Version: 5.5.0 Drools Expert + Fusion Stateful ksession in STREAM mode In an integration test, I ___sometimes_____!!! (always the same variables... ) get the following Exception:
Exception in thread "Thread-1" java.lang.NullPointerException
at
org.drools.base.com.myApp.model.Measurement1965915394$getValue.getIntValue(Unknown
Source)
at
org.drools.base.extractors.BaseIntClassFieldReader.getValue(BaseIntClassFieldReader.java:52)
at org.drools.base.ClassFieldReader.getValue(ClassFieldReader.java:87)
at org.drools.rule.Declaration.getValue(Declaration.java:233)
at
org.drools.base.mvel.MVELCompilationUnit.updateFactory(MVELCompilationUnit.java:362)
at
org.drools.base.mvel.MVELCompilationUnit.updateFactory(MVELCompilationUnit.java:289)
at
org.drools.rule.constraint.MvelConditionEvaluator.evaluate(MvelConditionEvaluator.java:59)
at
org.drools.rule.constraint.MvelConditionEvaluator.ensureBranchEvaluation(MvelConditionEvaluator.java:117)
at
org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:101)
at
org.drools.rule.constraint.MvelConditionEvaluator.ensureBranchEvaluation(MvelConditionEvaluator.java:120)
at
org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:101)
at
org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:90)
at
org.drools.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:82)
at
org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:270)
at
org.drools.rule.constraint.MvelConstraint.access$200(MvelConstraint.java:51)
at
org.drools.rule.constraint.MvelConstraint$ConditionJitter.run(MvelConstraint.java:250)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:695)
Where Measurement is one of my custom model classes and an @event.
I tried to catch the exception but I don't know where it actually occurs. There
is one rule that retracts Measurement in certain situations - the problem might
be related to that (is it unwise to retract @event ?).
Any idea?
- Alex
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