[jboss-jira] [JBoss JIRA] (DROOLS-1715) Running DMN evaluation in parallel causes a ConcurrentModificationException

[Edson Tirelli (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-1715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Edson Tirelli reassigned DROOLS-1715:
-------------------------------------

    Assignee: Matteo Mortari  (was: Edson Tirelli)


> Running DMN evaluation in parallel causes a ConcurrentModificationException
> ---------------------------------------------------------------------------
>
>                 Key: DROOLS-1715
>                 URL: https://issues.jboss.org/browse/DROOLS-1715
>             Project: Drools
>          Issue Type: Bug
>          Components: dmn engine
>    Affects Versions: 7.2.0.Final
>            Reporter: David Le Moing
>            Assignee: Matteo Mortari
>
> When launching some Parameterized tests in parallel, I noticed that I was not getting any answer (it works with only 1 thread). When I started digging, I found that the cause was a ConcurrentModificationException thrown when iterating over events in the processEvents method of DMNDTExpressionEvaluator.
> {code}
> 	  at java.util.ConcurrentModificationException.<init>(ConcurrentModificationException.java:78)
> 	  at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
> 	  at java.util.ArrayList$Itr.next(ArrayList.java:851)
> 	  at org.kie.dmn.core.ast.DMNDTExpressionEvaluator.processEvents(DMNDTExpressionEvaluator.java:101)
> 	  at org.kie.dmn.core.ast.DMNDTExpressionEvaluator.evaluate(DMNDTExpressionEvaluator.java:92)
> 	  at org.kie.dmn.core.impl.DMNRuntimeImpl.evaluateDecision(DMNRuntimeImpl.java:337)
> 	  at org.kie.dmn.core.impl.DMNRuntimeImpl.evaluateAll(DMNRuntimeImpl.java:92)
> {code}



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