<br> You must update to <a href="http://4.0.7.">4.0.7.</a> You are probably facing the issues we had in <a href="http://4.0.3.">4.0.3.</a><br><br> []s<br> Edson<br><br><div class="gmail_quote">2008/5/7 Barath <<a href="mailto:barathguna@gmail.com">barathguna@gmail.com</a>>:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Edson,<br>
I am using 4.0.3 version.<br>
<br>
In my code,<br>
* For each thread new rule base and StatefulSession is created.<br>
* Then why i am getting the previously mentioned exceptions(which i posted<br>
in the first message) for few threads only while other works fine.<br>
* Your suggestions please,<br>
<div class="Ih2E3d"> " 1 . Am i getting this error bcoz of the global list? or any other<br>
reason?<br>
2 . How to solve this problem?"<br>
<br>
</div>~Barath.<br>
<div><div></div><div class="Wj3C7c"><br>
<br>
Edson Tirelli-3 wrote:<br>
><br>
> Barath,<br>
><br>
> What version of drools are you using?<br>
><br>
> The drools rulebase is designed to be shared among multiple threads.<br>
> The<br>
> working memory (session) is not.<br>
> Having said that, we had a couple bugs in the past regarding<br>
> multi-thread<br>
> environments, and so you must use 4.0.7 version that is about to be<br>
> released. For you test, while you wait for the official release, you can<br>
> checkout the code and built it from here:<br>
><br>
> <a href="http://anonsvn.labs.jboss.com/labs/jbossrules/branches/4.0.x/" target="_blank">http://anonsvn.labs.jboss.com/labs/jbossrules/branches/4.0.x/</a><br>
><br>
> []s<br>
> Edson<br>
><br>
> 2008/5/5 Barath <<a href="mailto:barathguna@gmail.com">barathguna@gmail.com</a>>:<br>
><br>
>><br>
>> Hi,<br>
>><br>
>> While doing a load test with jmeter,my web service application with<br>
>> drools<br>
>> works fine for few clients(5 simultaneous hits for 10 times)<br>
>> but when i increase my clients(120 simultanious hits for 100 times) i am<br>
>> gettin the following exception for<br>
>> few client, (out of 12,000 hits 200 throws this exception)<br>
>><br>
>> problem encountered at node [11] 5{170,189}: unable to resolve property:<br>
>> null pointer exception in property: declr.identifier<br>
>> org.mvel.TemplateInterpreter.execute(TemplateInterpreter.java:528)<br>
>> org.mvel.TemplateInterpreter.parse(TemplateInterpreter.java:341)<br>
>><br>
>> org.drools.rule.builder.dialect.java.AbstractJavaBuilder.generatTemplates(AbstractJavaBuilder.java:113)<br>
>><br>
>> org.drools.rule.builder.dialect.java.JavaConsequenceBuilder.build(JavaConsequenceBuilder.java:95)<br>
>> org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:67)<br>
>> org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:446)<br>
>> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:304)<br>
>><br>
>> org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:167)<br>
>> com.drools.util.RuleEngine.applyRule(RuleEngine.java:47)<br>
>><br>
>> com.drools.util.DroolsController.getAdvertisement(DroolsController.java:94)<br>
>><br>
>> com.drools.util.DroolsController.routeBusinessMethod(DroolsController.java:67)<br>
>><br>
>> com.drools.util.DroolsController.getAdvertisement(DroolsController.java:43)<br>
>> com.drools.MyEndpoint.getAdvertisement(MyEndpoint.java:237)<br>
>> com.drools.MyEndpoint.process(MyEndpoint.java:144)<br>
>><br>
>> org.apache.servicemix.common.AsyncBaseLifeCycle.doProcess(AsyncBaseLifeCycle.java:489)<br>
>><br>
>> org.apache.servicemix.common.AsyncBaseLifeCycle.processExchange(AsyncBaseLifeCycle.java:441)<br>
>><br>
>> org.apache.servicemix.common.BaseLifeCycle.onMessageExchange(BaseLifeCycle.java:46)<br>
>><br>
>> org.apache.servicemix.jbi.messaging.DeliveryChannelImpl.processInBound(DeliveryChannelImpl.java:595)<br>
>><br>
>> org.apache.servicemix.jbi.nmr.flow.AbstractFlow.doRouting(AbstractFlow.java:174)<br>
>><br>
>> org.apache.servicemix.jbi.nmr.flow.seda.SedaFlow.doRouting(SedaFlow.java:176)<br>
>><br>
>> org.apache.servicemix.jbi.nmr.flow.seda.SedaQueue$1.run(SedaQueue.java:134)<br>
>><br>
>> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665)<br>
>><br>
>> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690)<br>
>> java.lang.Thread.run(Thread.java:619)<br>
>><br>
>> drl file has 6 rules,<br>
>> 5 rules - which retract facts which passes the rule.<br>
>> 1 rule(low salience) - will add the fact to java.util.List (set as<br>
>> global)<br>
>> which passes the rule.<br>
>><br>
>> 1 . Am i getting this error bcoz of the global list? or any other reason?<br>
>> 2 . How to solve this problem?<br>
>><br>
>> here the rules,<br>
>><br>
>> <code><br>
>> global java.util.List feasibleAdv;<br>
>><br>
>> rule " percentage rule "<br>
>> when<br>
>> $adv : Advertisement( percentageLimit != 0 , percentageLimit <<br>
>> playedPercentage )<br>
>> then<br>
>> System.out.println("remove this adv (failed percentage):<br>
>> "+$adv.getAdvertisementID());<br>
>> retract($adv);<br>
>> end<br>
>><br>
>> rule "per day rule"<br>
>> when<br>
>> $adv : Advertisement( limitperday != 0 , limitperday <=<br>
>> playedperday<br>
>> )<br>
>> then<br>
>> //System.out.println("remove this adv (failed day):<br>
>> "+$adv.getAdvertisementID());<br>
>> retract($adv);<br>
>> end<br>
>><br>
>> rule "per week rule"<br>
>> when<br>
>> $adv : Advertisement( limitperweek != 0 , limitperweek <=<br>
>> playedperweek)<br>
>> then<br>
>> //System.out.println("remove this adv (failed week):<br>
>> "+$adv.getAdvertisementID());<br>
>> retract($adv);<br>
>> end<br>
>><br>
>> rule "per month rule"<br>
>> when<br>
>> $adv : Advertisement( limitpermonth != 0 , limitpermonth <=<br>
>> playedpermonth)<br>
>> then<br>
>> //System.out.println("remove this adv (failed month) :<br>
>> "+$adv.getAdvertisementID());<br>
>> retract($adv);<br>
>> end<br>
>><br>
>> rule "total played rule"<br>
>> when<br>
>> $adv : Advertisement( totallimit != 0 , totallimit <= totalplayed<br>
>> )<br>
>> then<br>
>> //System.out.println("remove this adv (failed total played) :<br>
>> "+$adv.getAdvertisementID());<br>
>> retract($adv);<br>
>> end<br>
>><br>
>><br>
>> rule "advertisement select rule"<br>
>> salience -1<br>
>> when<br>
>> $adv : Advertisement( $playedPercentPerAdvertisement :<br>
>> playedPercentPerAdvertisement)<br>
>> not( Advertisement( playedPercentPerAdvertisement <<br>
>> $playedPercentPerAdvertisement ) )<br>
>> $advertisementCount : Integer()<br>
>> then<br>
>> boolean status = true;<br>
>> if($advertisementCount-1 < 0){<br>
>> //System.out.println("halted");<br>
>> status = false;<br>
>> drools.halt();<br>
>> }<br>
>> if(status){<br>
>> feasibleAdv.add($adv);<br>
>> drools.update(<br>
>> drools.getWorkingMemory().getFactHandle($advertisementCount), new<br>
>> Integer($advertisementCount-1) );<br>
>> retract($adv);<br>
>> }<br>
>> end<br>
>><br>
>> </code><br>
>> --<br>
>> View this message in context:<br>
>> <a href="http://www.nabble.com/Can-drools-work-in-multithreaded-environment--tp17053936p17053936.html" target="_blank">http://www.nabble.com/Can-drools-work-in-multithreaded-environment--tp17053936p17053936.html</a><br>
>> Sent from the drools - user mailing list archive at Nabble.com.<br>
>><br>
>> _______________________________________________<br>
>> rules-users mailing list<br>
>> <a href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><br>
>> <a href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><br>
>><br>
><br>
><br>
><br>
> --<br>
> Edson Tirelli<br>
> JBoss Drools Core Development<br>
> Office: +55 11 3529-6000<br>
> Mobile: +55 11 9287-5646<br>
> JBoss, a division of Red Hat @ <a href="http://www.jboss.com" target="_blank">www.jboss.com</a><br>
><br>
> _______________________________________________<br>
> rules-users mailing list<br>
> <a href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><br>
> <a href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><br>
><br>
><br>
<br>
--<br>
</div></div>View this message in context: <a href="http://www.nabble.com/Can-i-use-drools-in-multithreaded-environment--tp17053936p17097302.html" target="_blank">http://www.nabble.com/Can-i-use-drools-in-multithreaded-environment--tp17053936p17097302.html</a><br>
<div><div></div><div class="Wj3C7c">Sent from the drools - user mailing list archive at Nabble.com.<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> Office: +55 11 3529-6000<br> Mobile: +55 11 9287-5646<br> JBoss, a division of Red Hat @ <a href="http://www.jboss.com">www.jboss.com</a>