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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