdate before[ 0d ] $min,
( todate == null || todate after[ 0d ] $max ) )
/
When the exception occurs, /MyFact.fromdate/ is not
null, /$min/ is not
null, /MyFact.todate/ is null, /$max/ is not null.
In AfterEvaluator.evaluate : /extractor1/ refers to
/MyFact.todate/,
/extractor2/ refers to /$max/, /handle1/ is null,
/handle2/ refers to the
fact including the attribute to which /$max/ variable is
bound to.
Of course, this worked fine in 5.5.0.Final.
I couldn't test this out in Drools 6.0.0.CR5 because I
have dependencies
to
drools-spring JAR that does not exist anymore in
6.0.0.CR5.
Is it simple to fix this problem?
Thanks in advance.
Best,
Alexis
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