[jboss-jira] [JBoss JIRA] Closed: (JBRULES-1432) Thread safe queries

Thread safe queries ------------------- Key: JBRULES-1432 URL: https://jira.jboss.org/jira/browse/JBRULES-1432 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-core (expert) Affects Versions: 4.0.4 Environment: Sun 1.5.0_04 Windows Reporter: Steve Shabino Assignee: Mark Proctor Fix For: 5.1.0.M2 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.