[jboss-jira] [JBoss JIRA] (JBRULES-3460) NPE when using Tabu

NPE when using Tabu ------------------- Key: JBRULES-3460 URL: https://issues.jboss.org/browse/JBRULES-3460 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-planner Affects Versions: 5.4.0.Beta2, 5.4.0.CR1 Environment: java version "1.7.0_b147-icedtea" OpenJDK Runtime Environment (fedora-2.1.fc17.2-x86_64) OpenJDK 64-Bit Server VM (build 22.0-b10, mixed mode) Reporter: Lukáš Petrovický Assignee: Geoffrey De Smet Whenever I configure tabu search (be it solution, move or planning entity) in my acceptor, I get the following NPE: Exception in thread "main" java.lang.NullPointerException at org.drools.planner.core.localsearch.decider.acceptor.tabu.AbstractTabuAcceptor.stepTaken(AbstractTabuAcceptor.java:163) at org.drools.planner.core.localsearch.decider.acceptor.CompositeAcceptor.stepTaken(CompositeAcceptor.java:69) at org.drools.planner.core.localsearch.decider.DefaultDecider.stepTaken(DefaultDecider.java:166) 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:183) at org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:151) at org.drools.planner.examples.ras2012.App.main(App.java:25) Looking at the relevant place in code, we find: Integer oldTabuStepIndexInteger = tabuToStepIndexMap.get(oldTabu); int oldTabuStepCount = tabuStepIndex - oldTabuStepIndexInteger; // at least 1 It appears that the code doesn't cover the case where tabuToStepIndexMap doesn't contain oldTabu. Should a reproducer be needed, please look at the following Github repo, configure the solver to use tabus, and launch the application via App.java: https://github.com/triceo/ras12