Re: [rules-users] Planner has trouble creating a configurer: how to debug

I have news for you! I had an obvious and (bad surprise) buggy mismatch. The obvious mismatch was: setBlockList and getBlocklist (small 'l' in the getter). The other mismatch was isFixed and setFixed. *Drools hates the 'is'* because (as I guessed) of it's introspector mechanism. It worked only when I renamed it to getFixed. Your bugfix would have harmed instead of helped, as it would have let that error pass silently. Please open an issue to address this. Wish I wasnt religious to name boolean getters with 'is'. I will notify of further problems once the problem gets back on track. ge0ffrey wrote > > Hi, > > The NullPointerException should definitely not happen, you should get a > decent error message describing what's wrong. > It's fixed in 5.4.0.Beta1. > > It looks like you're running into: > https://issues.jboss.org/browse/JBRULES-3247 > Upgrade to planner 5.4.0.Beta1 > or add a getter for that setter. > > Op 28-01-12 06:17, aitchnyu schreef: >> I tried to create a solver from XML configuration. But the entire process >> returns a *cryptic error message *that makes no sense. >> >> How do I fix this? And how can I make sense of this to actually solve >> similar problems like this? >> >> Please excuse me if I made any bad karma. This is my first post on this >> (and >> any) mailing list. >> >> jesvin@Jesvin-Technovia:~/dev/drools/sudoku$ java App >> Exception in thread "main" java.lang.NullPointerException >> at >> org.drools.planner.core.domain.solution.SolutionDescriptor.processPropertyAnnotations(SolutionDescriptor.java:69) >> at >> org.drools.planner.core.domain.solution.SolutionDescriptor.<init>(SolutionDescriptor.java:61) >> at >> org.drools.planner.config.solver.SolverConfig.buildSolutionDescriptor(SolverConfig.java:197) >> at >> org.drools.planner.config.solver.SolverConfig.buildSolver(SolverConfig.java:167) >> at >> org.drools.planner.config.XmlSolverConfigurer.buildSolver(XmlSolverConfigurer.java:103) >> at App.createSolver(App.java:62) >> at App.main(App.java:40) >> >> The function that throws it is listed here. The line is of course `return >> configurer.buildSolver();`. >> >> private static Solver createSolver(){ >> XmlSolverConfigurer configurer = new XmlSolverConfigurer(); >> File file = new File("solver.xml"); >> FileInputStream fin = null; >> try{ >> fin = new FileInputStream(file); >> } >> catch(IOException e){ >> System.out.println("Unable to read drl"); >> } >> configurer.configure(fin); >> >> //configurer.configure("/home/jesvin/dev/drools/sudoku/solver.xml"); >> return configurer.buildSolver(); >> } >> >> The content of the XML: >> >> <?xml version="1.0" encoding="UTF-8"?> >> <solver> >> <environmentMode>DEBUG</environmentMode> >> >> <solutionClass>domain.Sudoku</solutionClass> >> <planningEntityClass>domain.Digit</planningEntityClass> >> <scoreDrl>score.drl</scoreDrl> >> <scoreDefinition> >> <scoreDefinitionType>SIMPLE</scoreDefinitionType> >> </scoreDefinition> >> >> <termination> >> <scoreAttained>0</scoreAttained> >> </termination> >> >> <constructionHeuristic> >> <constructionHeuristicType>FIRST_FIT</constructionHeuristicType> >> >> >> <moveFactoryClass>solution.RowChangeMoveFactory</moveFactoryClass> >> </selector> >> <acceptor> >> <completeSolutionTabuSize>1000</completeSolutionTabuSize> >> </acceptor> >> <forager> >> >> </forager> >> </localSearch> >> </solver> >> >> -- >> View this message in context: >> http://drools.46999.n3.nabble.com/Planner-has-trouble-creating-a-configur... >> Sent from the Drools: User forum mailing list archive at Nabble.com. >> _______________________________________________ >> rules-users mailing list >> rules-users@.jboss >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > -- > With kind regards, > Geoffrey De Smet > > > _______________________________________________ > rules-users mailing list > rules-users@.jboss > https://lists.jboss.org/mailman/listinfo/rules-users > -- View this message in context: http://drools.46999.n3.nabble.com/Planner-has-trouble-creating-a-configur... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users