[rules-users] Does Knowledgebase partitioning work at all?

[Tim 4076]

I'm doing some pattern analysis on large quantities of records, where
I have several hundred thousand facts and a few rules doing things
like string matching and aggregation. I have a stateless session,
which I populate with my rules and then execute against a big list of
all the facts.

The multithread options is documented in the Drools Expert user guide,
but there is no guidance on how to use it other than to set those two
options.

Cheers,
Tim


2010/10/20 Michael Anstis <michael.anstis at gmail.com>:
> I'm probably not the one to answer your question; but could you please
> explain a little more how you are using drools?
> I believe partitioning is related to drools-fusion's capabilities rather
> than a generic multi-threading facility.
> I also believe it needs to be used in conjunction with entry-points.
> A little more information would benefit others' replies.
> Thanks,
> Mike
> On 20 October 2010 11:53, Tim 4076 <tm4076 at gmail.com> wrote:
>>
>> I am attempting to use the multi thread knowledgebase partitioning
>> feature on drools 5.1, but am not having much luck. Using a stateless
>> session with MultithreadEvaluationOption.YES and
>> MaxThreadsOption.get(2) always gives a NullPointer exception:
>>
>> java.lang.NullPointerException
>>        at
>> org.drools.reteoo.PartitionManager.waitForPendingTasks(PartitionManager.java:105)
>>        at
>> org.drools.common.AbstractWorkingMemory.prepareToFireActivation(AbstractWorkingMemory.java:2090)
>>        at
>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:845)
>>        at
>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1071)
>>        at
>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:785)
>>        at
>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:751)
>>        at
>> org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218)
>>        at
>> org.drools.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:302)
>>        at com.sample.DroolsTest.main(DroolsTest.java:70)
>>
>> This looks similar to JIRA 2125, which was raised over a year ago.
>> Does this mean that this feature is completely non-functional?
>>
>>
>> Thanks,
>> Tim
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>
>
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