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

[Nandor Galambosi (JIRA)]

Nandor Galambosi created DROOLS-404:
---------------------------------------

             Summary: 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: Mark Proctor


If I reuse a KieSession for multiple times, it seems to forget about a function defined in the DRL file.
DRL: 
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
Exception:
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

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