[rules-users] ClassNotFound exception running brms example (newbie)

Fernando Meyer fmcamargo at gmail.com
Sun Sep 30 20:09:20 EDT 2007 

sorry, you need to get the latest core version snapshot to correct this
problem, plus the new brms as well


On 9/30/07, Fernando Meyer <fmcamargo at gmail.com> wrote:
>
> Hi,
>
> Are you using the latest brms build ? if the anwser is not, please
> download the latest version from https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/
> it was a missing class in the drools-core library.
>
> On 9/30/07, Martin Fuzzey <mfuzzey at neuf.fr> wrote:
> >
> > Hi,
> >
> > I am trying to run the insurance example with the brms
> > after replacing the client mvel jar with the one used by the brms web
> > app as mentionned on this list I get this exeception (full stacktrace
> > below)
> >
> > java.lang.ClassNotFoundException:
> > org.drools.rule.builder.dialect.mvel.MVELDialect$ModifyInterceptor
> >
> > adding the drools-compiler-4.0.1.jar to the client classpath fixes this
> > but I thought the rules were supposed to be compiled by the brms. Indeed
> > the documentation says :
> >
> > The rule agent is a component which is embedded in the core runtime of
> > the rules engine. To use this, you don't need any extra components. In
> > fact, if you are using the BRMS, your application should only need to
> > include the drools-core.jar in its classpath, and no other rules
> > specific dependencies.
> >
> > so am I misunderstanding something or is this a bug?
> >
> > Thanks,
> >
> > Martin Fuzzey
> >
> >
> > RuleAgent(insuranceconfig) INFO (Sun Sep 30 14:02:33 CEST 2007):
> > Configuring with newInstance=true, secondsToRefresh=30
> > RuleAgent(insuranceconfig) INFO (Sun Sep 30 14:02:33 CEST 2007):
> > Configuring package provider : URLScanner monitoring URLs:
> >
> > http://localhost:8080/drools-jbrms/org.drools.brms.JBRMS/package/org.acme.insurance/MF1
> > with local cache dir of /home/martin/tmp
> > RuleAgent(insuranceconfig) EXCEPTION (Sun Sep 30 14:02:34 CEST 2007):
> > org.drools.rule.builder.dialect.mvel.MVELDialect$ModifyInterceptor .
> > Stack trace should follow.
> > java.lang.ClassNotFoundException:
> > org.drools.rule.builder.dialect.mvel.MVELDialect$ModifyInterceptor
> >          at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
> >          at java.security.AccessController.doPrivileged(Native Method)
> >          at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
> >          at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> >          at sun.misc.Launcher$AppClassLoader.loadClass (Launcher.java
> > :276)
> >          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:247)
> >          at
> > java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:604)
> >          at
> > org.drools.common.DroolsObjectInputStream.resolveClass(
> > DroolsObjectInputStream.java :74)
> >          at
> > java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
> >          at
> > java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
> >          at
> > java.io.ObjectInputStream.readOrdinaryObject (ObjectInputStream.java
> > :1732)
> >          at
> > java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
> >          at java.io.ObjectInputStream.readObject(ObjectInputStream.java
> > :351)
> >          at java.util.HashMap.readObject (HashMap.java:1029)
> >          at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
> >          at
> > sun.reflect.DelegatingMethodAccessorImpl.invoke(
> > DelegatingMethodAccessorImpl.java:25)
> >          at java.lang.reflect.Method.invoke (Method.java:597)
> >          at
> > java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
> >          at
> > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846)
> >          at
> > java.io.ObjectInputStream.readOrdinaryObject (ObjectInputStream.java
> > :1753)
> >          at
> > java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
> >          at
> > java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945)
> >          at
> > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869)
> >          at
> > java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java
> > :1753)
> >          at
> > java.io.ObjectInputStream.readObject0(ObjectInputStream.java :1329)
> >          at
> > java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945)
> >          at
> > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869)
> >          at
> > java.io.ObjectInputStream.readOrdinaryObject (ObjectInputStream.java
> > :1753)
> >          at
> > java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
> >          at
> > java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945)
> >          at
> > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869)
> >          at
> > java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java
> > :1753)
> >          at
> > java.io.ObjectInputStream.readObject0(ObjectInputStream.java :1329)
> >          at
> > java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945)
> >          at
> > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869)
> >          at
> > java.io.ObjectInputStream.readOrdinaryObject (ObjectInputStream.java
> > :1753)
> >          at
> > java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
> >          at java.io.ObjectInputStream.readObject(ObjectInputStream.java
> > :351)
> >          at java.util.HashMap.readObject (HashMap.java:1029)
> >          at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
> >          at
> > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccesso
> > rImpl.java:25)
> >          at java.lang.reflect.Method.invoke (Method.java:597)
> >          at
> > java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
> >          at
> > java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1846)
> >          at
> > java.io.ObjectInputStream.readOrdinaryObject (ObjectInputStream.java
> > :1753)
> >          at
> > java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
> >          at java.io.ObjectInputStream.readObject(ObjectInputStream.java
> > :351)
> >          at org.drools.rule.Package.readExternal (Package.java:189)
> >          at
> > java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
> >          at
> > java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java
> > :1751)
> >          at
> > java.io.ObjectInputStream.readObject0 (ObjectInputStream.java:1329)
> >          at java.io.ObjectInputStream.readObject(ObjectInputStream.java
> > :351)
> >          at
> > org.drools.agent.HttpClientImpl.fetchPackage(HttpClientImpl.java:54)
> >          at org.drools.agent.URLScanner.readPackage (URLScanner.java
> > :137)
> >          at org.drools.agent.URLScanner.getChangeSet(URLScanner.java
> > :109)
> >          at
> > org.drools.agent.URLScanner.loadPackageChanges(URLScanner.java:88)
> >          at org.drools.agent.RuleAgent.checkForChanges (RuleAgent.java
> > :327)
> >          at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java
> > :295)
> >          at org.drools.agent.RuleAgent.configure(RuleAgent.java:281)
> >          at org.drools.agent.RuleAgent.init(RuleAgent.java :205)
> >          at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:173)
> >          at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:145)
> >          at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java :213)
> >          at
> > org.acme.insurance.launcher.InsuranceBusiness.loadRuleBase(
> > InsuranceBusiness.java:26)
> >          at
> > org.acme.insurance.launcher.InsuranceBusiness.executeExample(
> > InsuranceBusiness.java:14)
> >          at org.acme.insurance.launcher.MainClass.main(MainClass.java
> > :13)
> > RuleAgent(insuranceconfig) WARNING (Sun Sep 30 14:02:35 CEST 2007): Was
> > unable to load a class when loading a package. Perhaps it is missing
> > from this appl
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
>
>
> --
> Fernando Meyer http://fmeyer.org
> JBoss Rules Core Developer
> fmcamargo at gmail.com




-- 
Fernando Meyer http://fmeyer.org
JBoss Rules Core Developer
fmcamargo at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20070930/8f460db7/attachment.html

More information about the rules-users mailing list