[jboss-jira] [JBoss JIRA] (DROOLS-404) NoClassDefFoundError happens when using "function"s in drl
Nandor Galambosi (JIRA)
issues at jboss.org
Fri Jan 17 07:29:32 EST 2014
[ https://issues.jboss.org/browse/DROOLS-404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nandor Galambosi updated DROOLS-404:
------------------------------------
Description:
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}
was:
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}
Exception:
{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}
> 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 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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