Re: [rules-users] NullPointerException at org.drools.compiler.kie.builder.impl.KieContainerImpl.updateToVersion

Hello, I'm trying to add a new rule on the fly like here: https://github.com/droolsjbpm/drools/blob/master/drools-compiler/src/test... Here is the method to add a rule, once the KieSession is created and configured: public void addRule(String rule){ KieServices ks= KieServices.Factory.get(); ReleaseId rid= ks.newReleaseId("org.kie", "businessrules", "1.0"); KieFileSystem kfs = ks.newKieFileSystem(); kfs.generateAndWritePomXML(rid); kfs.write("src/main/resources/rule.drl",rule); KieBuilder kb = ks.newKieBuilder(kfs).buildAll(); if( kb.getResults().hasMessages( org.kie.api.builder.Message.Level.ERROR ) ) { for( org.kie.api.builder.Message result : kb.getResults().getMessages() ) { System.err.println(result.getText()); } } InternalKieModule kieModule = (InternalKieModule) ks.getRepository() .getKieModule(rid); byte[] jar = kieModule.getBytes(); Resource jarRes = ks.getResources().newByteArrayResource(jar); ks.getRepository().addKieModule(jarRes); kieContainer.updateToVersion(rid); } But when I'm calling this method, I get the error below: java.lang.NullPointerException at org.drools.core.util.LinkedList.remove(LinkedList.java:168) at org.drools.core.phreak.AddRemoveRule.mergeSegment(AddRemoveRule.java:938) at org.drools.core.phreak.AddRemoveRule.correctSegmentOnSplitOnRemove(AddRemoveRule.java:377) at org.drools.core.phreak.AddRemoveRule.removeRule(AddRemoveRule.java:182) at org.drools.core.reteoo.ReteooBuilder.removeTerminalNode(ReteooBuilder.java:171) at org.drools.core.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:165) at org.drools.core.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:1406) at org.drools.core.reteoo.ReteooRuleBase.removeObjectsGeneratedFromResource(ReteooRuleBase.java:1652) at org.drools.compiler.compiler.PackageBuilder.removeObjectsGeneratedFromResource(PackageBuilder.java:3898) at org.drools.compiler.kie.builder.impl.KieContainerImpl.updateToVersion(KieContainerImpl.java:114) For the line : "kieContainer.updateToVersion(rid);" But if I'm firing the rules once (kieSession.fireAllRules();) before adding the new rule, I don't get the exception O_o Someone has any idea why ? thanks! -- View this message in context: http://drools.46999.n3.nabble.com/NullPointerException-at-org-drools-comp... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users