I'm probably not the one to answer your question; but could you please explain a little more how you are using drools?<div><br></div><div>I believe partitioning is related to drools-fusion's capabilities rather than a generic multi-threading facility.</div>
<div><br></div><div>I also believe it needs to be used in conjunction with entry-points.</div><div><br></div><div>A little more information would benefit others' replies.</div><div><br></div><div>Thanks,</div><div><br>
</div><div>Mike</div><div><br><div class="gmail_quote">On 20 October 2010 11:53, Tim 4076 <span dir="ltr"><<a href="mailto:tm4076@gmail.com">tm4076@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
I am attempting to use the multi thread knowledgebase partitioning<br>
feature on drools 5.1, but am not having much luck. Using a stateless<br>
session with MultithreadEvaluationOption.YES and<br>
MaxThreadsOption.get(2) always gives a NullPointer exception:<br>
<br>
java.lang.NullPointerException<br>
at org.drools.reteoo.PartitionManager.waitForPendingTasks(PartitionManager.java:105)<br>
at org.drools.common.AbstractWorkingMemory.prepareToFireActivation(AbstractWorkingMemory.java:2090)<br>
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:845)<br>
at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1071)<br>
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:785)<br>
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:751)<br>
at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218)<br>
at org.drools.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:302)<br>
at com.sample.DroolsTest.main(DroolsTest.java:70)<br>
<br>
This looks similar to JIRA 2125, which was raised over a year ago.<br>
Does this mean that this feature is completely non-functional?<br>
<br>
<br>
Thanks,<br>
Tim<br>
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</blockquote></div><br></div>