[rules-users] NullPointerException when calling Scan manually

[Brecht De Rooms]

Dear Drools users,

I just merged all my code to Drools 6.0.1 and I am happy to see that it is  
more stable. Several issues I had with 5.6.x do not present themselves in  
6.0.1. I am still stuck on one bug however that occurs randomly. I wrote a  
unit test in which I deploy new rules and then call scanNow. Often the  
unit test succeeds, but sometimes it throws this nullpointer exception.


java.lang.NullPointerException
	at  
org.drools.core.rule.Package.getRulesGeneratedFromResource(Package.java:668)
	at  
org.drools.core.rule.Package.removeRulesGeneratedFromResource(Package.java:658)
	at  
org.drools.core.reteoo.ReteooRuleBase.removeObjectsGeneratedFromResource(ReteooRuleBase.java:1653)
	at  
org.drools.compiler.compiler.PackageBuilder.removeObjectsGeneratedFromResource(PackageBuilder.java:4150)
	at  
org.drools.compiler.kie.builder.impl.KieContainerImpl.updateToVersion(KieContainerImpl.java:149)
	at  
org.kie.scanner.KieRepositoryScannerImpl.updateKieModule(KieRepositoryScannerImpl.java:214)
	at  
org.kie.scanner.KieRepositoryScannerImpl.scanNow(KieRepositoryScannerImpl.java:204)
	at derooms.be.engine.RuleEngine.scanNow(RuleEngine.java:111)
	at  
derooms.be.engine.ruleDeployment.RulesPackageWriter.deployRules(RulesPackageWriter.java:104)
	at  
derooms.be.engine.ruleDeployment.RulesPackageWriter.addRules(RulesPackageWriter.java:84)
	at  
derooms.be.engine.dynamicRuleWatcher.RuleFileHandler.handleModifiedFile(RuleFileHandler.java:50)
	at  
derooms.be.engine.dynamicRuleWatcher.RulesWatcherRunnable.run(RulesWatcherRunnable.java:105)
	at java.lang.Thread.run(Thread.java:744)


Does anyone have an idea what the problem might be?
Kind Regards,
Brecht

-------------------------------------------------------------
Brecht De Rooms
Phd Student @ WISE
Department of Computer Science
Vrije Universiteit Brussel
Pleinlaan 2, B-1050 Brussels, Belgium

office: 10 G 731f
phone: +32 2 629 37 49
email: bderooms at vub.ac.be
-------------------------------------------------------------

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