[jboss-jira] [JBoss JIRA] (DROOLS-1186) Setting the planning variable nullable in nurserostering examples causes Drools NPE

[Jiri Locker (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-1186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jiri Locker reopened DROOLS-1186:
---------------------------------


Hi, I hit the NPE again while working on DROOLS-1187. I've isolated as much as possible. There is only a single rule in score DRL and 13 facts inserted into WM. The exception occurs in move 29 and depends on move 28, the previous 28 moves are skipped (not evaluated).

Please take a look at https://github.com/yurloc/optaplanner/tree/drools-1187-NPE. The README contains steps to reproduce and also the test output.

> Setting the planning variable nullable in nurserostering examples causes Drools NPE
> -----------------------------------------------------------------------------------
>
>                 Key: DROOLS-1186
>                 URL: https://issues.jboss.org/browse/DROOLS-1186
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 6.2.0.Final, 6.3.0.Final
>         Environment: Windows 7 x 64, JDK 8u66, IDE netbeans 8.0.1.
>            Reporter: Julio Bellon Aguilera
>            Assignee: Mario Fusco
>            Priority: Critical
>             Fix For: 7.0.0.Beta1
>
>         Attachments: PLANNER_488.patch
>
>
> If you set the planning variable to "nullable=true", firstable, causes a IllegalStateException.
> fixed that, causes the first NPE, and fixed that, causes other NPE unfixed:
> Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException:
> Caused by: java.lang.NullPointerException
>     at org.drools.core.phreak.RuleNetworkEvaluator.deleteChildLeftTuple(RuleNetworkEvaluator.java:778)



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