[jboss-jira] [JBoss JIRA] (DROOLS-70) NPE when an event expires during evaluation of accumulate when run as fireUntilHalt()

[Mario Fusco (JIRA)]

Mario Fusco created DROOLS-70:
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             Summary: NPE when an event expires during evaluation of accumulate when run as fireUntilHalt()
                 Key: DROOLS-70
                 URL: https://issues.jboss.org/browse/DROOLS-70
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
            Reporter: Mario Fusco
            Assignee: Edson Tirelli


The AccumulateNode.getFirstMatch() throws NPE when some already collected event expires. The problem occurs when thread A is running StatefulKnowledgeSession.fireUntilHalt() while thread B is inserting new events into the session.

The problem occurs when @expires is defined on the event. The lower the @expires value, the more likely the NPE occurs.

I added the testEventExpirationDuringAccumulate() to the CepEspTest that reproduces this issue.

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