[rules-users] uninformative rule parsing/compiling error -> org.drools.rule.Rule cannot be cast to org.drools.rule.Query

Dear rules users, I am currently writing my own Drools-server since I wanted more control than the drools-execution server (and it never worked very well here) where I can send rules/facts over JMS/AQMP/STOMP. Rules which are sent are saved on the server-side in DRL files that are monitored. That way, I can debug easily by changing the sent files. However, when I sent the following code, the agent does not provide me with an error message at all and hangs: / //rule "TrackerRemote.TrackerUpdate"// // when// // message:TrackerRemote.TrackerUpdate()// // then// // System.out.println("Tracker: " + message);// //end/ at first I thought it was because TrackerRemote.TrackerUpdate is not in that package anymore and thus unknown so I tried to send the rule listed below which gives me the nice and expected error: Unable to resolve ObjectType 'NotExistingType' : [Rule name='Foo'] /rule "Foo"// // when // // NotExistingType( bloe == "test")// // then// // System.out.println("this should not work");// //end/ when I compile the rule myself with a KnowledgeBuilder: KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); InputStream is = new ByteArrayInputStream(drlstring.getBytes()); kbuilder.add( ResourceFactory.newInputStreamResource(is),ResourceType.DRL ); I receive the error: org.drools.rule.Rule cannot be cast to org.drools.rule.Query which I think doesn't tell me anything about the mistake I made in my rule, is this a Drools bug and should I post this somewhere? Kind Regards, De Rooms Brecht Full Stack: java.lang.ClassCastException: org.drools.rule.Rule cannot be cast to org.drools.rule.Query at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:175) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:118) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:67) at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:84) at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2706) at org.drools.compiler.PackageBuilder.compileRules(PackageBuilder.java:930) at org.drools.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:839) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:831) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:467) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:673) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:45) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:34) at derooms.be.server.listeners.RulesListener.processMessage(RulesListener.java:33) at derooms.be.server.listeners.AbstractListener.onMessage(AbstractListener.java:35) at org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1321) at org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131) at org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202) at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129) at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722)