[rules-users] NullPointerException during removing knowledge packages

[Piotr Jedrychowski]

I've downloaded last stable build (number 3845, made 2010-04-14) from 
Drools Hudson (http://hudson.jboss.org/hudson/job/drools/). After 
running my tests I got same problem (but little different StackTrace):

java.lang.NullPointerException
     at org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:235)
     at org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:413)
     at 
org.drools.common.AbstractRuleBase.removeRule(AbstractRuleBase.java:732)
     at 
org.drools.common.AbstractRuleBase.removePackage(AbstractRuleBase.java:660)
     at 
org.drools.impl.KnowledgeBaseImpl.removeKnowledgePackage(KnowledgeBaseImpl.java:166)

Maybe I should download Drools from other place?

Piotr




On 2010-04-21 19:36, Edson Tirelli wrote:
>
>    I fixed a couple problems with rule removal in trunk. Can you check 
> if trunk works for you?
>
>    Edson
>
> 2010/4/21 Piotr Jedrychowski <pjedrychowski at proximetry.pl 
> <mailto:pjedrychowski at proximetry.pl>>
>
>     Hello.
>
>     I have a problem with removing knowledge packages. During running this
>     source code
>     Collection<KnowledgePackage> knowledgePackages =
>     knowledgeBase.getKnowledgePackages();
>     if (knowledgePackages != null) {
>         List<String> packageNames = new ArrayList<String>();
>         for (KnowledgePackage singlePackage : knowledgePackages) {
>             packageNames.add(singlePackage.getName());
>         }
>
>         for (String singlePackageName : packageNames) {
>             knowledgeBase.removeKnowledgePackage(singlePackageName);
>         }
>     }
>
>     I'm getting NullPointerException with this StackTrace:
>     java.lang.NullPointerException
>      at org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:235)
>      at
>     org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:366)
>      at
>     org.drools.common.AbstractRuleBase.removeRule(AbstractRuleBase.java:712)
>      at
>     org.drools.common.AbstractRuleBase.removePackage(AbstractRuleBase.java:640)
>      at
>     org.drools.impl.KnowledgeBaseImpl.removeKnowledgePackage(KnowledgeBaseImpl.java:166)
>
>     I found this links in Internet:
>     http://seamframework.org/Community/DroolsGuvnorCacheIssue
>     http://lists.jboss.org/pipermail/rules-users/2007-November/003917.html
>
>     Maybe someone had similar problem and could help me?
>
>     I'm using:
>     * JBoss 4.2.3.GA <http://4.2.3.GA>
>     * Drools 5.0
>
>     Regards,
>     Piotr
>     _______________________________________________
>     rules-users mailing list
>     rules-users at lists.jboss.org <mailto:rules-users at lists.jboss.org>
>     https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
>
> -- 
>  Edson Tirelli
>  JBoss Drools Core Development
>  JBoss by Red Hat @ www.jboss.com <http://www.jboss.com>
>
>
> _______________________________________________
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> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>    

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