[jboss-jira] [JBoss JIRA] (DROOLS-1487) Parallel agenda cycles itself or throws NPE

[Tibor Zimányi (JIRA)]

Tibor Zimányi created DROOLS-1487:
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             Summary: Parallel agenda cycles itself or throws NPE
                 Key: DROOLS-1487
                 URL: https://issues.jboss.org/browse/DROOLS-1487
             Project: Drools
          Issue Type: Bug
          Components: core engine
    Affects Versions: 7.0.0.Beta7
            Reporter: Tibor Zimányi
            Assignee: Mario Fusco


Running AdvOperatorsExpertBenchmark benchmarks from our kie-benchmarks suite with parallel agenda option, the benchmark either cycles itself or throws NPE [1]. I created a "reproducer" here[2]. Be aware that this is failing nondeterministically, so with high probability it is a nasty race condition. 

I tried to debug this a bit and this is the output of some variables that is available on this line [3]:
Returned fire count: 0
Head: null
Group: AgendaGroup 'MAIN'
Group is auto deactivate: true
Limit reached: false
IsInternalFire: false
IsFiring: true

[1] http://pastebin.com/sjLjQwgX
[2] https://github.com/kiegroup/kie-benchmarks/pull/8/files
[3] https://github.com/kiegroup/drools/blob/3038a1b9287978069bcb2765dc684f69683465a4/drools-core/src/main/java/org/drools/core/common/DefaultAgenda.java#L1084



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