[jboss-jira] [JBoss JIRA] (DROOLS-81) Drools freezes during execution

[Andrew kelly (JIRA)]

Andrew kelly created DROOLS-81:
----------------------------------

             Summary: Drools freezes during execution
                 Key: DROOLS-81
                 URL: https://issues.jboss.org/browse/DROOLS-81
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 5.5
            Reporter: Andrew kelly
            Assignee: Mark Proctor


When Drools is being run to process rules on a number of threads on occasion the rules engine freezes with the stack trace below and does not complete. There are a number of other threads that are also frozen out waiting to lock 0x00002aab9d4caf58:


Frozen Thread

"pool-3-thread-8" prio=10 tid=0x00002ab53d16e000 nid=0x1c29 runnable [0x0000000049fc7000]
   java.lang.Thread.State: RUNNABLE
	at java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:408)
	- locked \<0x00002aab9d4caf58\> (a java.lang.ref.ReferenceQueue)
	at java.util.WeakHashMap.getTable(WeakHashMap.java:417)
	at java.util.WeakHashMap.get(WeakHashMap.java:464)
	at org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:241)
	at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:1039)
	at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:987)
	at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:377)
	at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:143)
	at org.mvel2.ast.ASTNode.optimize(ASTNode.java:159)
	at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:115)
	at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
	at org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)
	at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)
	at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:113)
	at org.mvel2.MVEL.executeExpression(MVEL.java:930)
	at org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:104)
	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
	- locked \<0x00002aaec5b1b160\> (a org.drools.common.DefaultAgenda)
	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)
	at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)
	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
	at com.iontrading.arc.liquidityrules.engine.BatchRulesEngine.processAll(BatchRulesEngine.java:64)
	at com.iontrading.arc.liquidityrules.api.rulestoresource.AbstractRuleStoreSourceService.performBaselineProcessing(AbstractRuleStoreSourceService.java:860)
	at com.rbc.erm.rulestoresource.RuleStoreSourceService.access$600(RuleStoreSourceService.java:32)
	at com.rbc.erm.rulestoresource.RuleStoreSourceService$RuleStoreProcess.call(RuleStoreSourceService.java:66)
	at com.rbc.erm.rulestoresource.RuleStoreSourceService$RuleStoreProcess.call(RuleStoreSourceService.java:38)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:722)

Example of other frozen threads:

"pool-3-thread-9" prio=10 tid=0x00002ab53d16f800 nid=0x1c2a waiting for monitor entry [0x000000004a0c9000]
   java.lang.Thread.State: BLOCKED (on object monitor)
 at java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:386)
 - waiting to lock \<0x00002aab9d4caf58\> (a java.lang.ref.ReferenceQueue)
 at java.util.WeakHashMap.getTable(WeakHashMap.java:417)
 at java.util.WeakHashMap.get(WeakHashMap.java:464)
 at org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:241)
 at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:1039)
 at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:987)
 at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:377)
 at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:143)
 at org.mvel2.ast.ASTNode.optimize(ASTNode.java:159)
 at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:115)
 at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
 at org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)
 at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)
 at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:113)
 at org.mvel2.MVEL.executeExpression(MVEL.java:930)
 at org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:104)
 at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
 - locked \<0x00002aaeedca2870\> (a org.drools.common.DefaultAgenda)
 at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)
 at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)
 at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
 at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
 at com.iontrading.arc.liquidityrules.engine.BatchRulesEngine.processAll(BatchRulesEngine.java:64)
 at com.rbc.erm.rulestoresource.RuleStoreSourceService.performViewProcessing(RuleStoreSourceService.java:133)
 at com.rbc.erm.rulestoresource.RuleStoreSourceService$RuleStoreProcess.call(RuleStoreSourceService.java:78)
 at com.rbc.erm.rulestoresource.RuleStoreSourceService$RuleStoreProcess.call(RuleStoreSourceService.java:38)
 at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
 at java.util.concurrent.FutureTask.run(FutureTask.java:166)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
 at java.lang.Thread.run(Thread.java:722)

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