[jboss-jira] [JBoss JIRA] Updated: (JBRULES-2912) Planner: Divide by zero exception on timeMillisSpend on a fast computer

Planner: Divide by zero exception on timeMillisSpend on a fast computer ----------------------------------------------------------------------- Key: JBRULES-2912 URL: https://issues.jboss.org/browse/JBRULES-2912 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-planner Affects Versions: 5.1.1.FINAL Environment: Windows, Intel desktop-class, Java6 (bug is not environment-specific) Reporter: David Faulkner Assignee: Geoffrey De Smet Labels: bug Fix For: 5.2.0.M2 In org.drools.planner.core.localsearch.DefaultLocalSearchSolver::solvingEnded, there is potentially a divide by zero that occurs on the line: long averageCalculateCountPerSecond = localSearchSolverScope.getCalculateCount() * 1000L / timeMillisSpend; if timeMillisSpend is zero. Although in theory the likelihood of this occurring in practically nothing, we have actually seen it occur on a POC project with long running Planner jobs. An appropriate guard should be added to this calculation to ensure that this error cannot occur.