[jboss-jira] [JBoss JIRA] (DROOLS-857) NullPointerException error needs to be improved

[Hannah Rosen (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hannah Rosen updated DROOLS-857:
--------------------------------
    Affects Version/s: 6.2.0.Final


> NullPointerException error needs to be improved
> -----------------------------------------------
>
>                 Key: DROOLS-857
>                 URL: https://issues.jboss.org/browse/DROOLS-857
>             Project: Drools
>          Issue Type: Bug
>    Affects Versions: 6.2.0.Final
>         Environment: Java Eclipse
>            Reporter: Hannah Rosen
>            Assignee: Mark Proctor
>              Labels: drools, nullpointerexception, optaplanner-request-for-drools
>
> I am changing around the dinner party example in OptaPlanner and have added a new score rule to the drl:
> {code}
>  rule "sameSleepingPreference"
>  	when
>  		$leftDesignation : SeatDesignation($leftGuest : guest)
>       	$rightDesignation : SeatDesignation(isRightOf($leftDesignation), $rightGuest : guest)
>       
>            eval($leftGuest.sleepingPreference.equals($rightGuest.sleepingPreference))
>           
>     then
>         	scoreHolder.addConstraintMatch(kcontext, +1);
>  end 
> {code}
>  When I run the program with a data sheet of four people, it works fine. However, when I try it with a data sheet of 144 peopIe, I get this null pointer exception: 
> {code:borderStyle=solid}
> 2015-07-23 10:41:59,414 [AWT-EventQueue-0] INFO  Opened: data\dinnerparty\unsolved\hannahWeddingTest.xml
> 2015-07-23 10:42:01,012 [SwingWorker-pool-4-thread-1] INFO  Solving started: time spent (97), best score (uninitialized/-14400), environment mode (REPRODUCIBLE), random (JDK with seed 0).
> Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: Solving failed.
>     at org.optaplanner.examples.common.swingui.SolverAndPersistenceFrame$SolveWorker.done(SolverAndPersistenceFrame.java:297)
>     at javax.swing.SwingWorker$5.run(Unknown Source)
>     at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(Unknown Source)
>     at sun.swing.AccumulativeRunnable.run(Unknown Source)
>     at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(Unknown Source)
>     at javax.swing.Timer.fireActionPerformed(Unknown Source)
>     at javax.swing.Timer$DoPostEvent.run(Unknown Source)
>     at java.awt.event.InvocationEvent.dispatch(Unknown Source)
>     at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
>     at java.awt.EventQueue.access$300(Unknown Source)
>     at java.awt.EventQueue$3.run(Unknown Source)
>     at java.awt.EventQueue$3.run(Unknown Source)
>     at java.security.AccessController.doPrivileged(Native Method)
>     at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
>     at java.awt.EventQueue.dispatchEvent(Unknown Source)
>     at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
>     at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
>     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
>     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>     at java.awt.EventDispatchThread.run(Unknown Source)
> Caused by: java.lang.RuntimeException: org.optaplanner.examples.dinnerparty.solver.Rule_sameSleepingPreference1438171934Eval0Invoker at a59a25b3 : java.lang.NullPointerException
>     at org.drools.core.rule.EvalCondition.isAllowed(EvalCondition.java:123)
>     at org.drools.core.phreak.PhreakEvalNode.doLeftInserts(PhreakEvalNode.java:55)
>     at org.drools.core.phreak.PhreakEvalNode.doNode(PhreakEvalNode.java:39)
>     at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:342)
>     at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
>     at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
>     at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:231)
>     at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:106)
>     at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1016)
>     at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1302)
>     at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1289)
>     at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1262)
>     at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:87)
>     at org.optaplanner.examples.dinnerparty.solver.solution.initializer.DinnerPartySolutionInitializer.initializeSeatDesignationList(DinnerPartySolutionInitializer.java:69)
>     at org.optaplanner.examples.dinnerparty.solver.solution.initializer.DinnerPartySolutionInitializer.changeWorkingSolution(DinnerPartySolutionInitializer.java:41)
>     at org.optaplanner.core.impl.phase.custom.DefaultCustomPhase.doStep(DefaultCustomPhase.java:78)
>     at org.optaplanner.core.impl.phase.custom.DefaultCustomPhase.solve(DefaultCustomPhase.java:60)
>     at org.optaplanner.core.impl.solver.DefaultSolver.runPhases(DefaultSolver.java:213)
>     at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:176)
>     at org.optaplanner.examples.common.business.SolutionBusiness.solve(SolutionBusiness.java:302)
>     at org.optaplanner.examples.common.swingui.SolverAndPersistenceFrame$SolveWorker.doInBackground(SolverAndPersistenceFrame.java:286)
>     at org.optaplanner.examples.common.swingui.SolverAndPersistenceFrame$SolveWorker.doInBackground(SolverAndPersistenceFrame.java:1)
>     at javax.swing.SwingWorker$1.call(Unknown Source)
>     at java.util.concurrent.FutureTask.run(Unknown Source)
>     at javax.swing.SwingWorker.run(Unknown Source)
>     at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
>     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
>     at java.lang.Thread.run(Unknown Source)
> Caused by: java.lang.NullPointerException
>     at org.optaplanner.examples.dinnerparty.solver.Rule_sameSleepingPreference1438171934.eval0(Rule_sameSleepingPreference1438171934.java:8)
>     at org.optaplanner.examples.dinnerparty.solver.Rule_sameSleepingPreference1438171934Eval0InvokerGenerated.evaluate(Unknown Source)
>     at org.optaplanner.examples.dinnerparty.solver.Rule_sameSleepingPreference1438171934Eval0Invoker.evaluate(Unknown Source)
>     at org.drools.core.rule.EvalCondition.isAllowed(EvalCondition.java:118)
>     ... 27 more `
> {code}
> I asked for help on StackOverflow, and Geoffrey, the OptaPlanner creator, told me to report this, as the last nullpointerexception was not specific enough and the error message should be improved.



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