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

[David LE MOING (JIRA)]

David LE MOING created DROOLS-1715:
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             Summary: 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: Edson Tirelli


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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