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