[rules-users] No ClassLoaders found for: String
Edson Tirelli
tirelli at post.com
Tue Jan 13 11:03:32 EST 2009
Yes, I see. Can you please manually update your local mvel jar to version
2.0.6 (latest) and try again? I am talking to the MVEL author to make sure
the problem is fixed in the latest version, but of course, if you can
confirm this on your side, it would be best.
[]s
Edson
2009/1/13 psentosa <psentosa at yahoo.com>
>
> I'm using maven to manage my libraries, thus I add these line in my
> pom.xml:
> <dependency>
> <groupId>org.drools</groupId>
> <artifactId>drools-api</artifactId>
> <version>5.0.0.M4</version>
> </dependency>
> <dependency>
> <groupId>org.drools</groupId>
> <artifactId>drools-core</artifactId>
> <version>5.0.0.M4</version>
> </dependency>
>
> And I can see that mvel2-2.0.4 has been added, besides drools-api and core
> 5.0.0.M4
> Thanks for the reply
>
>
>
> Edson Tirelli-3 wrote:
> >
> > What MVEL version are you using?
> >
> > []s
> > Edson
> >
> > 2009/1/13 psentosa <psentosa at yahoo.com>
> >
> >>
> >> Hallo,
> >>
> >> I have a rule like this, defined in Guvnor:
> >> when
> >> Activity ( $date : date, workingTime > 240)
> >>
> >> then
> >> System.out.println("Working time limit has been reached");
> >> violatedRegulation.add(new String("regulation.general.working1"));
> >>
> >>
> >> violatedRegulation is a List<String> which I set as a global because
> >> later
> >> on I will extract the content of that list which is a key defined in a
> >> properties file
> >>
> >> ksession.setGlobal("violatedRegulation", violatedRegulation);
> >> ksession.executeObject(activity);
> >>
> >>
> >> but then I got the following exception:
> >> 15:52:59,687 INFO [STDOUT] Working time limit has been reached
> >> 15:52:59,687 ERROR [MyExceptionInterceptor] [Error: could not create
> >> constructor: No ClassLoaders found for: String ]
> >> [Near : {... Unknown ....}]
> >> ^
> >> org.drools.runtime.rule.ConsequenceException: [Error: could not create
> >> constructor: No ClassLoaders found for: String ]
> >> [Near : {... Unknown ....}]
> >> ^
> >> at
> >>
> >>
> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23)
> >> at
> >> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:918)
> >> at
> >> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:871)
> >> at
> >> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1035)
> >> at
> >>
> >>
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:612)
> >> at
> >>
> >>
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:589)
> >> at
> >>
> >>
> org.drools.impl.StatelessKnowledgeSessionImpl.executeObject(StatelessKnowledgeSessionImpl.java:158)
> >> ..................
> >>
> >> Caused by: [Error: could not create constructor: No ClassLoaders found
> >> for:
> >> String ]
> >> [Near : {... Unknown ....}]
> >> ^
> >> at
> >>
> >>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeObjectCreation(ReflectiveAccessorOptimizer.java:805)
> >> at
> >>
> >>
> org.mvel2.optimizers.dynamic.DynamicOptimizer.optimizeObjectCreation(DynamicOptimizer.java:80)
> >> at
> >>
> >>
> org.mvel2.ast.NewObjectNode.getReducedValueAccelerated(NewObjectNode.java:148)
> >> at
> >>
> org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:37)
> >> at
> >>
> >>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:590)
> >> at
> >>
> >>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:285)
> >> at
> >>
> >>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:134)
> >> at
> >>
> >>
> org.mvel2.optimizers.dynamic.DynamicOptimizer.optimizeAccessor(DynamicOptimizer.java:61)
> >> at
> >> org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:127)
> >> at org.mvel2.MVELRuntime.execute(MVELRuntime.java:91)
> >> at
> >>
> org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:101)
> >> at org.mvel2.MVEL.executeExpression(MVEL.java:1025)
> >> at
> >> org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:89)
> >> at
> >> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:909)
> >> ... 97 more
> >> Caused by: java.lang.ClassNotFoundException: No ClassLoaders found for:
> >> String
> >> at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:306)
> >> at
> >>
> >>
> org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:521)
> >> at
> >>
> >>
> org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415)
> >> at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
> >> at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
> >> at java.lang.Class.forName0(Native Method)
> >> at java.lang.Class.forName(Class.java:164)
> >> at org.mvel2.util.ParseTools.createClass(ParseTools.java:458)
> >> at org.mvel2.util.ParseTools.findClass(ParseTools.java:796)
> >> at
> >>
> >>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileConstructor(ReflectiveAccessorOptimizer.java:832)
> >> at
> >>
> >>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeObjectCreation(ReflectiveAccessorOptimizer.java:799)
> >> ... 110 more
> >>
> >> Any help would be very appreciated
> >>
> >> ps: the very same rule worked with drools 4.0.7
> >>
> >> Regards
> >>
> >>
> >>
> >>
> >> --
> >> View this message in context:
> >>
> http://www.nabble.com/No-ClassLoaders-found-for%3A-String-tp21437370p21437370.html
> >> Sent from the drools - user mailing list archive at Nabble.com.
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
> >
> >
> > --
> > Edson Tirelli
> > JBoss Drools Core Development
> > JBoss, a division of Red Hat @ www.jboss.com
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/No-ClassLoaders-found-for%3A-String-tp21437370p21438374.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
--
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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