[rules-users] NullPointerException when calling Scan manually

[Davide Sottara]

Could you please share the unit test?
Thanks
Davide

On 02/27/2014 11:42 AM, Brecht De Rooms wrote:
> 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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