[jboss-jira] [JBoss JIRA] Closed: (JBRULES-2788) NPE in AbstractWorkingMemory due to session.retract(null)

[Mark Proctor (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-2788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Proctor closed JBRULES-2788.
---------------------------------



> NPE in AbstractWorkingMemory due to session.retract(null)
> ---------------------------------------------------------
>
>                 Key: JBRULES-2788
>                 URL: https://issues.jboss.org/browse/JBRULES-2788
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core  (expert)
>    Affects Versions: 5.1.1.FINAL
>            Reporter: Wolfgang Laun
>            Assignee: Mark Proctor
>             Fix For: 5.2.0.CR1
>
>
> StatefulKnowledgeSession kSession = ...;
> kSession.retract( null );
> Notice that this might occur if kSession.getFactHandle() returns null because the fact object
> is invalid or already gone etc.
> The above call causes
>  java.lang.NullPointerException
> 	at org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:1261)
> 	at org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:1242)
> 	at org.drools.impl.StatefulKnowledgeSessionImpl.retract(StatefulKnowledgeSessionImpl.java:255)
> 	at resource.Main.exec(Main.java:92)
> Expected: This should be ignored, or throw an Exception with a reasonable diagnostic. (Javadoc does not say that an exception may be thrown.)

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