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

[miguel machado]

@puneet it may be a good ideia memory wise. I'm doing it right now, in order
to compile rules just once.

_ miguel


2010/5/5 Puneet duggal <duggalpunit at gmail.com>

> @ Nikhil,
>
> I am not sure weather it a good practice to seralize a package and store it
> , i am new to it and  i am storing the drl  files in db .
> Can we retrive our DRL file after retriving the packge from database.??
>
>
> On 5/4/10, Nikhil S. Kulkarni <Nikhil.Kulkarni at mastek.com> wrote:
>
>>  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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