[jboss-jira] [JBoss JIRA] (DROOLS-2608) ArithmeticException happens in average function with BigDecimal type

[Hiroko Miura (JIRA)]

Hiroko Miura created DROOLS-2608:
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             Summary: ArithmeticException happens in average function with BigDecimal type
                 Key: DROOLS-2608
                 URL: https://issues.jboss.org/browse/DROOLS-2608
             Project: Drools
          Issue Type: Bug
          Components: core engine
    Affects Versions: 7.5.0.Final
         Environment: RHDM 7.0
            Reporter: Hiroko Miura
            Assignee: Mario Fusco
         Attachments: RHDM700_averageException.zip

ArithmeticException [1]  could happen in average function for BigDecimal type at the following code

https://github.com/kiegroup/drools/blob/7.5.x/drools-core/src/main/java/org/drools/core/base/accumulators/BigDecimalAverageAccumulateFunction.java#L98

[1]
java.lang.RuntimeException: java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.
	at org.drools.core.rule.SingleAccumulate.getResult(SingleAccumulate.java:144)
	at org.drools.core.phreak.PhreakAccumulateNode.evaluateResultConstraints(PhreakAccumulateNode.java:654)
	at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:97)
	at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:567)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:538)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:373)
	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:333)
	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:169)
	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:127)
	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:212)
	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:87)
	at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:34)
	at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
	at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1067)
	at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:1014)
	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1006)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1318)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1309)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1293)
	at com.sample.AccumulateExceptionTest.averageBigDecimalExceptionTest(AccumulateExceptionTest.java:43)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
	at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
	at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.
	at java.math.BigDecimal.divide(BigDecimal.java:1690)
	at org.drools.core.base.accumulators.BigDecimalAverageAccumulateFunction.getResult(BigDecimalAverageAccumulateFunction.java:98)
	at org.drools.core.base.accumulators.BigDecimalAverageAccumulateFunction.getResult(BigDecimalAverageAccumulateFunction.java:29)
	at org.drools.core.base.accumulators.JavaAccumulatorFunctionExecutor.getResult(JavaAccumulatorFunctionExecutor.java:145)
	at org.drools.core.rule.SingleAccumulate.getResult(SingleAccumulate.java:138)
	... 48 more

Please provide a way to specify  MathContext for BigDecimal.divide() in order to avoid this exception.



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