Drools Planner Divide By Zero Error
-----------------------------------
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: Mark Proctor
In org.drools.palnner.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.
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