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

[Puneet duggal]

ohk compiling the rule and storing it
its really a good  for memory


On 5/5/10, miguel machado <mls.machado at gmail.com> wrote:
>
> @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
>>>
>>>
>>>
>>>
>>>
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>>
>>
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