[jboss-jira] [JBoss JIRA] (DROOLS-404) NoClassDefFoundError happens when using "function"s in drl

[RH Bugzilla Integration (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12944477#comment-12944477 ] 

RH Bugzilla Integration commented on DROOLS-404:
------------------------------------------------

Ryan Zhang <rzhang at redhat.com> changed the Status of [bug 1060218|https://bugzilla.redhat.com/show_bug.cgi?id=1060218] from MODIFIED to ON_QA
                
> NoClassDefFoundError happens when using "function"s in drl
> ----------------------------------------------------------
>
>                 Key: DROOLS-404
>                 URL: https://issues.jboss.org/browse/DROOLS-404
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 6.0.0.Final, 6.0.1.Final
>         Environment: The base environment is the same as DefaultKieSessionExample.
> See attached maven project for details.
>            Reporter: Nandor Galambosi
>            Assignee: Mario Fusco
>             Fix For: 6.1.0.Beta1
>
>         Attachments: noclassdeffound.zip
>
>
> If I reuse a KieSession for multiple times, it seems to forget about the function defined in the DRL file.
> DRL: 
> {noformat}
> package org.drools.example.api.defaultkiesession.Hal1
> import org.drools.example.api.defaultkiesession.Message
> function boolean alwaysTrue() { 
> 	return true;
> }
> rule "rule 1" when
>     m : Message( )
> then
>     retract(m);
> end
> rule "rule 2" when
>     Message( alwaysTrue(), text == "Hello, HAL. Do you read me, HAL?" )
> then
>     insert( new Message("HAL", "Dave. I read you." ) );
> end
> {noformat}
> Java code:
> {noformat}
> package org.drools.example.api.defaultkiesession;
> import org.kie.api.KieServices;
> import org.kie.api.runtime.KieContainer;
> import org.kie.api.runtime.KieSession;
> public class DefaultKieSessionExample
> {
>     static int counter = 0;
>     public void failCase1()
>     {
>         KieServices ks = KieServices.Factory.get();
>         KieContainer kContainer = ks.getKieClasspathContainer();
>         KieSession kSession = kContainer.newKieSession();
>         for( counter = 0; counter < 10000; ++counter) {
>             kSession.insert(new Message("Dave", "Hello, HAL. Do you read me, HAL?"));
>             kSession.fireAllRules();
>             if (kSession.getFactCount() != 0) {
>                 System.err.println("error");
>             }
>         }
>     }
>     public static void main(String[] args)
>     {
>         try {
>             DefaultKieSessionExample defaultKieSessionExample = new DefaultKieSessionExample();
>             defaultKieSessionExample.failCase1();
>         } catch (NoClassDefFoundError error) {
>             System.err.println("Failed after "+counter+" testcases");
>             error.printStackTrace();
>         }
>     }
> }
> {noformat}
> Runs fine for some iterations, and after a while an exception happens:
> {noformat}
> java.lang.NoClassDefFoundError: org/drools/example/api/defaultkiesession/Hal1/AlwaysTrue
> 	at ConditionEvaluator19fe4e382c304060b0046f5cdc6a59fa.evaluate(Unknown Source)
> 	at org.drools.core.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:217)
> 	at org.drools.core.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:174)
> 	at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:134)
> 	at org.drools.core.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:502)
> 	at org.drools.core.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:387)
> 	at org.drools.core.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:288)
> 	at org.drools.core.reteoo.EntryPointNode.assertObject(EntryPointNode.java:260)
> 	at org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:360)
> 	at org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:279)
> 	at org.drools.core.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1148)
> 	at org.drools.core.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1092)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:308)
> 	at org.drools.example.api.defaultkiesession.DefaultKieSessionExample.failCase1(DefaultKieSessionExample.java:17)
> 	at org.drools.example.api.defaultkiesession.DefaultKieSessionExample.main(DefaultKieSessionExample.java:29)
> Caused by: java.lang.ClassNotFoundException: org.drools.example.api.defaultkiesession.Hal1.AlwaysTrue
> 	at org.drools.core.common.ProjectClassLoader.tryDefineType(ProjectClassLoader.java:123)
> 	at org.drools.core.common.ProjectClassLoader.loadType(ProjectClassLoader.java:114)
> 	at org.drools.core.common.ProjectClassLoader.loadClass(ProjectClassLoader.java:84)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> 	... 15 more
> {noformat}

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