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

[Mark Proctor]

We have a number of add/remove rule tests, could you reproduce your problem, using the same classes and format as outlined in this test class. Ideally adding your reproducer as a single failing test method:
https://github.com/droolsjbpm/drools/blob/master/drools-compiler/src/test/java/org/drools/compiler/integrationtests/AddRemoveRulesTest.java

Creating JIRA’s and submitting pull requests.
http://docs.jboss.org/drools/release/5.6.0.Final/droolsjbpm-introduction-docs/html/gettingstarted.html

Mark
On 6 Jun 2014, at 09:12, tia <rabarijaonadomoina at gmail.com> wrote:

> 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/java/org/drools/compiler/integrationtests/IncrementalCompilationTest.java#L158
> 
> 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-compiler-kie-builder-impl-KieContainerImpl-updateToVersion-tp4029894.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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