NullPointerException with executable model using accumulate max with null Date field ------------------------------------------------------------------------------------ Key: DROOLS-4990 URL: https://issues.redhat.com/browse/DROOLS-4990 Project: Drools Issue Type: Bug Components: core engine, executable model Affects Versions: 7.32.0.Final Reporter: Martin Weiler Assignee: Mario Fusco Priority: Major Labels: support Executing a rule containing accumulate max, eg: {code} rule AccumulateMaxDate when $max1 : Number() from accumulate( StockTick(isSetDueDate == true ,$time : dueDate); max($time.getTime().getTime())) then end {code} fails with a NPE at runtime if the StockDate.dueDate field is null: {noformat} Caused by: java.lang.NullPointerException at defaultpkg.RulesA0DFC3D10EA29F3818B87E11918D8020RuleMethods0.lambda$rule_AccumulateMaxDate$c9e019d8$1(RulesA0DFC3D10EA29F3818B87E11918D8020RuleMethods0.java:34) at org.drools.model.functions.Function1$Impl.apply(Function1.java:35) at org.drools.model.view.BindViewItem1.eval(BindViewItem1.java:85) at org.drools.modelcompiler.constraints.BindingEvaluator.evaluate(BindingEvaluator.java:39) at org.drools.modelcompiler.constraints.BindingEvaluator.evaluate(BindingEvaluator.java:35) at org.drools.modelcompiler.constraints.LambdaAccumulator$BindingAcc.getAccumulatedObject(LambdaAccumulator.java:154) at org.drools.modelcompiler.constraints.LambdaAccumulator.accumulate(LambdaAccumulator.java:88) at org.drools.core.rule.SingleAccumulate.accumulate(SingleAccumulate.java:97) ... 53 more {noformat}