[jboss-jira] [JBoss JIRA] (JBRULES-3439) NPE in AbstractTabuAcceptor.stepTaken

[Chris Dolan (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-3439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12682534#comment-12682534 ] 

Chris Dolan commented on JBRULES-3439:
--------------------------------------

Indeed, when I comment out the custom .equals() and .hashCode() in my planning entity class then this problem no longer manifests. However, now my unit tests fail because my Assert.assertEquals() is no longer true. I find this to be dissatifying...

Perhaps the tabu class should use an IdentityHashMap? Or will that just move the failure to another place in the solver?
                
> NPE in AbstractTabuAcceptor.stepTaken
> -------------------------------------
>
>                 Key: JBRULES-3439
>                 URL: https://issues.jboss.org/browse/JBRULES-3439
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-planner
>    Affects Versions: 5.4.0.Beta2
>         Environment: drools-planner-example 5.4.0-SNAPSHOT pulled via Maven on March 29. I believe this corresponds to https://github.com/droolsjbpm/drools-planner/commit/ba38344b7563830eb2a725f78c03be043b1c1f65
>            Reporter: Chris Dolan
>            Assignee: Geoffrey De Smet
>            Priority: Critical
>
> I know this is a weak bug report and I apologize in advance for that...
> I'm writing integration tests for my solver configuration. My code seems to work in my GUI (subclass of CommonApp) but it fails under my junit test. I'm quite new to Drools and Planner so I wouldn't be surprised if the root cause is my fault, but I think a NPE is bad news.
> {noformat}
> 2012-03-30 15:26:05,743 INFO  [DefaultSolver.java:172] Solving started: time spend (25), score (-2hard/-26soft), new best score (-2hard/-26soft), random seed (0). - o.d.p.c.s.DefaultSolver
> 2012-03-30 15:26:05,786 DEBUG [DefaultLocalSearchSolverPhase.java:109]     Step index (0), time spend (68), score (-1hard/-22soft), new best score (-1hard/-22soft), accepted move size (8) for picked step (JobSlot(s2,0) => Job(j1)). - o.d.p.c.l.DefaultLocalSearchSolverPhase
> 2012-03-30 15:26:05,815 DEBUG [DefaultLocalSearchSolverPhase.java:109]     Step index (1), time spend (97), score (0hard/-8soft), new best score (0hard/-8soft), accepted move size (11) for picked step (JobSlot(s1,0) => Job(j2)). - o.d.p.c.l.DefaultLocalSearchSolverPhase
> 2012-03-30 15:26:05,831 DEBUG [DefaultLocalSearchSolverPhase.java:109]     Step index (2), time spend (113), score (0hard/-4soft), new best score (0hard/-4soft), accepted move size (13) for picked step (JobSlot(s1,1) => Job(j1)). - o.d.p.c.l.DefaultLocalSearchSolverPhase
> 2012-03-30 15:26:05,845 DEBUG [DefaultLocalSearchSolverPhase.java:109]     Step index (3), time spend (127), score (0hard/-2soft), new best score (0hard/-2soft), accepted move size (13) for picked step (JobSlot(s2,1) => Job(j2)). - o.d.p.c.l.DefaultLocalSearchSolverPhase
> java.lang.NullPointerException
> 	at org.drools.planner.core.localsearch.decider.acceptor.tabu.AbstractTabuAcceptor.stepTaken(AbstractTabuAcceptor.java:163)
> 	at org.drools.planner.core.localsearch.decider.DefaultDecider.stepTaken(DefaultDecider.java:167)
> 	at org.drools.planner.core.localsearch.DefaultLocalSearchSolverPhase.stepTaken(DefaultLocalSearchSolverPhase.java:107)
> 	at org.drools.planner.core.localsearch.DefaultLocalSearchSolverPhase.solve(DefaultLocalSearchSolverPhase.java:71)
> 	at org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:181)
> 	at org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:150)
> {noformat}

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