Re: [rules-users] Exception executing predicate

Tuesday, 18 September 2007

    Krushnan,

    Isn't there a "cause by" down the stack trace? Current code for raising
the exception is:

        try {
            return this.expression.evaluate( object,
                                             null,
                                             this.previousDeclarations,
                                             this.localDeclarations,
                                             workingMemory );
        } catch ( final Exception e ) {
            throw new RuntimeDroolsException( "Exception executing predicate
" + this.expression,
                                              e );
        }

    All we can say for sure from the exception stack trace snippet you
provided is that it was raised in a rule named "Rule Cisco Systems", in the
first return value predicate.
    We need to improve that a bit I think.

    []s
    Edson

2007/9/18, Krishnan <krishiyer(a)gmail.com&gt;:
...

 Hi all,

 When exceptions occur during runtime of drools, is there a list of things
 to see to understand what may be causing
 this to happen ? I know it is a very generic question. I want to see if
 there is a methodical way to understand what
 to look for ?.

 org.drools.RuntimeDroolsException: Exception executing predicate

com.makesys.fs.is.dnpiac.vendorBehaviour.snmp.Rule_Cisco_Systems_0ReturnValue0Invoker@39d31fda
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java
 :197)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:122)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(
 CompositeObjectSinkAdapter.java:317)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(
 SingleObjectSinkAdapter.java:20)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.reteoo.Rete.assertObject(Rete.java:168)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.reteoo.ReteooWorkingMemory.doInsert (ReteooWorkingMemory.java
 :70)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java
 :848)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.common.AbstractWorkingMemory.insert (AbstractWorkingMemory.java
 :822)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java
 :60)
 INFO | jvm 1 | 2007/09/14 16:46:33 | at
 org.drools.base.DefaultKnowledgeHelper.insert (DefaultKnowledgeHelper.java
 :54)

 Any help is appreciated ?

 thanks,
 Krishnan.

 --
 Sivaramakrishna Iyer Krishnan (Anand)

 Never assume the obvious is true.
 - William Safire
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-- 
  Edson Tirelli
  Software Engineer - JBoss Rules Core Developer
  Office: +55 11 3529-6000
  Mobile: +55 11 9287-5646
  JBoss, a division of Red Hat @ www.jboss.com

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Re: [rules-users] Exception executing predicate