HOw to find out, what causes an auto scheduling exception

[Bernhard Burger]

I am receiving exceptions in auto scheduling (preparing for a small demo). Any ideas how I could actually find out, what causes the exception?

2020-02-28 14:10:32,894+0100 pool-27-thread-3 ERROR admin 850x301x1 19u562p 0:0:0:0:0:0:0:1 /rest/jpo/1.0/scheduling [c.a.r.j.c.scheduling.jobs.CalculationJob] Exception during calculation.
java.lang.NullPointerException
at com.atlassian.rm.jpo.scheduling.roadmap.scheduling.algo.construct.common.MutableResourceGroup.schedule(MutableResourceGroup.java:135)
at com.atlassian.rm.jpo.scheduling.roadmap.scheduling.algo.construct.GreedyRoadmapScheduler.updateResources(GreedyRoadmapScheduler.java:245)
at com.atlassian.rm.jpo.scheduling.roadmap.scheduling.algo.construct.GreedyRoadmapScheduler.handleFixedSlotProblem(GreedyRoadmapScheduler.java:239)
at com.atlassian.rm.jpo.scheduling.roadmap.scheduling.algo.construct.GreedyRoadmapScheduler.schedule(GreedyRoadmapScheduler.java:100)
at com.atlassian.rm.jpo.scheduling.roadmap.scheduling.solver.GreedyRoadmapPlanningSolver.solveRoadmapPlanningProblem(GreedyRoadmapPlanningSolver.java:45)
at com.atlassian.rm.jpo.core.scheduling.calc.NonPersistingSchedulingSolutionService.getRoadmapScheduleInternal(NonPersistingSchedulingSolutionService.java:156)
at com.atlassian.rm.jpo.core.scheduling.calc.NonPersistingSchedulingSolutionService.getRoadmapSchedule(NonPersistingSchedulingSolutionService.java:118)
at com.atlassian.rm.jpo.core.scheduling.calc.NonPersistingSchedulingSolutionService.getSchedulingSolution(NonPersistingSchedulingSolutionService.java:74)
at com.atlassian.rm.jpo.core.scheduling.jobs.CalculationJob.run(CalculationJob.java:51)
at com.atlassian.rm.jpo.env.threading.JiraLongRunningExecutorRegistry$1$1.run(JiraLongRunningExecutorRegistry.java:48)
at com.atlassian.rm.common.bridges.jira.threading.LongRunningExecutorServiceBridge76.lambda$execute$0(LongRunningExecutorServiceBridge76.java:104)
at com.atlassian.rm.common.bridges.jira.threading.JiraSafeThreadService.lambda$execute$0(JiraSafeThreadService.java:47)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)