[rules-users] Getting an Error While Executing Rule in Drools 5.0

[Nikhil S. Kulkarni]

Hi,

                I have compiled some rules and added it in packages. Then I serialized those packages and stored in database in the form of CLOB data
Now  I am able to get Packages back from database and loaded it in RuleBase.
But while executing Rule, I am getting the following Exception.

java.lang.NullPointerException
                at org.drools.base.ClassFieldReader.getValue(ClassFieldReader.java:91)
                at org.drools.base.evaluators.EqualityEvaluatorsDefinition$StringEqualEvaluator.evaluate(EqualityEvaluatorsDefinition.java:1962)
                at org.drools.rule.LiteralRestriction.isAllowed(LiteralRestriction.java:92)
                at org.drools.rule.OrCompositeRestriction.isAllowed(OrCompositeRestriction.java:25)
                at org.drools.rule.MultiRestrictionFieldConstraint.isAllowed(MultiRestrictionFieldConstraint.java:97)
                at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:143)
                at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:360)
                at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:344)
                at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:185)
                at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:146)
                at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1046)
                at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1001)
                at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:788)
                at org.drools.reteoo.ReteooStatelessSession.execute(ReteooStatelessSession.java:201)

                The similar kind of issue is already logged by someone.

Please inform If anyone has an idea about this.
Waiting for Reply.

Thanks & Regards,
Nikhil S. Kulkarni

MASTEK LTD.
Mastek is in NASSCOM's 'India Top 20' Software Service Exporters List.
In the US, we're called MAJESCOMASTEK

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