[jboss-jira] [JBoss JIRA] Created: (JBRULES-1432) Queries Executed while Rules are Firing Causes Exceptions

[Steve Shabino (JIRA)]

Queries Executed while Rules are Firing Causes Exceptions
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                 Key: JBRULES-1432
                 URL: http://jira.jboss.com/jira/browse/JBRULES-1432
             Project: JBoss Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Reteoo
    Affects Versions: 4.0.4
         Environment: Sun 1.5.0_04 Windows
            Reporter: Steve Shabino


We have a stateful WM into which we periodically (1) insert new facts and fire rules, and (2) execute queries.  Drools fails when we allow query execution in another thread during fireAllRules().

Set-up: 

- Every 10 seconds, Thread A inserts some facts and calls fireAllRules().  fireAllRules() is never called concurrently with itself.
- Thread B executes many getQueryResults() calls in series (no concurrency in query execution)

Our rule base uses shadow facts for all facts and is set up this way:

			conf.setAssertBehaviour(RuleBaseConfiguration.AssertBehaviour.EQUALITY);
			conf.setRemoveIdentities(true);
			conf.setLogicalOverride(RuleBaseConfiguration.LogicalOverride.DISCARD);
			conf.setMaintainTms(true);
			conf.setShadowProxy(true);

We are making some use of insertLogical().

Expected:

- Queries are run against the last consistent truth state, even while fireAllRules() is running.

Actual Behavior:

We get this exception:

        Caused by: java.lang.RuntimeException: Unable to pop
	at org.drools.util.PrimitiveLongStack.pop(PrimitiveLongStack.java:63)
	at org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:44)
	at org.drools.reteoo.ReteooWorkingMemory.getQueryResults(ReteooWorkingMemory.java:90)

This bug occurs under 4.04 and 4.1 Trunk as of 1/22.

Please let us know if we can provide additional information. 

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