Re: [rules-users] NoClassDefFoundError: BaseObjectClassFieldReader

Further testing shows that while the rules engine can locate facts from other plug-ins (facts located in the same plugin as the rules engine work fine, but not realistic to expect that all facts will be co-located in the same plugin), an attempt to reconstitute them using the ByteArrayClassloader will not work. Has anyone been successful using facts located in other plug-ins? I am using Drools 5.M2 with Eclipse 3.4. keithnielsen wrote: > > I have the following rule: > > rule "Retrieve CID Presentation Model" > ruleflow-group "RetrieveCID" > > when > > CIDPresentationModel($cidValue:cidValue,$cidExpirationDate:expirationDate) > then > boolean cidResult = > cidService.verifyCIDIsValid($cidValue,$cidExpirationDate); > CIDResult result = new CIDResult(cidResult); > insert(result); > System.out.println("Executing: Retrieve CID Presentation Model"); > end > > Deep in the bowels of drools there is a call to > ClassFieldAccessorFactory.getClassFieldReader where it attempts to create > a class using the byte array classloader, i.e. final Class<?> newClass = > byteArrayClassLoader.defineClass(className, bytes,PROTECTION_DOMAIN). Its > at this point that a NoClassDefFoundError on the > BaseObjectClassFieldReader. From what I understand of NoClassDefFoundError > it can result when there are two sources of the same class in the > classpath or if there is some reference from the class resulting in the > error to another class that can not be resolved. It only appears in > situations where there is fields involved. It doesnt seem to matter how > simple the object is, the minute I try to use field assignment it throws > an error. > > The rules engine is running as an Eclipse plug-in. > -- View this message in context: http://www.nabble.com/NoClassDefFoundError%3A-BaseObjectClassFieldReader-... Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users