[jboss-jira] [JBoss JIRA] (DROOLS-70) NPE when an event expires during evaluation of accumulate when run as fireUntilHalt()
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https://issues.jboss.org/browse/DROOLS-70?page=com.atlassian.jira.plugin....
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Edson Tirelli commented on DROOLS-70:
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Mario, I've been unable to reproduce this so far. I've run the test you created a
ton of times in a loop, but I can't reproduce the error in an i7 cpu.
In any case, the problem here is that event expiration is a WMA, so it shouldn't
happen concurrently with any other WMA action (like the insertion of new facts). If it is
happening, then the locks in the session are not being properly handled.
NPE when an event expires during evaluation of accumulate when run as
fireUntilHalt()
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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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