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

[tia]

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.