[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1572) sometimes getting ClassFieldExtractor error

[Ming Fang (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBRULES-1572?page=comments#action_12411686 ] 
            
Ming Fang commented on JBRULES-1572:
------------------------------------

I got the error using your test case. i'm running on a duo core machine.
==>[ActivationCreated(2225): rule=Auto Retract; tuple=[fact fid:1112:1112:[Person name='bobba fet']]
]
==>[ActivationCreated(2226): rule=Auto Retract; tuple=[fact fid:1113:1113:[Person name='bobba fet']]
]
[BeforeActivationFired(2225): rule=Auto Retract; tuple=[fact fid:1112:1112:[Person name='bobba fet']]
]
[AfterActivationFired(2225): rule=Auto Retract; tuple=[fact fid:-1:1112:null]
]
[BeforeActivationFired(2225): rule=Auto Retract; tuple=[fact fid:-1:1112:null]
]
Exception in thread "thread2" org.drools.spi.ConsequenceException: org.drools.FactException: Retract error: handle not found for object: null. Is it in the working memory?
	at org.drools.base.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:24)
	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:594)
	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:554)
	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:527)
	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:491)
	at org.drools.test.Test2$1.run(Test2.java:44)
	at java.lang.Thread.run(Thread.java:637)
Caused by: org.drools.FactException: Retract error: handle not found for object: null. Is it in the working memory?
	at org.drools.base.DefaultKnowledgeHelper.retract(DefaultKnowledgeHelper.java:144)
	at org.drools.test.Rule_Auto_Retract_0.consequence(Rule_Auto_Retract_0.java:7)
	at org.drools.test.Rule_Auto_Retract_0ConsequenceInvoker.evaluate(Rule_Auto_Retract_0ConsequenceInvoker.java:23)
	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:590)
	... 5 more
[BeforeActivationFired(2225): rule=Auto Retract; tuple=[fact fid:-1:1112:null]
]
Exception in thread "thread1" org.drools.spi.ConsequenceException: org.drools.FactException: Retract error: handle not found for object: null. Is it in the working memory?
	at org.drools.base.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:24)
	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:594)
	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:554)
	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:527)
	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:491)
	at org.drools.test.Test2$1.run(Test2.java:44)
	at java.lang.Thread.run(Thread.java:637)
Caused by: org.drools.FactException: Retract error: handle not found for object: null. Is it in the working memory?
	at org.drools.base.DefaultKnowledgeHelper.retract(DefaultKnowledgeHelper.java:144)
	at org.drools.test.Rule_Auto_Retract_0.consequence(Rule_Auto_Retract_0.java:7)
	at org.drools.test.Rule_Auto_Retract_0ConsequenceInvoker.evaluate(Rule_Auto_Retract_0ConsequenceInvoker.java:23)
	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:590)
	... 5 more



> sometimes getting ClassFieldExtractor error
> -------------------------------------------
>
>                 Key: JBRULES-1572
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-1572
>             Project: JBoss Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.0.0-M1, 4.0.4, 4.0.7
>            Reporter: Ming Fang
>         Assigned To: Mark Proctor
>             Fix For: 5.0.0-M1
>
>         Attachments: Foo.java, rule.drl, Test.java, Test.java
>
>
> Caused by: java.lang.NullPointerException
> 	at org.drools.base.com.ml.ax.ModelValue10285014$getModelValue.getDoubleValue(Unknown Source)
> 	at org.drools.base.ClassFieldExtractor.getDoubleValue(ClassFieldExtractor.java:191)
> 	at org.drools.rule.Declaration.getDoubleValue(Declaration.java:281)
> 	at com.ml.ax.drools.Rule_Quote_0ConsequenceInvoker.evaluate(Rule_Quote_0ConsequenceInvoker.java:17)
> 	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:586)
> This only happens sometimes but it completely breaks my program.

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