Re: [rules-users] NullPointerException when calling Scan manually
Dear,
thanks for the quick response, I lost track of this entry due to some
deadlines. I was planning to compile a package with all the necessary code
but as mentioned, the issue only shows up periodically and currently I can
not reproduce it anymore. A while back I wrote a hack that simply retries
when the scanner fails and in the mean time, the code changed quite a bit.
I have placed a giant debug statement in that hack to make sure that I
notice it when it happens again. If it does I will provide you with the
code.
Kind Regards,
Brecht
On Thu, 27 Feb 2014 13:43:47 +0100, Davide Sottara <dsotty(a)gmail.com>
wrote:
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(a)vub.ac.be
> -------------------------------------------------------------
>
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--
-------------------------------------------------------------
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(a)vub.ac.be
-------------------------------------------------------------
---
Dit e-mailbericht bevat geen virussen en malware omdat avast! Antivirus-bescherming actief
is.
http://www.avast.com